September, 2019 Report - Sept 2 - Sept 27
Director - Todd Satogata
Previous two weeks (Sept 2 - Sept 13) - Served as Acting Accelerator Division Director (Sep 2-6) - Prepare/deliver CEBAF SAD safety meeting talk - Evaluate and provide input on JSA initiatives proposals - JLEIC pCDR development, updating figures and assembling work lists - JLEIC IBS evaluation meetings - Sarah Solomon/Xcelera SBIR work planning - Attend and participate in writing workshop, graduate student review - ODU PHYS854 teaching (with Geoff Krafft) - HOLIDAY: September 2 (Labor Day) Next two weeks (Sept 16 - Sept 27) - JLEIC pCDR finalization and final print! - JLEIC cooling and collaboration meet travel planning - OPS hall liaison planning and meeting - OPS discussions of CASA injector upgrade involvement - OPS prepare for KLF and Hall D collaboration meetings - ODU PHYS854 teaching (with Geoff Krafft) - Maybe take a vacation day here or there...
Previous two weeks (Sept 2 - Sept 13) - Handbook article on ERLs - ERL’19 talk on the LHeC ER - Semi-annual grad. student review - Machine support Next two weeks (Sept 16 - Sept 27) - Attending ERL’19 in Berlin - Vacation - PRAB paper review - Writing ERL’19 paper
Previous two weeks (Sept 2 - Sept 13) - 9/2: Labor day holiday - 9/3 - 9/5: Vacation - Impedance studies - Remotely participate ALS-U impedance meeting and discussions - CeC Review - Continue to read their report - Two day review 9/9, and 9/11 - Work with the review panel to write the review report - The close-out session finished on 9/13 Next two weeks (Sept 16 - Sept 27) - Discuss with Mike Blaskiewicz about beam-beam induced Landau damping on fast ion instability in JLEIC - Prepare slides for MCBI workshop and additional considerations for JLEIC collective effect studies - 9/21-29: travel to attend the MCBI workshop, present my talk on "MCBI in an EIC"
Previous two weeks (Sept 2 - Sept 13) - Attended NAPAC 2019. - Attended writing workshop organized by the Accelerator division, Jefferson Lab. - Studied missed lectures during the 1st week Next two weeks (Sept 16 - Sept 27) - Discuss the plan for the semester with Dr. Roblin on Tuesday the 17th
Previous two weeks (Sept 2 - Sept 13) - AI strategy meetings (web content, lunches, outreach, re-branding, etc.) - Wrote LHeC appendix on "ERL Developments" (including updated "ERL landscape" plot) - Prepping slides for contributions to the two 1-day workshops I'm attending before ICALEPCS (one on Jupyter notebooks the other on ML) - Was invited to (remotely) participate in the LBNL "AI for Science" session on Accelerator Science - Proofread various talks/papers that I am involved with (e.g. Adam Carpenter's ICALEPCS paper, Steve's multiple ERL talks) - AI webpage development - slowly coming along (https://www.jlab.org/AI/lunch_series) - Some work on using AI for state vector prediction in a detector Next two weeks (Sept 16 - Sept 27) - AI webpage development - slowly coming along (https://www.jlab.org/AI/lunch_series) - Some work on using AI for state vector prediction in a detector
Accelerator R & D - Yuhong Zhang
Previous two weeks (Sept 2 - Sept 13) - Attended NAPAC2019 conference and gave a talk on JLEIC design - Discovered a factor of four inflation of the JLEIC IBS rate and identified the sources of the problem Next two weeks (Sep 16 - Sept 27) - Continued to develop the 1st design of high energy DC cooler - Worked with Brahim for the EIC collaboration meeting organization
Previous two weeks (Sept 2 - Sept 13) - pCDR contributions - Technical writing workshop - Further explored beam parameters and design choices of the HV DC cooler - Looked at permanent magnets as an option for the acceleration section but am still in favor of solenoids Next two weeks (Sept 16 - Sept 27) - Start preparing the DC cooler concept for presentation at the cooling workshop - CST wakefield simulation of bellows impedances
Previous two weeks (Sept 2 - Sept 13) - Worked on the storage ring cooler project - Reviewed electron beam damping parameters with damping wigglers - Answered questions from the pCDR external reviewers - Miscellaneous: generated electron ring lattice without detector solenoid for beam study, attended JLEIC R&D meeting, attended Semi-annual Graduate Student Progress Review meeting, discussed introducing computation of DK depolarization rate using Zgoubi with Radiasoft collages, Next two weeks (Sept 16 - Sept 27) - Work on updating the interaction region design - Work on the storage ring cooler project - Prepare talks for cooling workshop and EIC collaboration meeting
