Difference between revisions of "2019-07-18-LeadershipReports"

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August 1, 2019 Report - July 22 - Aug 16
+
July 18, 2019 Report - July 8 - Aug 2
 
'''Director - Todd Satogata''' <br>
 
'''Director - Todd Satogata''' <br>
  
 
Todd Satogata
 
Todd Satogata
  
−
   Previous two weeks (July 22 - August 2)
+
   Previous two weeks (July 8 - July 19)
 +
      - ADMIN: Travel, FY account planning
 +
      - ADMIN: DOE S&T review (Jul 11) and prep
 +
      - ADMIN: Max Bruker arrival planning
 +
      - ADMIN: Safety all-hands meeting (Jul 19)
 +
      - JLEIC: pCDR development, EICUG talk prep, coordination meetings
 +
      - JLEIC: parameter tables, lattices to baseline
 +
      - ODU: REU, graduate student mentoring
 +
      - ODU: Courtney Washington meeting (Jul 19)
 +
      - JACOW: ICALEPCS'19 invited talk coordination
 +
  Next two weeks (July 22 - August 2)
 
       - ADMIN: Travel, FY account planning
 
       - ADMIN: Travel, FY account planning
 
       - ADMIN: Academic writing workshop planning (Jul 24)
 
       - ADMIN: Academic writing workshop planning (Jul 24)
Line 10: Line 20:
 
       - JLEIC: pCDR development, Aug 2 submission prep, coordination meetings
 
       - JLEIC: pCDR development, Aug 2 submission prep, coordination meetings
 
       - JLEIC: parameter tables coordination
 
       - JLEIC: parameter tables coordination
−
  Next two weeks (Aug 5 - Aug 16)
+
 
−
      -
 
 
   
 
   
  
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Alex Bogacz
 
Alex Bogacz
 
    
 
    
−
   Previous two weeks (July 22 - Aug 2)
+
   Previous two weeks (July 8 - July 19)
 +
      - Machine support
 +
      - Expand USPAS lecture on Radiation Damping
 +
      - Revisions to Operations Training, MOODLE
 +
      - Final review of IOP submissions for the IPAC'19 Light Peer Review
 +
  Next two weeks (July 22 - Aug 2)
 
       - Vacation
 
       - Vacation
 
       - PRAB paper review
 
       - PRAB paper review
−
  Next two weeks (Aug 5 - Aug 16)
 
−
      - 
 
  
  
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Rui Li
 
Rui Li
 
    
 
    
−
   Previous two weeks (July 22 - Aug 2)
+
   Previous two weeks (July 8 - July 19)
 +
      - Participate the weekly ALS-U impedance meeting
 +
          - Interesting discussions with Karl Bane and Bob Warnock at the meeting
 +
          - Bob Warnock is modifying his code on microwave instability so that he can send to me  to run for JLEIC case
 +
      - Prepare for JLEIC impedance meeting on 6/17:
 +
          - Talking to Tim Michalski to prepare presentation on vision and status of the engineering design
 +
          - Talking to Rimmer to prepare presentation on vision and status of the feedback system
 +
      - Uneven bunch spectrum
 +
          - Write up technote for my analysis,
 +
          - start to look at its impact on the coupled-bunch instability growth rate
 +
      - Plasma cascade in the BNL Coherent-electron-cooling
 +
          - Read reference papers on, trying to catch up on their current status
 +
          - Remotely participated one CeC operation meeting on their upcoming experiment
 +
      - Assisted Walter Wittmer on R&D list
 +
          - Work with Bob Rimmer to prepare documents Walter requested for the R&D list, in particular, I'm the P.I. of
 +
            block 6 (impedance and instabilities) in the list
 +
          - Assisted with CBETA on CSR induced microbunching instability
 +
          - Georg's graduate student, William Lou, is following our suggestion to do convergence test of the microbunching
 +
            instability. He had questions for me and my former student Cheng-Ying Tsai. And we are helping him on the
 +
            problems.
 +
  Next two weeks (July 22 - Aug 2)
 
       - Impedance studies
 
       - Impedance studies
−
           - Setup JLEIC impedance meeting for 8/20 and update impedance wiki
+
           - Organize the JLEIC impedance meeting on 7/16
 
           - Participate ALS-U impedance meeting and discussions
 
           - Participate ALS-U impedance meeting and discussions
 
           - Continue to understand impedance analysis  
 
           - Continue to understand impedance analysis  
−
      - JLEIC collective instability studies
+
           - Help to coordinate impedance budget study at JLAB
−
           - Start to prepare for the paragraph Andrei Sergi needed for the joint EIC paper for NAPAC
+
      - Coupled bunch instability
−
          - Discuss with Mike Blaskwicz on instability mitigations in EIC
+
           - Continue with technote writing
−
      - CeC project
+
           - Continue with analysis of coupled bunch instability and the study of the impact of uneven bunch distribution
−
           - Participate in the CeC workshop with active discussions
+
            on growth rate
−
           - Prepare and present summary for 1st session of CeC workshop
 
−
          - Continue to participate CeC weekly meeting
 
−
  Next two weeks (Aug 5 - Aug 16)
 
−
      - JLEIC collective instability studies
 
−
          - Start to prepare for the paragraph Andrei Sergi needed for the joint EIC paper for NAPAC
 
−
          - Discuss with Mike Blaskwicz on instability mitigations in EIC
 
 
       - CeC project
 
       - CeC project
−
           - Prepare and present highlights of CeC workshop at JLEIC R&D meeting
+
           - Continue to understand the underline physics
−
           - Continue to participate CeC weekly meetings
+
           - Continue to participate their weekly meeting
−
       - JLEIC pCDR100
+
       - CSR in CBETA
−
           - Read over new version of pCDR100
+
           - Continue to give support/help on their CSR studies
−
          - Work on changes needed for the collective effect section
 
−
 
 
−
 
 
  
  
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Edy Nissen
 
Edy Nissen
 
    
 
