Difference between revisions of "20170310-JleicIonIntegration"

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* Involved cross-check between spreadsheet and esme
 
* Involved cross-check between spreadsheet and esme
 
* [http://www.toddsatogata.net/JLEIC/2017-03-10-JleicBunchFormation.pptx slides are here]
 
* [http://www.toddsatogata.net/JLEIC/2017-03-10-JleicBunchFormation.pptx slides are here]
 +
* Will set up meeting to discuss RF constraints with Jiquan/Shaoheng
  
 
==== Beam Parameter Spreadsheet ====
 
==== Beam Parameter Spreadsheet ====
−
* Todd continues to develop a [http://www.toddsatogata.net/JLEIC/JLEICBeamParameters.xlsx draft beam parameters spreadsheet] ([http://www.toddsatogata.net/JLEIC/JLEICBeamParameters.pdf pdf]), including input parameters and derived parameters, and a rough start at some instability thresholds
+
* Todd continues to develop a [http://www.toddsatogata.net/JLEIC/JLEICBeamParameters.xlsx draft beam parameters spreadsheet] ([http://www.toddsatogata.net/JLEIC/JLEICBeamParameters.pdf pdf]), including input parameters and derived parameters
−
* Note that these are explicitly '''beam''' parameters, (mostly) not accelerator hardware parameters (e.g. lattices, instrumentation, etc)
+
** Have added rough start at some instability thresholds, verified longitudinal parameter calculations vs esme
 +
** Some items (particularly space charge calculation) need to be revisited to agree with Jiquan's calculations
 +
** Note that these are explicitly '''beam''' parameters, (mostly) not accelerator hardware parameters (e.g. lattices, instrumentation, etc)
 
** Will move forward with reorganizing beam/lattice parameters area in coming weeks
 
** Will move forward with reorganizing beam/lattice parameters area in coming weeks
 
* Three goals:
 
* Three goals:
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==== R&D Items: Ion Integration ====
 
==== R&D Items: Ion Integration ====
 
* Bunch formation (Jiquan, Todd, Randy; Ed, Vasiliy)
 
* Bunch formation (Jiquan, Todd, Randy; Ed, Vasiliy)
−
** Most pressing immediate need is to characterize bunch formation plan through Booster and Collider rings
+
** See above update
−
** All beams start as coasting beams at Booster injection, so no major impact from ion source/ion linac parameters
+
** Randy is assisting Todd with esme calculations; will cross-validate with BLonD (CERN python longitudinal code)
−
* Ion source (Amy) / Linac (Todd/Brahim) / LtB / Booster injection (Ed)
+
* Booster injection (Ed)
−
** Linac cost
+
** Ed has reviewed literature, is resurrecting Synergia work
−
** Pulsed ion QWR/HWR gradients and RF control
+
** Update in two weeks?
−
** Booster space charge control
+
* Linac (Brahim; Todd, Ed, Amy)
−
** Booster injection design
+
** Brahim is evaluating tradeoffs of H+ vs H- beam transport
−
** Transverse/longitudinal emittance budget vs DC cooling
+
** Reported at Mar 2 R&D meeting; further report at collaboration meeting
−
** Polarization
+
** Existing modeling is good enough to use for beam parameters for Booster injection
 
* Booster extraction (Ed/Todd?) / Booster to Collider (Todd, Yves?) / Collider injection (Vasiliy?)
 
* Booster extraction (Ed/Todd?) / Booster to Collider (Todd, Yves?) / Collider injection (Vasiliy?)
 
** Bucket to bucket synchro/cogging?
 
** Bucket to bucket synchro/cogging?

Revision as of 14:17, 10 March 2017

Mar 10 2017 JLEIC Ion Integration Meeting (and Notes)

Agenda being developed

Bunch Formation Progress

  • Todd has started evaluating bunch formation proposals from Jiquan
  • Spreadsheet and simulation (esme) progress
  • Involved cross-check between spreadsheet and esme
  • slides are here
  • Will set up meeting to discuss RF constraints with Jiquan/Shaoheng

Beam Parameter Spreadsheet

  • Todd continues to develop a draft beam parameters spreadsheet (pdf), including input parameters and derived parameters
    • Have added rough start at some instability thresholds, verified longitudinal parameter calculations vs esme
    • Some items (particularly space charge calculation) need to be revisited to agree with Jiquan's calculations
    • Note that these are explicitly beam parameters, (mostly) not accelerator hardware parameters (e.g. lattices, instrumentation, etc)
    • Will move forward with reorganizing beam/lattice parameters area in coming weeks
  • Three goals:
    • Ensure consistency of design beam parameters at matchpoints between JLEIC machines
    • Provide input to impedance and instability calculations, and broader beam simulation effort
    • Serve as a machine-by-machine beam parameter reference for the eventual CDR

R&D Items: Ion Integration

  • Bunch formation (Jiquan, Todd, Randy; Ed, Vasiliy)
    • See above update
    • Randy is assisting Todd with esme calculations; will cross-validate with BLonD (CERN python longitudinal code)
  • Booster injection (Ed)
    • Ed has reviewed literature, is resurrecting Synergia work
    • Update in two weeks?
  • Linac (Brahim; Todd, Ed, Amy)
    • Brahim is evaluating tradeoffs of H+ vs H- beam transport
    • Reported at Mar 2 R&D meeting; further report at collaboration meeting
    • Existing modeling is good enough to use for beam parameters for Booster injection
  • Booster extraction (Ed/Todd?) / Booster to Collider (Todd, Yves?) / Collider injection (Vasiliy?)
  • Coordination with other groups
    • Beam cooling (Steve Benson et al.: Booster DC, Collider)
    • Instability/impedance (Rui Li et al.)

Reference Materials

Attendance

  • TBD
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