Previous two weeks (Sept 2 - Sept 13) - Participating NAPAC2019 at Michigan Lansing for a week ( Aug 31 - Sept 06) - Working on Longitudinal dynamics in Two Energy Storage Ring. Next two weeks (Sept 16 - Sept 27) - Will be working on longitudinal dynamics and stability in two energy storage ring - Will be working on optimization of cooler parameters in two energy storage ring cooler
Previous two weeks (Aug 19 - Aug 30) - Finished updating the detector and ion complex chapters of the pCDR - Modeling of the IR for the short-range correlations (SRC) LDRD - Reviewing papers and posters for NAPAC19 - Preparation for and participation in the Zgoubi workshop - Preparation of a paper on the figure-8 concept - Work on the spin transparency experiment: spin tracking and meeting with collaborators - Preparation of a TRL document for EIC simulation tools Next two weeks (Sept 2 - Sept 13) - Work on the SRC LDRD - Spin tracking for the spin transparency experiment - Preparing for EINN2019 and PSTP2019
Previous two weeks (Sept 2 - Sept 13) - Continued H- linac optimization in TRACK. Working on optimization of second DTL tank with slightly lower voltage level. Baseline design has one voltage level for first and second DTL tanks, and a slightly lower level in DTL tank 3. Trying to improve on reduced emittance by lowering the voltage in DTL tank 2 and reoptimizing downstream quadrupoles and solenoids. - Working on PSTP2019 invited talk titled "Laser-driven polarized deuterium source". Next two weeks (Sept 2 - Sept 13) - Continued work on linac optimization for reduced transverse emittance. - Continued work PSTP2019 talk - Attending/presenting at PSTP2019 in Knoxville, Tennessee.
Computational Physics - Yves Roblin
Previous two weeks () - CEBAF: - JLEIC Next two weeks () -
Previous two weeks () - Next two weeks () -
Previous two weeks (Sept 2 - Sept 13) - Transparent Spin Mode using Zgoubi - In a principle scheme of RHIC snake (OPERA maps), two currents control the spin rotation angle and the spin rotation axis. By tracking three particles with orthogonal spins in Zgoubi, we determine the spin rotation angle and axis for a given set of snake currents again. The snake currents are then varied using a fitting procedure to adjust the snake axis to 0°. The evolutions of the spin components along the helical trajectories are obtained. The simulation indicates a full snake with a longitudinal axis: the radial and vertical spins flip while the longitudinal spin remains longitudinal. The closed orbits inside a snake for the 45∘ and 0∘ settings of its axis are obtained. Note the smaller closed orbit excursion for the 0∘ case. - Particle Tracking - We revised BB3D and CASA Beam-Beam. The updated BB3D can be used in particle tracking of a beam bunch for each turn and the updated CASA Bean-Beam can track the change in details of phase coordinates of a macro-particle for each collision. Next two weeks (Sept 16 - Sept 27) - Continue working on Transparent Spin project
Previous two weeks () - Next two weeks () -
Previous two weeks (Sept 2 - Sept 13) - Beam-beam effect - Finished debugging BB3D. I have make sure the revised code: 1. Load the map correctly, 2. Applied the map directly on particles correctly, and 3. Carried out symplectic tracking correctly. However, when running the simulation for a long time, I still see segmentation fault. What I found is this is because the coordinates of some particles became very large and it goes out of range when trying to put them on to grid. So this may not due to the code but some improper input parameters. The code has been sent to Yun and Ji for further test. - IBS calculation - Revised JSPEC to output IBS contribution from each individual element and the accumulated IBS element by element. Plotting the result for JLEIC using our lattice and using eRHIC lattice, it is clear to see there are three parts of our lattice that together contributes more than half of the IBS rate. Our arcs also contributes more than eRHIC respective parts. Another we have checked is the integral step in IBS calculation. I used linear interpolation to increase the data points so that the maximum integral step is no more than 0.1 m. We saw a difference of about 5%. So the step size is not the major issue of the large IBS rate. - NAPAC - Finished one paper Next two weeks (Sept 16 - Sept 27) - Finish the other NAPAC paper. - Cooling with eRHIC lattice and JLEIC parameters. - Start working on JSPEC benchmarking with Lanzhou experimental data.