    
−
     Previous two weeks (July 22 - August 2)
+
     Previous two weeks (July 8 - July 19)
−
       - I finished up my time as Optics on Call
+
       - Worked on tuning the LEB
−
       - I worked on a rough draft of the proposal for the DESIREE Experiment
+
       - Have been performing some duties as optics on call
−
       - I have been working on my section of the pCDR
+
       - Have been working on my proposal for the DESIREE experiment.
−
     Next two weeks (Aug 5 - Aug 16)
+
     Next two weeks (July 22 - Aug 2)
−
       - I will finalize the DESIREE proposal
+
       - I will finish and submit the proposal to the University of Stockholm
−
       - Continue any work needed for the pCDR
+
       - Finish up my tenure as Optics on Call
 +
      - Finish up my redesign work on the two boosters
  
  
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Chris Tennant
 
Chris Tennant
 
    
 
    
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       -  
+
       - Final LDRD slide prep and presentation
−
     Next two weeks (Aug 5 - Aug 16)
+
      - BNL CeC telecon presentation on greenfield ERL design
−
       -  
+
      - LERF Ops (single day for isotope run)
 +
      - Work on JSA initiative proposal
 +
      - Bagels with Andrei
 +
      - Interview panel for Machine Learning Programmer Analyst posting
 +
      - Leading ML Lunch Series
 +
      - Lay out 476 MHz version of linac for JLEIC ERL cooler
 +
     Next two weeks (July 8 - July 19)
 +
       - Propagate distribution from Fay through (completed) parts of JLEIC ERL cooler
 +
      - BNL CeC analysis of greenfield front end design
 +
      - Work on RF classifier pipeline
  
  
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Yuhong Zhang
 
Yuhong Zhang
  
−
   Previous two weeks (July 22 - Aug 2)
+
   Previous two weeks (June 24 - July 5)
−
       - Attended EICUG Meeting and APS DPF2019 meeting, gave a talk in each conference
+
       - Developed estimated luminosity curves for 140 GeV JLEIC with or without high energy cooling
−
       - Developed design concept and parameters for high luminosity JLEIC
+
       - Worked on a concept for 140 GeV JLEIC  
−
       - Word on appendix for preCDR100
+
       - Read chapter 3 of pre-CDR-100 and made corrections
−
       - Worked on FOA quarterly report
+
       - Worked on three talk slides.
−
   Next two weeks (Aug 5 - Aug 16)
+
   Next two weeks (July 8 - July 19)
−
       - Complete pre-CDR related documents
+
       - Continue work from previous weeks
−
      - Write papers for NA-PAC
 
−
 
 
  
  
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Max Bruker
 
Max Bruker
  
−
   Previous two weeks (July 22 - Aug 2)
+
   Previous two weeks (July 8 - July 19)
 +
      - Relocation
 +
      - Orientation and training
 +
      - Read some JLEIC-related material
 +
  Next two weeks (July 22 - Aug 2)
 
       - Shake some more hands
 
       - Shake some more hands
 
       - Familiarize myself further with JLEIC
 
       - Familiarize myself further with JLEIC
−
  Next two weeks (Aug 5 - Aug 16)
 
−
      -
 
  
  
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Fanglei Lin
 
Fanglei Lin
  
−
   Previous two weeks (July 22 - Aug 2)
+
   Previous two weeks (July 8 - July 19)
 
         - Working on updating the IR design in the electron collider ring
 
         - Working on updating the IR design in the electron collider ring
 
         - Working on the transparent spin project
 
         - Working on the transparent spin project
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           attended IP magnet design meeting, attended teleconference on transparent spin test meeting, attended Packing  
 
           attended IP magnet design meeting, attended teleconference on transparent spin test meeting, attended Packing  
 
           factor/drift limit program meeting
 
           factor/drift limit program meeting
−
   Next two weeks (Aug 5 - Aug 16)
+
   Next two weeks (July 8 - July 19)
 
         - Work on updating the IR design in the electron collider ring
 
         - Work on updating the IR design in the electron collider ring
 +
        - Work on the transparent spin project
 
         - Work on the storage ring cooler project
 
         - Work on the storage ring cooler project
 
         - Prepare tutorial material for ZGOUBI workshop
 
         - Prepare tutorial material for ZGOUBI workshop
−
 
  
  
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Bhawin Dhital
 
Bhawin Dhital
 
    
 
    
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
 
       - Working on elegant simulation using real parameters for RF cavities instead of using matrices.
 
       - Working on elegant simulation using real parameters for RF cavities instead of using matrices.
 
       - Introducing real lattices in elegant simulation instead of using matrices.
 
       - Introducing real lattices in elegant simulation instead of using matrices.
−
     Next two weeks (Aug 5 - Aug 16)
+
      - Understanding the theory on damping time and energy spread in two energy storage ring ( Dr. Krafft's tech note).
−
       - Will be working on longitudinal stability. Have to fix the problem introduced by non-linearity in accelerating
+
      - Making more progress in stability condition in two energy storage ring.
−
        cavity.
+
      - Enjoyed couple of days in New York. Found that CASA, Jefferson Lab is the best place for me to enjoy.
−
       - Start to write a paper for NAPAC2019.
+
     Next two weeks (July 22 - Aug 2)
−
       - Have to make more progress in \ Two Energy Storage Ring Cooler".
+
       - Come up with the final longitudinal stability in two energy storage ring with real lattices and real cavities.
 +
      - Introducing the damping element in simulation, calculate the damped emittance.
 +
       - Understand the concept of multiple energy storage ring (Dr. Krafft's new idea).
 +
       - Start to think about NAPAC2019.
  
  
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Vasiliy Morozov
 
Vasiliy Morozov
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
 +
      - Transparent spin experiment: spin tracking simulations, error analysis, teleconference with BNL collaborators
 +
      - Study of the 400 GeV ion collider ring upgrade: IR redesign, crab crossing estimates and polarization control
 +
        scheme
 +
      - Support of Walter's work
 +
    Next two weeks (July 22 - Aug 2)
 
       - Preparation for the CFNS summer school
 
       - Preparation for the CFNS summer school
 
       - Preparation of DoE quarterly reports
 
       - Preparation of DoE quarterly reports
 
       - Updating the pre-CDR
 
       - Updating the pre-CDR
 
       - Spin and beam dynamics simulations
 
       - Spin and beam dynamics simulations
−
    Next two weeks (Aug 5 - Aug 16)
 
−
      -
 
  
  
