1. Summary of Working Group 1
Design and Beam Physics
Todd Satogata
CASA
Accelerator Division
JLEIC Collaboration Meeting April 1-3, 2019

2. Working Group 1: Design and Beam Physics
Time
Title (Weds AM Session)
Presenter
10:30
Correction of Magnet Errors and DA of JLEIC Collider Rings
Yuri Nosochkov
10:50
Update on Alternate Design of JLEIC Ion Injector
Brahim Mustapha
11:10
Update on JLEIC Ion Polarization and Spin Transparency Experiment
River Huang
11:30
RHIC Spin Transparency Experiment Capabilities
Haixin Huang
11:50
Accurate Spin Tracking on Modern Computing Architectures for Electron-Ion Colliders
Dan Abell
12:10
Discussions
All
Wednesday AM parallel session
35-40 participants
Including Jianwei Qiu on BlueJeans
Two talks on machine design activities
Three talks on polarization and spin plans
Including JLab/BNL FOA-supported spin transparency experiment planning

3. Correction of Magnet Errors and DA (Y. Nosochkov)
Former electron collider ring design
Including emittance (cf. Christoph question)
New design: Lower strength sextupoles, higher DA?
Analysis includes misalignment, strength systematics and randoms, corresponding corrections
Error basis: PEP-2 design study
Conservative error set
Tracking simulations with LEGO
Synchrotron oscillations, higher order fringes included
Final focus quad errors studied in low beta
Off-momentum DA ~8sp (sp=4.6e-4)
Vertical DA optimization (injection) vs horizontal (polarization lifetime)

4. Correction of Magnet Errors and DA (Y. Nosochkov)

5. Update on JLEIC Injector Alternate Design (B. Mustapha)
Motivations: potential cost mitigation, upgrade paths
Compact, lower-energy linac (higher voltage)
Racetrack/compact ring booster
Consideration of electron ring as high energy booster (with fully stripped ions)
Requires superconducting quadrupoles with current baseline lattice
Designed new lattice starting from requirements of room temp mangets for ion booster; will retrofit as ion ring
Some considerations already adopted in JLEIC 100 GeV upgrade
e.g. shorter 150 MeV linac
High energy large booster requires higher energy injection (3 GeV->5 GeV) for Pb space charge (slide 10)

6. Update on JLEIC Injector Alternate Design (B. Mustapha)

7. Reviewed figure-8 spin design of JLEIC
Update on JLEIC Ion Polarization and Spin Transparency Experiment (R. Huang)
Reviewed figure-8 spin design of JLEIC
Including spin rotators, polarization control above 100 GeV
Spin response function
Evaluation of RHIC technical capabilities for spin transparency experiment
Experimental scenarios to measure spin resonance strengths

8. Update on JLEIC Ion Polarization and Spin Transparency Experiment (R
Update on JLEIC Ion Polarization and Spin Transparency Experiment (R. Huang)

9. RHIC Spin Transparency Experiment (H. Huang)
FOA-supported JLab/BNL collaboration
Summary of RHIC capabilities
Including spin flipper for measuring spin tunes
Baseline against spin tracking (e.g. Zgoubi)
RHIC spin tune half-integer vs experiment/figure-8 spin tune integer

10. Spin Tracking and Zgoubi Update (D. Abell)
Work performed under Phase II SBIR
Improving Zgoubi performance and usability
Considerable optimization discussion
(Ask Dan for his Cremona map code story)

11. Spin Tracking and Zgoubi Update (D. Abell)