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February 18, 2021 Report - Feb 1 - Feb 26 Director - Todd Satogata

Todd Satogata

  Previous two weeks (Feb 1 - Feb 12) 
  Next two weeks (Feb 15 - Feb 26) 

Alex Bogacz

  Previous two weeks (Feb 1 - Feb 12) 
     - Switchyard strategies for FFA@CEBAF
     - Setting up GA for linac optics (one-on-one with Isturumali)
     - Muon acceleration writeup for Muon Collider Study Group. 
  Next two weeks (Feb 15 - Feb 26)
     - Presentation on switchyard for FFA@CEBAF
     - Collaboration with Kevin Andre on PERLE end-to-end tracking
     - PRAB paper review
     - White Paper on future CEBAF - writeup on FFA energy doubling

Ryan Bodenstein

  Previous two weeks (Feb 1 - Feb 12) 
     - First day on the 1st
     -	NEO for 3 mornings, normal onboarding stuff
     -	Lots of training, got badge
     -	Got laptop
     -	More training, getting into the actual work process
  Next two weeks (Feb 15 - Feb 26)
     - First timesheet submitted
     -	Benefits, etc… selected, updated, etc…
     -	House hunting *finally* successful – Yorktown will be home 
     -	Started trying (and not always successfully) to configure Mac for various codes
             -	Optim – tried running on Wine, but might not work on Catalina
             -	Looked into Sirepo to use multiple codes (Zgoubi, Elegant, Mad-X, etc…)

 - Free version seems ok, will see if need paid version

             -	Need to see how to access cluster computer
     -	Met with Vasiliy to brainstorm if/how I could best contribute to EIC
             -	Still requires some thought/discussion, but there are good options
     -	All web-based training completed. Anything on-site (med, rad worker, etc…) has to wait

Rui Li

  Previous two weeks (Jan 18 - Jan 29)
     - Prepare slides for my CBB and TCBI presentation
     - Listen to EIC OPA CD1 review and presentations
     - Prepare abstracts for IPAC21 
     -	CeC review committee discussions
  Next two weeks (Feb 1 - Feb 12) 
     - Writing up technote to summarize our CBB and TCBI studies
     -	EIC impedance meeting
     - Extensive discussions about CSR shielding for eSR dipoles in EIC

Edy Nissen

   Previous two weeks (Jan 18 - Jan 29)
     - Attended EIC beam-beam meetings
     - Attended Bteam and cold startup meetings
     - Worked on DODGE paper
     - Worked on ECA proposal
   Next two weeks (Feb 1 - Feb 12)
     - Attend Bteam and Cold startup meetings
     - Attend EIC beam-beam meetings
     - Performed measurements at DESIREE on Feb 3
     - Working on ECA proposal
     - Sitting on ERR panel for CPP/NPP E12-13-008 / 008A

Chris Tennant

   Previous two weeks (Feb 1 - Feb 12)
     - AI lunch (web, administrative, public affairs, speaker coordination, etc.)
     - Attend seminars (OWLE, AI Lunch, etc.)
     -	AIFOA1: finalize and submit quarterly report, initial packet of information request
     -	ARDFML: analysis of different datasets to understand why ML models give different performance
     -	Serve on hiring committee for Data Science Department Head(seminar, interview, pre- and post-interview meetings)
     -	Mentoring grad student duties: hosting foreign national training, paperwork, graduate student progress review
   Next two weeks (Feb 15 - Feb 26)
     - AI lunch (web, administrative, public affairs, speaker coordination, etc.)
     -	Attend seminars (OWLE, Accelerator, AI Lunch, SLAC AI seminar, etc.)
     -	AIFOA1: discussions on data requirements on new C100 scope mode, understanding implications for future AI work
     -	RADSMA: data exploration, training autoencoder models on data, need to understand how to take into account beam intensity dependent measurements
     -	ARDFML: unsupervised learning and data exploration to understand differences in two different data sets
     -	PRAB manuscript review

Accelerator R & D - Yuhong Zhang

Yuhong Zhang

  Previous two weeks (Jan 18 - Jan 29)
  Next two weeks (Feb 1 - Feb 12)

Max Bruker

  Previous (Jan 18 - Jan 29)
     - Finished SBIR review
     -	Some work on the JSPEC code to get a decent basis for the Python interface to be useful
     -	This was motivated by He's tech note that is currently being edited
     -	Tried to start working on EIC RF problems, but folks are reluctant to share prior material, particularly simulation code... Will 
       need to pester more
  Next (Feb 1 - Feb 12)
     - Edit the JSPEC tech note
     -	I am planning to redesign and document the JSPEC Python interface. Merge both projects into one, throwing C++ file i/o and run file parsing overboard and making all data 
       transparent through nparrays etc. Slightly restructure the class hierarchy such that it more readily exposes the important interfaces to the user.
     -	UITF optics work. We would like to obtain a model that is consistent with reality and hope to get there with iterative measurements and corrections. Due to lack of harps 
       in the keV beam line, measuring the emittance there may prove to be cumbersome but hopefully not impossible.