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Amy Sy
 
Amy Sy
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       - Distribution mapping for pre-strip to post-strip lead ion distributions based on parameterization from TRIM
+
       - Parameterization of the probability distribution for exit energies and angles for 13.1 MeV/u lead ions passing
−
         simulations.
+
         through carbon foils as a function of foil thickness and incident beam energy. Bilinear interpolation of the
−
      - PreCDR updates to ion sources and ion linac sections, particularly updating the ion linac section of Chapter 5. New
+
        probability distribution to account for variance in the foil thickness and energy spread in the incident beam.  
−
        end-to-end simulations for all three linacs and updates to the preCDR text to reflect the simulation results.
+
      - Mapping of the distribution for ions before the stripping foil to a distribution accounting for the energy straggle   
−
       - H- linac optimization in TRACK; end-to-end simulations for the 150 MeV linac result in ~100% emittance growth in
+
        and growth of angular spread due to multiple scattering effects in the stripping foil.  
−
         the H- beam, so optimization is in progress to improve on this emittance at the linac exit. Also implementing
+
       - Initial simulations in TRACK of stripping effects and transport of lead ion beams containing multiple charge
−
        alternating polarity in the solenoids of the accelerating cavities, in case of acceleration of vertically-polarized
+
        states; previous simulation included beam only stripped to a single charge state, and did not include energy or
−
        ions.
+
         angular spread effects in the stripped beam.
−
     Next two weeks (Aug 5 - Aug 16)
+
      - Some preliminary upstream stripping chicane elements implemented in MADX for initial beam optics matching.
−
       - Continued work on linac optimization for reduced transverse emittance.
+
     Next two weeks (July 22 - Aug 2)
−
      - Continued work on the stripping chicane optics design and matching to the stripped beam distribution.
+
       - Continued work on the distribution mapping for pre-strip to post-strip lead ion distributions, and stripping
−
       - Continued work with PyORBIT including: troubleshooting the DTL linac implementation and lack of beam stability, and
+
        chicane optics design and matching to the stripped beam distribution.
−
         optimization of the superconducting portion of the linac for better matching with TRACK. Also plan to discuss with
+
       - Continued work with PyORBIT including: troubleshooting the DTL linac implementation and lack of beam stability, and  
−
         ANL the possibility of converting the RF cavity field map files from binary Fortran files to something that can be
+
         optimization of the superconducting portion of the linac for better matching with TRACK. Also plan to discuss with  
 +
         ANL the possibility of converting the RF cavity field map files from binary Fortran files to something that can be  
 
         read into PyORBIT.  
 
         read into PyORBIT.  
−
 
+
      - Also the possibility of implementing the stripping chicane in PyORBIT for more flexibility in handling modified
 +
        beam distributions - TRACK does not appear able to do this.
  
  
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'''Computational Physics - Yves Roblin'''<br>
 
'''Computational Physics - Yves Roblin'''<br>
 
Yves Roblin
 
Yves Roblin
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       - CEBAF:
+
       - CEBAF:
−
       - JLEIC
+
          - Bteam, optics on call, machine setup
−
     Next two weeks (Aug 5 - Aug 16)
+
          - Technote writing on multiscanner emittance and beam properties determination in hall A.   
−
       -  
+
       - JLEIC:
 +
          - Quarterly report on beam-beam tools
 +
          - Investigating non linear RF transport in BB3D
 +
     Next two weeks (July 22 - Aug 2)
 +
       - More CEBAF optics support
 +
      - Simulation of bbeam kinematics for pCDR
  
  
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Randy Gamage
 
Randy Gamage
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       - Bare lattice DA optmization using tune
+
       - Scaled SuperKEKB FFQ multipole data
−
       - More DA studies with SuperKEKB data
+
      - Compared results obtained by different methods used to compensate chromaticity and found a larger DA than previous
−
     Next two weeks (Aug 5 - Aug 16)
+
        result.
−
       - Add ER FFQ data from G.Sabbi (LBNL) added as integrated multipoles for both ends of quads
+
       - Dynamic aperture with multipoles on one upstream FFQ using the SuperKEKB data  
−
       - Add multipole compensation (initial iteration)
+
      - Maximize bare lattice DA using tune (in progress) [tune: A program to apply the MINUIT minimization engine to an 
−
 
+
        arbitrary script.]
 +
     Next two weeks (July 22 - Aug 2)
 +
       - Maximize bare lattice DA using tune (in progress)
 +
       - Continue dynamic aperture studies with multipoles.
  
  
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River Huang
 
River Huang
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       -  
+
      - Spin Transparency Mode - For Spin Tracking (±𝟎° for two snakes, no IP bumps, 𝒔𝒚𝒏𝒄𝒉𝒓𝒐𝒏𝒐𝒖𝒔 𝒑𝒉𝒂𝒔𝒆=𝝅), the effects of
−
     Next two weeks (Aug 5 - Aug 16)
+
        adjusting the reference closed orbit length have been teased and checked. Involving the configuration for
−
       -  
+
        accelerations, the different configurations of Zgoubi parameter, “CAVITE”, have been tested.
 +
            - For Spin Tracking (±𝟎° for two snakes, no IP bumps, 𝒔𝒚𝒏𝒄𝒉𝒓𝒐𝒏𝒐𝒖𝒔 𝒑𝒉𝒂𝒔𝒆=0) using different RHIC’s
 +
              configurations, we have carried out the precise calibration on ALE angle and B1-field for PHIC’s
 +
              configurations based on Vasiliy’s analytic solution. Now the revised RHIC’s configuration will yield the spin
 +
              transparent.
 +
            - For Spin Tracking (±𝟎° for two snakes, with chromaticity’ compensation), Y-shift, Z-shift and the skew angle
 +
              changes have been introduced in RHIC’s configurations. The effect of the above shifts has been studied both
 +
              in the statistic results and Zgoubi simulation results.
 +
            - For Spin Tracking (±𝟎° for two snakes, with chromaticity’ compensation), the closed orbit was studied.
 +
            - The research progress was reported on the teleconference on transparent spin meeting (July 18, 2019)
 +
       - Program codes for Zgoubi - As a supplementary of Zgoubi, we designed and completed the following Python based
 +
        program codes:
 +
            - ALE_and_B1_Calibration.py
 +
            - ChangeREF_DY_DZ_for_Multipole_and_SkewAngle_for_Bend.py
 +
            - Closed_orbit_sigma_ALE_B1_and_DY_DZ.py
 +
            - Closed_orbit_sigma_ALE_B1_and_DY_DZ_and_Dphi.py
 +
     Next two weeks (July 22 - Aug 2)
 +
       - Keep working on the project of “Theoretical and Experimental Study of the Spin Transparency Mode in an EIC”.
  
