PPB - October 25, 2022
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Coordinates
- On-site => Wednesdays @ 11am EDT in TL-2236
- Zoom => https://jlab-org.zoomgov.com/j/1609550529?pwd=RlNJYytUSk1tbzNJeUIxNUptTk9UzQT09&from=addon
Agenda
- All - comments/reactions from those attending Yoshinori's KEKB e+ presentation on Monday
- Joe - JLab e-/e+ topics for U.S.-Japan Science and Technology Cooperation Program in High Energy Physics
- Joe - couple slides request for CLAS12/Hall B collaboration meeting (11/4)
- Sami - QWT collection with cavities
- All - AOB
Last week's Agenda
- Joe - near (prototype) and long (cebaf) term plan updates
- Andriy arrives next week!
- I meet w/ Thia, Patrizia, Doug, Andrei to discuss a) physics resources and b) beam functionality for e+ program
- Developing POC's to develop refined e+ budget estimate in ~4 months (tentatively I set the date at Feb 3)
- gun
- e- injector
- SRF for e- and e+
- target, magnet, RF collection, compression
- radiation/shielding
- transport optics
- spin transport, wien, rotators
- bi-polar power supplies
- diagnostics
- controls, safety
- CLAS invited a presentation in ~3 weeks (11/1 or 11/4) on status and perspectives of e+ at CEBAF
- high level plan, using LERF
- last year's LDRD estimates
- this year's work plan (something like above)
- Reza - electron injector design status
- Yves - 123 MeV e+ transport status
- Eric - users' update
- Older Topics
- Sami - evaluate e+ yield and final momentum as a function of capture linac parameters (gradient phase aperture) media:Chicane_with_Andriy_s_model_week_5.pdf
- Yves - begin working on injection/extraction lines from linacs
- Dennis - update LERF to SL transport line to agree better with the FML costing geometry
- Alicia - solicited for emission parameters for GPT, building model of Gun through QCM (desired matchpoint)
- Carlos - evaluate gun voltage and electrode gap for 60 deg and E profiles vs. gap (compared to as built magnetic profile) Media:Existing Wien capabilities for LERF gun voltage Carlos' slides REVISED.pptx
- S&A will plan to measure LERF relative to CEBAF and cryo points for Joe, Kelly will add FML layout to CEBAF and provide Joe Gubeli points for CEBAF
- Joe Gubeli - would like elegant lines when available, can show them in LERF model
- Joe/Fanglei/Amy - exchange ideas/options for e+ spin rotator inside LERF
- Joe - prototype experiment planning media:220831_LERF_injectors.pptx
Reminders
Workshop on Polarized Sources Targets and Polarimetry (PSTP22) - Mainz, Germany, Sept 26-29 2022 [1]
- J. Grames, "Spin Polarized Positron Beam Upgrade for Jefferson Lab", Abstract