Fanglei Lin

  Previous two weeks (Jan 18 - Jan 29)
     - Continued the work on studying the dispersion effect of spin rotator solenoids on the electron polarization in the ESR and reported the preliminary results 
     -	Optimizing the optics of the dual energy storage ring cooler 
     -	Resumed the work on preparing teaching material for the USPAS 2021 summer section 
     -	Miscellaneous: attended the EIC eSR polarization meeting, attended the RCS Beam and Polarization Dynamics meeting, attended EIC design team meeting, attended the Storage Ring Cooler meeting, attended the EIC general meeting, attended the EIC hadron polarization meeting, attended the EIC Accelerator Design meeting, attended the Innovative HE Cooling Project Status meeting 
  Next two weeks (Feb 1 - Feb 12)
     - Work on electron polarization in the EIC 
     -	Work on the storage ring cooler project  
     -	Work on the teaching material for USPAS 2021 summer section 

Bhawin Dhital

   Previous two weeks (Feb 1 - Feb 12)
     - Completed all 6 tech notes. Ready to submit into JLab online system. Some of them are already submitted.
     - I was reading some tech notes and papers in HOM impedance measurements.
     - I was working on to �nd out the discrepancy in Touschek lifetime calculation in High Energy Ring section.
   Next two weeks (Feb 15 - Feb 26)
     - I will complete submitting all tech notes.
     - I will be working on to �nd out the discrepancy in Touschek lifetime in the high energy section of dual energy ring.
     - I will be working on beam dynamics study and further related topics in my research work.

Vasiliy Morozov

   Previous two weeks (Jan 18 - Jan 29)
     - Preparing and giving a presentation on the EIC polarization design at the CD1 review 
     - 2nd IR design: work on chromatic compensation of the hadron collider ring
     - Study of interplay of crabbing and coupling
     - Review of an SBIR Phase II  proposal
     - Proton polarization: study of polarization lifetime due to IBS
     - Submitted a polarization review paper to the Symmetry journal 
   Next two weeks (Feb 1 - Feb 12)
     - 2nd IR work: parameter optimization
     - Study of crabbing with coupling
     - Proton polarization: lifetime calculations
     - Electron polarization: beam spot size optimization

Amy Sy

   Previous two weeks (Jan 18 - Jan 29)
     - Preparation and submission of the LBNF/DUNE written report.
     - Working on Early Career Proposal on magnetized ion beam methods.
     - Tour of lab space including current setup of the sample detector in ARC L215, and the Wexx particle counter setup in the TED Vacuum Lab.
     - Discussions with R. Geng and M. Spata on perspectives on the particulate detector project.
     - Biweekly meeting with Omnisensing Photonics on detector prototype progress
   Next two weeks (Feb 1 - Feb 12)
     - Worked on Early Career Proposal on magnetized ion beam methods. At LEAF at IMP, simulations on decoupling the magnetized ion beam from a 45 GHz ECR ion source using a solenoid/anti-solenoid pair achieved a flat beam with emittance ratio 3:1, and initial RFQ transmission of ~95%. At FRIB, theory and simulation of an envelope model for DC, multi charge state ion beams that are angular momentum-dominated also demonstrated that the solenoid/anti-solenoid pair could easily focus the resultant beams into the aperture required for charge state selection. From these papers, the Early Career proposed method of using the round to flat beam transform + another, to-be-developed transform would likely not be an improvement in terms of real estate required for the total decoupling. Currently reevaluating the proposal and decided not to submit this cycle.
    - Completed Radworker I training.
    - Working on finding space for the particulate counter, as the current space with the detector group is no longer available.
    - Looking through the data from the benchtop tests of the particulate counter to understand the structure and format.
    - Biweekly meeting with Omnisensing Photonics on detector prototype progress.