  
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Isurumali Neththikumara
 
Isurumali Neththikumara
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       -  
+
       - Compared the luminosity output for all proposed energy values for JLEIC using BB3D and GHOST and calculated their
−
     Next two weeks (Aug 5 - Aug 16)
+
        relative differences.
−
       -  
+
      - Performed convergence studies to find the best slice number for hourglass simulation.
 +
      - Calculated the hourglass reduction using GHOST for CDR44.7 GeV
 +
     Next two weeks (July 22 - Aug 2)
 +
       - Perform gear changing simulations required for the submitted abstract of NAPAC2019
 +
      - Study the beam-beam dynamics with gear-changing
  
  
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He Zhang
 
He Zhang
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (June 24 - July 5)
−
       - Cooling code development - Added synchrotron oscillation in to sweeping effect simulation. In the sweeping effect,
+
       - Cooling code development - A model for sweeping effect has been added to JSPEC. We first calculated the maximum
−
         each time step still covers many synchrotron oscillation periods. So I just give a random phase advance to each ion
+
        friction for the given ion beam, electron beam and electron cooler. Then we calculate the proper acceleration of
−
         to represent the synchrotron oscillation. After taking this oscillation into account, the sweeping effect still
+
         the electron beam for the sweeping process and the time needed for it. Once the motion of the electron beam is
−
         works but becomes weaker. Another thing to notice is that the proton velocity distribution is swept to one end
+
        is determined, the sweeping process is simulated in n steps, where n is a number defined by the user. In each step,
−
         without the synchrotron oscillation, while it stays in the middle with the oscillation.  
+
         the friction force on all the ions are calculated with the increased relative velocity due to the motion of the
−
       - Beam-beam effect - Following Ji’s example, I add the C++ code of map-based symplectic tracking to BeamBeam3D. The
+
        electron beam and the kicks are applied on all ions. In the test run, the sweeping effect has been successfully
−
        files compile well but I always get an MPI error when running the executable file with mpirun. Tried to compile
+
         observed. But there are some issues left in the test: (1) cooling is artificially strengthened for demonstration;
−
        Ji’s original code and got the same error. I suspect this is not due to the new code. I am asking for help from Yun
+
        (2) transverse temperature of the ion beam is assumed to be zero; (3) synchrotron motion is ignore; (4) IBS effect
−
        and Ji.  
+
        is ignored. Will include these effect one by one later in the simulations.
−
       - IBS calculation - We have received the lattice of eRHIC and their ion beam parameters. I have picked up one set of
+
         Coding of the IBS formula by Kubo and Oide is finished, but the result is wrong. Has not figure out it is a bug in  
−
        parameters and calculated the IBS time, which agrees with their calculation.
+
        the code or any mistakes in the methodology that I implied.
−
     Next two weeks (Aug 5 - Aug 16)
+
       - Beam-beam effect - Revised our C++ symplectic tracking code and shipped it to Yun Luo.  
−
       - Personal leave
+
       - Others - Prepared the talk for my LDRD application and present to the LDRD review panel.  
 +
     Next two weeks (July 8 - July 19)
 +
       - Add symplectic tracking to BB3D and verify the codes together with Yun Luo. 
 +
      - Continue sweeping effect simulation.
 +
      - Abstract for COOL’19 conference.
  
  
Line 245: Line 319:
 
Kevin Jordan
 
Kevin Jordan
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (June 24 - July 5)
−
      -
 
−
    Next two weeks (Aug 5 - Aug 16)
 
 
       -  
 
       -  
 +
    Next two weeks (July 8 - July 19)
  
  
Line 254: Line 327:
 
Joe Gubeli
 
Joe Gubeli
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       -  
+
       - HPWS: The linear motor controller is undersized for the HWPS when the stage in at 45 degrees. This angle is the
−
     Next two weeks (Aug 5 - Aug 16)
+
        nominal operation angle. A collaborator from Radiabeam was here for a couple of day to try tuning the drive for
−
       -  
+
        better performance. This didn’t work and a larger
 +
        driver was ordered. The HPWS was moved to the optical table to allow operations in the horizontal position. This
 +
        allowed us to test the EPICS controls and to obtain scan data for a student summer project.
 +
      - Isotope: Helped with aligning and testing the diagnostics. Worked with operations during the two day run. At the
 +
        end we were able to thread beam to the 1G dump.
 +
      - FAST: Designed the tungsten slit plate, new fork and gimbal plate. The gimbal plate will allow the fork to be set
 +
        normal to the beam. The new fork and gimbal plate have been made and are ready for cleaning. Order titanium bolts
 +
        to replace the silver plated bolts in the LDRDS.
 +
     Next two weeks (July 22 - Aug 2)
 +
       - HPWS: Use the new dynamic tuning SW to improve performance before the larger controller arrives. Test the
 +
        incremental encoder with a long cable.
 +
      - Isotope: Complete the alignment and installation of the shield wall. Support the upcoming review.
 +
      - FAST: Supervise the disassembly, cleaning and partial assembly of the LDRDS.
 +
      - Halo Monitor: Align and install a fiber coupler and camera assemble to be able to obtain spectrum from the
 +
        electron/BNNT interaction.
  
