Latest revision as of 13:22, 16 June 2017

Jun 16 2017 JLEIC Ion Integration Meeting

JLEIC Documentation Discussion

• Todd, Mike, Yuhong, Walt Akers, and Rik Yoshida had a JLEIC documentation meeting earlier this morning
• Discussion items included
  • Some inconsistencies observed in recent high-level tables in JLEIC DocDB
  • Plans for JLEIC tech note consolidation in JLEIC DocDB, philosophy of use
  • Update on JLEIC subversion repository
  • JLEIC parameter documentation, review/release guidance

Collider Ring Harmonic Numbers (Jiquan)

• Jiquan has produced a draft tech note Variation of JLEIC RF Parameters due to Synchronization Requirements
• Contains narrative and top-level RF parameters for collider rings at ion KE=100 GeV
• Can be used as a live document/reference, with parameters updated as collider ring circumferences are updated
• Suggest that it be reviewed and go into JLEIC DocDB for version 1 as is, and linked from CASA parameter wiki pages
• Then distribute to relevant parties (Andrew Hutton/Andrew Dotson, Todd/Randy, Vasiliy/Fanglei, ...).

Polarized Source / ANL (Amy)

• Amy/Zack (ANL): First telecon held Wed Jun 14 15:00
  • Amy, Fulvia, Ed, Yuhong, Slava, Todd, James Maxwell (JLab); Zack/Brahim (ANL); Vadim Dudnikov (Muons, listened in)
  • ANL looking for technical feedback on ABPIS (resonant charge exchange ionizer) -- is this appropriate technology?
  • ANL have Cesium sources available, some modest funds in near-term for design/costing of APBIS as input to their EBIS, and polarimetry
  • Polarized light ion source needs are common for JLab/BNL proposals
  • Amy suggested an SBIR with ANL/Muons/JLab as a path forward
• ANL visit (Todd, Tue Jul 11)
  • Coordinating visit, meeting plan with Brahim/Zack
  • Brahim: summer student extending linac to high energy
  • Linac lattice baseline/parameter area to be shared via Dropbox, reflected in JLEIC Baseline Parameters wiki
  • Linac/Booster optimal Pb charge state (67+?) (see previous meeting)

Booster Ramping

• Todd has started a tech note on the Booster ramp parameters

Linac/Booster Pb Charge State

• ANL has mostly been simulating/optimizing the low energy linac (c.f. HB'16 talk/paper by Ostroumov)
  • This affects charge state and stripping optimization, but does not affect latest optimizations to handle RFQ heavy ion losses
  • Heavy ion source expected to have 1-2 pi mm-mrad normalized emittance; which is it?
• Brahim has noted that 67+ may not be the optimal charge state for the baseline high energy linac
• Brahim and Todd are continuing to discuss
  • Tradeoff of space charge vs stripping efficiency/pulse intensity
  • Todd's initial feeling is that this is a relatively flat optimization