Computational Physics - Yves Roblin
Yves Roblin

   Previous two weeks (Jan 18 - Jan 29)
     - CED import, requirements and procedural development
     -	ER@CEBAF
     -	FFA project
     -	BTeam coordination and meetings
     -	TRC commitee
     -	Review notes on spin lectures 
   Next two weeks (Feb 1 - Feb 12)
     - CED import, requirements and procedural development
     -	ER@CEBAF, looking at handling of chromatic effects for up/down transport
     -	FFA project meetings.
     -	BTeam coordination and meetings
     -	TRC commitee
     -	Review notes on spin lectures 
     -	Procedural development for Spreader/Recombiner setup
     -	Preparing for Hall A/C interface meeting
     -	Reviewing/assessing new Moeller beamline
     -	Preparing for UITF review

Randi Gamage

   Previous two weeks (Jan 18 - Jan 29)
     - t2nd IR integration to the full lattice for hadrons
     - Chromaicity correction for the HSR with two IRs 
     - Hall A beam line ptimization
     - Looking in to switch yard for CEBAF FF
   Next two weeks (Feb 1 - Feb 12)
     - Chromaticity correction for the HSR continue
     - hall A beam line reconfiguration tunability study
     - low energy optimization for the 1st IR with DFD and DDF configurations

River Huang

   Previous two weeks (Jan 18 - Jan 29)
     - We are working on study the image reconstruction of collision beams based on Poisson's solution of equation and trying to solve the retarded potentials based on results obtained in 1995 by R.A. Kruger.
     - We are also working on optimizing CASA Beam-Beam.
   Next two weeks (Feb 1 - Feb 12)
     - Continue working on CASA Beam-Beam.

Isurumali Neththikumara

   Previous two weeks (Jan 18 - Jan 29)
     - Completed creating 10-pass north linac files with 750 MeV energy gain per pass with different phase advances (900,1200,600)
     -	Compared OptiM and Elegant output for 600 FODO linac with 1.1 GeV gain. 
            - Elegant files were obtained from Dr. Roblin, and there’s a pretty good agreement in both results
            - But inj+NL file had deviations due to weak cavity-end focusing 
     -	Tried to write a conversion script from OptiM to Elegant, but it’s complicated, so decided to convert OptiM to Madx, then convert
       Madx to Elegant format.
   Next two weeks (Feb 1 - Feb 12)
     - Start writing the GA code.

Dennis Turner

   Previous two weeks (Jan 18 - Jan 29)
     - UITF
          - qsUtility, ced2elegant, cs2sdds tweaks for better use at UITF
          - Continue working on tool for importing elegant deck into UED
          - Provided phone support for emittance measurements
          - Work with UITF folks to characterize beam for HDIce, including tweaking the deck to better match reality.
     - AIPINJ
          - Attended "beam drivers" meeting to discuss commissioning plan
     - AI FOA
          - Literature search
          - Attended brainstorming meetings
     - OPS
          - Continued work on a draft aperture scan procedure
     - Attended 0800, Monday 1330, BTeam, Ops procedure, AI FOA meetings 
     - Attended AI Lunch Series, Radisasoft webinars, OWLE seminars     
   Next two weeks (Feb 1 - Feb 12)
     - UITF
         - Continue working with UITF folks with optics measurements
         - Adapting rayTrace for use at UITF.  I asked Matt for beam time to test.
         - Continue working on tool for importing elegant deck into UED
         - Provide phone support for emittance measurements
     - HLA
         - Resumed work on an emittance measurement tool using solenoids
     - Met with Stephen Webb from Radiasoft
     - AIPINJ
          - Found some mistakes in the CED optics; working on correcting them.
     - Attended BTeam, AI FOA, CASA, Ops procedure meetings
     - Attended AI Lunch Series

He Zhang

   Previous two weeks (Feb 1 - Feb 12)     
   Next two weeks (Feb 15 - Feb 26) 

Diagnostic Development - Kevin Jordan

Kevin Jordan

  Previous two weeks (Feb 1 - Feb 12)
  Next two weeks (Feb 15 - Feb 26)

Joe Gubeli

   Previous two weeks (Feb 1 - Feb 12)
     - Isotopes – Work on 50kW design
     - ARDDOT - Completed new design for the ARC 1 & ARC 2 SLMs. This design places the cameras over the dipole. With the dipole steel and a few 30% boron poly bricks we should be able reduce the radiation on the camera and have it last a little longer. Due to the low head clearance in the upper ARC a creative modification of a turning mirror was made that should allow for remote X&Y axis steering. Everything has been ordered except the 3mm slits and the borated poly shielding. Those should go on order today.
   Next two weeks (Feb 15 - Feb 26)
     - Isotopes – Work on the 50kW design
     - ARDDOT – Continue working on diagnostics upgrade to CEBAF (simulations, engineering and designs).  