  
Line 263: Line 350:
 
Michael Tiefenback
 
Michael Tiefenback
  
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       - Vacation interleaved with remotely addressing HPS and magnet system configuration
+
       - Spent essentially all of my time on real-time support of the accelerator tuning and improvements to the Hall B
−
     Next two weeks (Aug 5 - Aug 16)
+
        setup process (see below).  Plus a few days of vacation leave. 
−
       - Vacation leave plus dealing on-site with HPS and magnet system configuration issues
+
          - The envelope-based matching scheme I proposed to improve accelerator tuning (prospectively supported by the
 +
            Arc 7A SLM complement, of which the 7A08 sync. light monitor is the first) is the motivation of the process I
 +
            initiated with operators during tuning of the accelerator this round.  It became clear that with the Spreader
 +
            matching quadrupoles "on design," empirical adjustment of the defined envelope tuning knobs of the previous
 +
            Recombiner to make the viewer spots of the following recirculation arc most alike was a protocol which matched
 +
            the beam across the linac in a "best practically achievable" sense.  This provides minimally perturbed beam
 +
            optics across the linac and through the Spreader, minimizing time in execution to make the qsUtility scans and  
 +
            re-match through the Spreader.  Boron Nitride NanoTube material, as recently installed at viewer ITV7A09, may
 +
            also provide a sufficiently well-resolved image of the beam (although invasive in image acquisition) to serve
 +
            this purpose. This may be a feasible alternative to distributing SLMs throughout the arcs, sidestepping the
 +
            characteristic blooming limitation of the original ChromOx viewer material which has prevented application of
 +
            the original (late '80s) design intent of using the viewers in this way.
 +
     Next two weeks (July 22 - Aug 2)
 +
       - Scheduled leave for the following two-week calendar period
  
  
Line 274: Line 374:
 
LERF - Steve Benson  
 
LERF - Steve Benson  
 
   
 
   
−
     Previous two weeks (July 22 - Aug 2)
+
     Previous two weeks (July 8 - July 19)
−
       - Completed quarterlies for the FOA contract and the budget for the isotope project.
+
       - Worked on finalizing documentation for Isotope ERR.
−
       - Continued to work on updating the Pre-CDR-100 chapter 6.
+
      - Worked on quarterly summaries for FOA contract and budget for Isotope quarterly.
−
      - Helped to host visiting graduate students from the University of New Mexico Institute of Mining Technology
+
       - Assisted in running the LERF beam to the 1G dump to check out the Beamline hardware for isotope production.
−
       - Set up shipment for LDRD to Fermilab.
+
       - Set up two August Accelerator Seminars.  
−
       - Hosted Ivan Konoplev for seminar and set up seminar for Steve Jamison.
+
       - Reviewed RSI paper.
−
      - Completed drafts of all documents for Isotope ERR
+
     Next two weeks (July 22 - Aug 2)
−
     Next two weeks (Aug 5 - Aug 16)
+
       - Get LDRD sent to Fermilab.
−
       - Complete chapter 6 for Pre-CDR
+
       - Finalize documentation for isotope ERR
−
      - Host seminar for Grigory Eremeev
+
       - Complete quarterlies for the FOA contract and the budget for the isotope project.
−
       - Finalize documentation for isotope ERR
+
       - Continue to work on updating the Pre-CDR-100 chapter 6.
−
       - Start putting together talks for ERL 2019
 
−
       - Set up seminars for other Scientist III candidates
 
−
 
 
  
  
Line 293: Line 390:
 
Andrew Hutton
 
Andrew Hutton
 
   
 
   
−
     Previous two weeks (July 22 - Aug 2 )
+
     Previous two weeks (July 8 - July 19)
−
       - July 22- July 29: primary focus on the isotope project
+
       - Attended the SuperKEKB Review in Japan July 8-10. A lot of  information that is very relevant to JLEIC,
−
      - July 22: visit to VCU to test out our designs for the crucible removal and opening using a remote manipulator. It
+
        particularly in the background and collimation topics. All the talks are available on the web at
−
         was successful, but several opportunities for improvement were noted , and have since been made by Kevin and Joe.   
+
         http://www-kekb.kek.jp/MAC/.   
−
       - July 22 - July 26: visit by Robert Bentley and Geno Santistevan, PhD students at New Mexico Tech. They attempted
+
       - Then a few days vacation in Koyasan
−
        to make thermal measurements (a bust) carried out FLUKA calculations to determine the amount of radiation
+
      - This week in Isotopes,  we have got pulsed beam to the 1G dump, still need CW (awaiting the MPS masks) and then
−
         immediately following the irradiation and following the decay.  We have tentatively changed our irradiation
+
         getting the beam to our target, the 1X line.  We have
−
         protocol for 10 hour cool-down time rather than 24 hours initially proposed.  This enables us to extend the
+
         made considerable progress on the equipment to unscrew the carbon plug in the back of the crucible (Kevin has built
−
         irradiation time for more Cu67 production.   
+
        a turntable to rotate the crucible in the hot-cell while the remote manipulator is used to hold the plug). 
−
      - July 26: the quarterly report for the isotope project was submitted to the DOE on time.   
+
         Everything is now ready for a trial transfer to VCU.  We will pack the crucible into the pig into the shipping
−
       - July 29-August 2: Read large portions of the pCDR-100 and made corrections, mostly English but some substantive
+
        container today.   
−
        comments.  Also spent a lot of time with Sarah who finally got GPT running on the WiFEL Gun.  Sarah presented at
+
       - I did a little editing of the pCDR.  I also spent some time with Sarah.     
−
        the Friday lunchtime poster session and had a lot of interactions with people (who would be surprised?).     
+
     Next two weeks (July 22 - Aug 2)
−
     Next two weeks (Aug 5 - Aug 16)
+
       - We (Kevin, Joe and Keith Welch) will go up to VCU on Monday to test the unpacking of the pig from the shipping
−
       - Focus on nailing down the Isotope run and helping Steve finalize the safety documentation.   
+
        container (with VCU RadCon) and then opening the pig in the hot-cell using remote manipulators (with Jamal’s group. 
−
       - Continue the pCDR editing
+
        The two students from NMT, Geno Santistevan and Robert Bentley, will be here next week.  They will be doing
−
       - Help Sarah really make progress on the WiFEL simulations.
+
        thermal transfer measurements and getting up to speed on everything we have been doing.  I have asked them to give
 +
        us a presentation of their work so far.   
 +
       - I will also be doing a lot of pCDR editing. 
 +
       - This is Sarah’s last two weeks, so she might need help finishing her project.  The poster and paper are already
 +
        partially written.

