PPB - September 7, 2022

• On-site => Wednesdays @ 11am EDT in TL-2236
• Zoom => https://jlab-org.zoomgov.com/j/1609550529?pwd=RlNJYytUSk1tbzNJeUIxNUptTk9UzQT09&from=addon

New Topics

• e+ source transmission with 7cm and 3.5cm apertures
• updates from the gang
• what we want to do in FY23
  • PPB - Feb 2, 2022 - Positron Beams Working Group Meeting
  • Joe - Houston, we have a plan! media:210202_Positron.pptx

Old Topics

• Sami - evaluate e+ yield and final momentum as a function of capture linac parameters (gradient phase aperture) File:QWT 08 31 – Copie – Copie.pptx
• 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)
• 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

Shareas

• • CUE: /group/positron
  • Wiki: https://wiki.jlab.org/ciswiki/index.php/Polarized_Positron_Beams_for_CEBAF
  • Sharepoint: https://jeffersonlab-my.sharepoint.com/:f:/r/personal/grames_jlab_org/Documents/Positron?csf=1&web=1&e=2awBwR