Michael Tiefenback

   Previous two weeks (Feb 1 - Feb 12)
   Next two weeks (Feb 15 - Feb 26)

CASA Fellows
LERF - Steve Benson

   Previous two weeks (Feb 1 - Feb 12)
     - Reviewed  two SBIRs from DOE-NP.
     - Put together the budget for the Isotope quarterly.
     - Analyzed split linac compression scheme for uB CeC project
     - Put together  JLAMP II design study
     - Went over old CDR appendix looking for potential lethal flaws in the low energy cooler design. None found.
   Next two weeks (Feb 15 - Feb 26)
     - Attend the Wastewater irradiation ERR 
     - Edit and help submit tech note on JSPEC
     - Review some more papers
     - Rewrite and submit the LOSP for User Lab 4
     - Set up training for Drive Laser Enclosure LPSS
     - Derive specifications for JLAMP II

Andrew Hutton

   Previous two weeks (Feb 1 - Feb 12)
     - EIC: again, not much.  I need to find a topic I can get my teeth into.  That may have to wait until the JLab deliverables are defined.    
     - Isotopes:We continue to study the foil samples that were irradiated (led by Adam Stavola), and there are still discrepancies that we do not fully understand.  Our two NMT students, Geno and Robert, have received the data and are setting up a different software package to cross-compare.  In a phone call with our funding manager, Ethan Balkin, I learned that there will be two FOAs coming out this summer; I assume one for labs and a companion one for Universities.  This breaks the pattern of an FOA every two years, and thinking back on the Ethan’s careful wording, I think he has not awarded as many proposals as usual to provide funding for the intermediate year.  If so, we were only half-punished!  The Reviews were helpful and we will work on strengthening the proposal.  I have made a request to VCU to have their hot-cell transferred to us - I give it about a 25% probability, but I felt I should ask.  Drew offered us use of a lead-shielded room on the third floor of the ARC which is currently being used by Dillon, but will be vacated as part of the ARC refurbishment.  That would still leave us with a chemical separation problem, but one thing at a time.     
     - ERLsI have spent quite a lot of time developing spreadsheets showing the various aspects of an ERL and the projects that currently hold the record, the approved projects and which aspects they will push the limits, and the proposed project (PERLE) and what it would achieve.  In parallel, I am collecting up what LHeC would need to compare with the various records to identify gaps.  Of interest, the JLab FEL still holds the beam power record, CEBAF 1-turn has the energy record, and CEBAF 5-turn will have both the energy record and the number of turns record.  It may also have the record for highest current in a multi-turn ERL for a while.  Not bad for a lab that has turned its back on ERLs!       
   Next two weeks (Feb 15 - Feb 26)  
     - Isotopes:There has been considerable progress on understanding the results of the isotopically purified gallium.  The students at NMT, with the very active participation of Doug Wells who is a real expert at this, have re-analyzed all of the data.  They managed to show that some of the data is bogus and should be ejected; the rest agrees well with the results by Adam Stavola.  This work will continue over the next two weeks to include propagating the errors to get a final error estimate.  We are all feeling much more confident now!  We are waiting for the vacuum group to have time to remove the window for post mortem (actually we hope it isn’t dead!) as we should ship it back to ANL if it is still OK.      
     - ERLS:I have made great progress on the spreadsheet, requesting updates from all of the ERLs and already receiving replies from most.  I am now mulling over which are the key parameters that should be put on the 3rd tab of spreadsheet showing how we are, or will be, progressing towards verification of these key parameters.  For your reading pleasure, I am attaching the spreadsheet so far, comments on format and content are more than welcome.     
     - I have been approached by VCU Nuclear Engineering Group to participate in a request for student funding on Isotope studies.  The other collaborators are Virginia Union University (an HBCU) and Sweet Briar College (an all women’s university).  
     - I have also been on a videoconference with Achille Stocchi to try and unblock the French bureaucracy on the PERLE ICRADA.  All I get is that there is no problem, and a promised date (February 26) when we will have the PERLE Collaboration Meeting.  However, it is the French spring holiday season (usually devoted to skiing, but the ski resorts are all closed).  Getting anything out of French bureaucracy in a vacation period seems doomed to failure.  But we will see. . . . . 
     - I initiated an email chain on the availability of an American SRF cavity supplier, proposing that the Department of Energy, Office of Accelerator R&D and Production pay the upcoming projects (including the EIC) to buy American, including taking on some of the risk.  I see that there is now an RFI on this.