Latest revision as of 11:25, 5 August 2019

July 18, 2019 Report - July 8 - Aug 2 Director - Todd Satogata

Todd Satogata 

  Previous two weeks (July 8 - July 19)
     - ADMIN: Travel, FY account planning
     - ADMIN: DOE S&T review (Jul 11) and prep
     - ADMIN: Max Bruker arrival planning
     - ADMIN: Safety all-hands meeting (Jul 19)
     - JLEIC: pCDR development, EICUG talk prep, coordination meetings
     - JLEIC: parameter tables, lattices to baseline
     - ODU: REU, graduate student mentoring
     - ODU: Courtney Washington meeting (Jul 19)
     - JACOW: ICALEPCS'19 invited talk coordination
  Next two weeks (July 22 - August 2)
     - ADMIN: Travel, FY account planning
     - ADMIN: Academic writing workshop planning (Jul 24)
     - ODU: REU student mentoring, ODU presentation (Jul 26)/poster/paper prep
     - JLEIC: pCDR development, Aug 2 submission prep, coordination meetings
     - JLEIC: parameter tables coordination



Alex Bogacz 

  Previous two weeks (July 8 - July 19)
     - Machine support 
     - Expand USPAS lecture on Radiation Damping
     - Revisions to Operations Training, MOODLE 
     - Final review of IOP submissions for the IPAC'19 Light Peer Review
  Next two weeks (July 22 - Aug 2)
     - Vacation
     - PRAB paper review



Rui Li 

  Previous two weeks (July 8 - July 19)
     - Participate the weekly ALS-U impedance meeting 
          - Interesting discussions with Karl Bane and Bob Warnock at the meeting
          - Bob Warnock is modifying his code on microwave instability so that he can send to me  to run for JLEIC case
     - Prepare for JLEIC impedance meeting on 6/17:
          - Talking to Tim Michalski to prepare presentation on vision and status of the engineering design 
          - Talking to Rimmer to prepare presentation on vision and status of the feedback system
     - Uneven bunch spectrum
          - Write up technote for my analysis,
          - start to look at its impact on the coupled-bunch instability growth rate 
     - Plasma cascade in the BNL Coherent-electron-cooling 
          - Read reference papers on, trying to catch up on their current status
          - Remotely participated one CeC operation meeting on their upcoming experiment
     - Assisted Walter Wittmer on R&D list
          - Work with Bob Rimmer to prepare documents Walter requested for the R&D list, in particular, I'm the P.I. of
            block 6 (impedance and instabilities) in the list
          - Assisted with CBETA on CSR induced microbunching instability
          - Georg's graduate student, William Lou, is following our suggestion to do convergence test of the microbunching
            instability. He had questions for me and my former student Cheng-Ying Tsai. And we are helping him on the
            problems.
  Next two weeks (July 22 - Aug 2)
     - Impedance studies
          - Organize the JLEIC impedance meeting on 7/16
          - Participate ALS-U impedance meeting and discussions
          - Continue to understand impedance analysis 
          - Help to coordinate impedance budget study at JLAB
     - Coupled bunch instability
          - Continue with technote writing
          - Continue with analysis of coupled bunch instability and the study of the impact of uneven bunch distribution 
            on growth rate
     - CeC project
          - Continue to understand the underline physics
          - Continue to participate their weekly meeting
     - CSR in CBETA
          - Continue to give support/help on their CSR studies



Edy Nissen 

   Previous two weeks (July 8 - July 19)
     - Worked on tuning the LEB
     - Have been performing some duties as optics on call
     - Have been working on my proposal for the DESIREE experiment. 
   Next two weeks (July 22 - Aug 2)
     - I will finish and submit the proposal to the University of Stockholm
     - Finish up my tenure as Optics on Call
     - Finish up my redesign work on the two boosters



Chris Tennant 

   Previous two weeks (July 8 - July 19)
     - Final LDRD slide prep and presentation
     - BNL CeC telecon presentation on greenfield ERL design
     - LERF Ops (single day for isotope run)
     - Work on JSA initiative proposal
     - Bagels with Andrei
     - Interview panel for Machine Learning Programmer Analyst posting
     - Leading ML Lunch Series
     - Lay out 476 MHz version of linac for JLEIC ERL cooler
   Next two weeks (July 8 - July 19)
     - Propagate distribution from Fay through (completed) parts of JLEIC ERL cooler
     - BNL CeC analysis of greenfield front end design
     - Work on RF classifier pipeline




Accelerator R & D - Yuhong Zhang

Yuhong Zhang 

  Previous two weeks (June 24 - July 5)
     - Developed estimated luminosity curves for 140 GeV JLEIC with or without high energy cooling 
     - Worked on a concept for 140 GeV JLEIC 
     - Read chapter 3 of pre-CDR-100 and made corrections 
     - Worked on three talk slides.
  Next two weeks (July 8 - July 19)
     - Continue work from previous weeks


Max Bruker 

  Previous two weeks (July 8 - July 19)
     - Relocation
     - Orientation and training
     - Read some JLEIC-related material
  Next two weeks (July 22 - Aug 2)
     - Shake some more hands
     - Familiarize myself further with JLEIC



Fanglei Lin 

  Previous two weeks (July 8 - July 19)
       - Working on updating the IR design in the electron collider ring
       - Working on the transparent spin project
       - Working on the storage ring cooler project
       - Preparing tutorial material for ZGOUBI workshorp
       - Miscellaneous: attended the Innovative HE Cooling Project Status meeting, attended the Storage Ring Cooler 
         meeting, attended JLEIC R&D meeting, attended ZGOUBI workshop committee meetings, attended JLEIC general meeting, 
         attended IP magnet design meeting, attended teleconference on transparent spin test meeting, attended Packing 
         factor/drift limit program meeting
  Next two weeks (July 8 - July 19)
       - Work on updating the IR design in the electron collider ring
       - Work on the transparent spin project
       - Work on the storage ring cooler project
       - Prepare tutorial material for ZGOUBI workshop


Bhawin Dhital 

   Previous two weeks (July 8 - July 19)
     - Working on elegant simulation using real parameters for RF cavities instead of using matrices.
     - Introducing real lattices in elegant simulation instead of using matrices.
     - Understanding the theory on damping time and energy spread in two energy storage ring ( Dr. Krafft's tech note).
     - Making more progress in stability condition in two energy storage ring.
     - Enjoyed couple of days in New York. Found that CASA, Jefferson Lab is the best place for me to enjoy.
   Next two weeks (July 22 - Aug 2)
     - Come up with the final longitudinal stability in two energy storage ring with real lattices and real cavities.
     - Introducing the damping element in simulation, calculate the damped emittance.
     - Understand the concept of multiple energy storage ring (Dr. Krafft's new idea).
     - Start to think about NAPAC2019.