Diagnostic Development - Kevin Jordan
Previous two weeks (Sept 2 - Sept 13) - I have been preparing for the IBIC conference and the Faraday Cup award for September 8 - 12, including the award poster and website update Next two weeks (Sept 16 - Sept 27) - Attended the IBIC Conference - Vacation
Previous two weeks (Sept 2 - Sept 13) - Short week with Monday being a holiday and Friday a travel day to IBIC. Will work some on preparing the Isotope crucible with gallium test shipment. The idea is to keep the gallium from freezing during transport. We will try using hand warms packed in the shipping container. It is the start of the month so I will be doing the monthly safety walkthrough as Safety Warden. The following week is the IBIC conference. Next two weeks (Sept 16 - Sept 27) - Attended IBIC Conference
Previous two weeks () - Next two weeks () -
LERF - Steve Benson
Previous two weeks (Sept 2 - Sept 13) - Explored the possibility of changing the venue for the no-deflection merger test - Completed talks for ERL 2019 - Finalized documentation for isotope ERR - Assist in Day of Caring activities on Friday the 13th - Set up offer to assist in hosting the ERL 2021 workshop at Cornell. - Set up laser training for CEBAF operators for Drive Laser Enclosure - Submitted NAPAC and FEL papers to the publications database - Remotely attended CBETA review on 9/11. Next two weeks (Sept 16 - Sept 27) - Attend ERL 2019 and present 3 invited talks - Discuss HZDR beam noise studies with Pavel Evtushenko - Complete preparations for Isotope ERR and attend it. - Submit proposal for change of SOW for the Cooling FOA for IMP work - Set up Working group 5 agenda for the Hadron Cooling Workshop at Fermilab.
Previous two weeks (Aug 19 - Aug 30) - Finished up editing the PreCDR-100, but I am sure it will be coming back at me! - On Friday, I met with Camille to give her some “insider” information on her new position. - More interestingly, I had a telephone conference with Doug Wells, our isotope collaborator, presently at New Mexico Tech. He has a follow-on patent being prepared on a new technique for producing radio-isotopes, which he would like us to demonstrate. His office sent us a non-disclosure agreement, but I have not heard back from Rhonda Scales if this is acceptable to JLab, so I don’t have the details. I suggested that he passed the basic concept by Ethan Balkin to find out whether this would be something that the DOE-ONP would support (financially, of course). I looked at the previous patent and it is really interesting, but it is a new way of producing isotopes that are already being produced by industry, so I am not sure that the DOE Isotope program will want to fund it (although they should). I will keep you informed. - I have also been preparing an introduction to the Isotope Program for the as-yet-unscheduled ERR. I am certain that they will need an introduction, but I don’t have a handle on the rest yet. We are having some difficulty with the isotope target approval, it needs a pressure vessel review which is going slow. But we will work through that. This afternoon, we are meeting to discuss the details of a transfer of unirradiated gallium to VCU via FedEx; lots of details to work through, e.g. does it stay liquid? If not, will it freeze and burst the crucible, etc? More fun than all of the bureaucratic hurdles we have to jump over. - I have been emailing back and forth collecting information on future NP projects world-wide for the AMICI conference mid-September. This will move to high priority in the next two weeks. I should probably give the talk at a CASA meeting when I get back. Next two weeks (Sept 2 - Sept 13) - Vacation: 6 days