Vasiliy Morozov 

   Previous two weeks (July 8 - July 19)
     - Transparent spin experiment: spin tracking simulations, error analysis, teleconference with BNL collaborators
     - Study of the 400 GeV ion collider ring upgrade: IR redesign, crab crossing estimates and polarization control
       scheme
     - Support of Walter's work
   Next two weeks (July 22 - Aug 2)
     - Preparation for the CFNS summer school
     - Preparation of DoE quarterly reports
     - Updating the pre-CDR
     - Spin and beam dynamics simulations



Amy Sy 

   Previous two weeks (July 8 - July 19)
     - Parameterization of the probability distribution for exit energies and angles for 13.1 MeV/u lead ions passing 
       through carbon foils as a function of foil thickness and incident beam energy. Bilinear interpolation of the 
       probability distribution to account for variance in the foil thickness and energy spread in the incident beam. 
     - Mapping of the distribution for ions before the stripping foil to a distribution accounting for the energy straggle    
       and growth of angular spread due to multiple scattering effects in the stripping foil. 
     - Initial simulations in TRACK of stripping effects and transport of lead ion beams containing multiple charge
       states; previous simulation included beam only stripped to a single charge state, and did not include energy or
       angular spread effects in the stripped beam.
     - Some preliminary upstream stripping chicane elements implemented in MADX for initial beam optics matching.
   Next two weeks (July 22 - Aug 2)
     - Continued work on the distribution mapping for pre-strip to post-strip lead ion distributions, and stripping
       chicane optics design and matching to the stripped beam distribution.
     - Continued work with PyORBIT including: troubleshooting the DTL linac implementation and lack of beam stability, and 
       optimization of the superconducting portion of the linac for better matching with TRACK. Also plan to discuss with 
       ANL the possibility of converting the RF cavity field map files from binary Fortran files to something that can be 
       read into PyORBIT. 
     - Also the possibility of implementing the stripping chicane in PyORBIT for more flexibility in handling modified
       beam distributions - TRACK does not appear able to do this.




Computational Physics - Yves Roblin
Yves Roblin 

   Previous two weeks (July 8 - July 19)
     -  CEBAF:
          - Bteam, optics on call, machine setup
          - Technote writing on multiscanner emittance and beam properties determination in hall A.    
     - JLEIC:
          - Quarterly report on beam-beam tools
          - Investigating non linear RF transport in BB3D
   Next two weeks (July 22 - Aug 2)
     - More CEBAF optics support
     - Simulation of bbeam kinematics for pCDR



Randy Gamage 

   Previous two weeks (July 8 - July 19)
     - Scaled SuperKEKB FFQ multipole data 
     - Compared results obtained by different methods used to compensate chromaticity and found a larger DA than previous 
       result.
     - Dynamic aperture with multipoles on one upstream FFQ using the SuperKEKB data 
     - Maximize bare lattice DA using tune (in progress) [tune: A program to apply the MINUIT minimization engine to an   
       arbitrary script.]
   Next two weeks (July 22 - Aug 2)
     - Maximize bare lattice DA using tune (in progress)
     - Continue dynamic aperture studies with multipoles.


River Huang 

   Previous two weeks (July 8 - July 19)
     - Spin Transparency Mode - For Spin Tracking (±𝟎° for two snakes, no IP bumps, 𝒔𝒚𝒏𝒄𝒉𝒓𝒐𝒏𝒐𝒖𝒔 𝒑𝒉𝒂𝒔𝒆=𝝅), the effects of 
       adjusting the reference closed orbit length have been teased and checked. Involving the configuration for 
       accelerations, the different configurations of Zgoubi parameter, “CAVITE”, have been tested.
           - For Spin Tracking (±𝟎° for two snakes, no IP bumps, 𝒔𝒚𝒏𝒄𝒉𝒓𝒐𝒏𝒐𝒖𝒔 𝒑𝒉𝒂𝒔𝒆=0) using different RHIC’s
             configurations, we have carried out the precise calibration on ALE angle and B1-field for PHIC’s
             configurations based on Vasiliy’s analytic solution. Now the revised RHIC’s configuration will yield the spin
             transparent.
           - For Spin Tracking (±𝟎° for two snakes, with chromaticity’ compensation), Y-shift, Z-shift and the skew angle 
             changes have been introduced in RHIC’s configurations. The effect of the above shifts has been studied both
             in the statistic results and Zgoubi simulation results.
           - For Spin Tracking (±𝟎° for two snakes, with chromaticity’ compensation), the closed orbit was studied.
           - The research progress was reported on the teleconference on transparent spin meeting (July 18, 2019)
     - Program codes for Zgoubi - As a supplementary of Zgoubi, we designed and completed the following Python based 
       program codes:
           - ALE_and_B1_Calibration.py
           - ChangeREF_DY_DZ_for_Multipole_and_SkewAngle_for_Bend.py
           - Closed_orbit_sigma_ALE_B1_and_DY_DZ.py
           - Closed_orbit_sigma_ALE_B1_and_DY_DZ_and_Dphi.py
   Next two weeks (July 22 - Aug 2)
     - Keep working on the project of “Theoretical and Experimental Study of the Spin Transparency Mode in an EIC”.


Isurumali Neththikumara 

   Previous two weeks (July 8 - July 19)
     - Compared the luminosity output for all proposed energy values for JLEIC using BB3D and GHOST and calculated their 
       relative differences.
     - Performed convergence studies to find the best slice number for hourglass simulation.
     - Calculated the hourglass reduction using GHOST for CDR44.7 GeV
   Next two weeks (July 22 - Aug 2)
     - Perform gear changing simulations required for the submitted abstract of NAPAC2019
     - Study the beam-beam dynamics with gear-changing



He Zhang 

   Previous two weeks (June 24 - July 5)
     - Cooling code development - A model for sweeping effect has been added to JSPEC. We first calculated the maximum
       friction for the given ion beam, electron beam and electron cooler. Then we calculate the proper acceleration of
       the electron beam for the sweeping process and the time needed for it. Once the motion of the electron beam is 
       is determined, the sweeping process is simulated in n steps, where n is a number defined by the user. In each step, 
       the friction force on all the ions are calculated with the increased relative velocity due to the motion of the 
       electron beam and the kicks are applied on all ions. In the test run, the sweeping effect has been successfully 
       observed. But there are some issues left in the test: (1) cooling is artificially strengthened for demonstration; 
       (2) transverse temperature of the ion beam is assumed to be zero; (3) synchrotron motion is ignore; (4) IBS effect 
       is ignored. Will include these effect one by one later in the simulations. 
       Coding of the IBS formula by Kubo and Oide is finished, but the result is wrong. Has not figure out it is a bug in 
       the code or any mistakes in the methodology that I implied.  
     - Beam-beam effect - Revised our C++ symplectic tracking code and shipped it to Yun Luo. 
     - Others - Prepared the talk for my LDRD application and present to the LDRD review panel. 
   Next two weeks (July 8 - July 19)
     - Add symplectic tracking to BB3D and verify the codes together with Yun Luo.  
     - Continue sweeping effect simulation.
     - Abstract for COOL’19 conference.


Diagnostic Development - Kevin Jordan

Kevin Jordan 

   Previous two weeks (June 24 - July 5)
     - 
   Next two weeks (July 8 - July 19)


Joe Gubeli 

   Previous two weeks (July 8 - July 19)
     - HPWS: The linear motor controller is undersized for the HWPS when the stage in at 45 degrees. This angle is the
       nominal operation angle. A collaborator from Radiabeam was here for a couple of day to try tuning the drive for 
       better performance. This didn’t work and a larger 
       driver was ordered. The HPWS was moved to the optical table to allow operations in the horizontal position. This 
       allowed us to test the EPICS controls and to obtain scan data for a student summer project. 
     - Isotope: Helped with aligning and testing the diagnostics. Worked with operations during the two day run. At the
       end we were able to thread beam to the 1G dump.
     - FAST: Designed the tungsten slit plate, new fork and gimbal plate. The gimbal plate will allow the fork to be set 
       normal to the beam. The new fork and gimbal plate have been made and are ready for cleaning. Order titanium bolts
       to replace the silver plated bolts in the LDRDS.
   Next two weeks (July 22 - Aug 2)
     - HPWS: Use the new dynamic tuning SW to improve performance before the larger controller arrives. Test the 
       incremental encoder with a long cable.
     - Isotope: Complete the alignment and installation of the shield wall. Support the upcoming review.
     - FAST: Supervise the disassembly, cleaning and partial assembly of the LDRDS.
     - Halo Monitor: Align and install a fiber coupler and camera assemble to be able to obtain spectrum from the 
       electron/BNNT interaction.


Michael Tiefenback 

   Previous two weeks (July 8 - July 19)
     - Spent essentially all of my time on real-time support of the accelerator tuning and improvements to the Hall B
       setup process (see below).  Plus a few days of vacation leave.  
          - The envelope-based matching scheme I proposed to improve accelerator tuning (prospectively supported by the
            Arc 7A SLM complement, of which the 7A08 sync. light monitor is the first) is the motivation of the process I 
            initiated with operators during tuning of the accelerator this round.  It became clear that with the Spreader 
            matching quadrupoles "on design," empirical adjustment of the defined envelope tuning knobs of the previous 
            Recombiner to make the viewer spots of the following recirculation arc most alike was a protocol which matched 
            the beam across the linac in a "best practically achievable" sense.  This provides minimally perturbed beam 
            optics across the linac and through the Spreader, minimizing time in execution to make the qsUtility scans and 
            re-match through the Spreader.  Boron Nitride NanoTube material, as recently installed at viewer ITV7A09, may 
            also provide a sufficiently well-resolved image of the beam (although invasive in image acquisition) to serve 
            this purpose. This may be a feasible alternative to distributing SLMs throughout the arcs, sidestepping the 
            characteristic blooming limitation of the original ChromOx viewer material which has prevented application of 
            the original (late '80s) design intent of using the viewers in this way.
   Next two weeks (July 22 - Aug 2)
     - Scheduled leave for the following two-week calendar period


CASA Fellows
LERF - Steve Benson 

   Previous two weeks (July 8 - July 19)
     - Worked on finalizing documentation for Isotope ERR.
     - Worked on quarterly summaries for FOA contract and budget for Isotope quarterly.
     - Assisted in running the LERF beam to the 1G dump to check out the Beamline hardware for isotope production. 
     - Set up two August Accelerator Seminars. 
     - Reviewed RSI paper.
   Next two weeks (July 22 - Aug 2)
     -	Get LDRD sent to Fermilab.
     - Finalize documentation for isotope ERR
     - Complete quarterlies for the FOA contract and the budget for the isotope project.
     - Continue to work on updating the Pre-CDR-100 chapter 6.


Andrew Hutton 

   Previous two weeks (July 8 - July 19)
     - Attended the SuperKEKB Review in Japan July 8-10. A lot of  information that is very relevant to JLEIC,
       particularly in the background and collimation topics. All the talks are available on the web at 
       http://www-kekb.kek.jp/MAC/.  
     - Then a few days vacation in Koyasan
     - This week in Isotopes,  we have got pulsed beam to the 1G dump, still need CW (awaiting the MPS masks) and then 
       getting the beam to our target, the 1X line.  We have
       made considerable progress on the equipment to unscrew the carbon plug in the back of the crucible (Kevin has built
       a turntable to rotate the crucible in the hot-cell while the remote manipulator is used to hold the plug).   
       Everything is now ready for a trial transfer to VCU.  We will pack the crucible into the pig into the shipping
       container today.  
     - I did a little editing of the pCDR.  I also spent some time with Sarah.    
   Next two weeks (July 22 - Aug 2)
     - We (Kevin, Joe and Keith Welch) will go up to VCU on Monday to test the unpacking of the pig from the shipping
       container (with VCU RadCon) and then opening the pig in the hot-cell using remote manipulators (with Jamal’s group.  
       The two students from NMT, Geno Santistevan and Robert Bentley, will be here next week.  They will be doing
       thermal transfer measurements and getting up to speed on everything we have been doing.  I have asked them to give 
       us a presentation of their work so far.  
     - I will also be doing a lot of pCDR editing.  
     - This is Sarah’s last two weeks, so she might need help finishing her project.  The poster and paper are already
       partially written.
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