BLTWG Meeting 02/16/2022

Time: 3:00 EST
JLab meeting room: none
Connecting: detailed instructions are here
- web browser: connect using zoomgov
- phone: 833 568 8864 US Toll-free
meeting ID: 161 038 5436
passcode: 097756

Announcements
Accelerator update -- Edith
- What can be done to improve the peak fits in the harp scan gui, find better uncertainties?
- Is there some means to determine the transverse x and y emittances in the Hall D beamline?
- What would be required to get a 1cm x 1cm beam spot raster at the photon collimator?
Polarimetry
- TPOL polarimetry update -- Michael
- polarimetry from pair production -- Andrew
- progress on CBSA calculations -- Glasgow group
- polarimetry from hadron decays -- Alexander A.
  - PSigma, ψ₀ for all batches but 02
  - Comparison with TPOL results for batch 05-08
  - Flux-normalized yield: problem for Summer (batches 09-12)?
Photon beam simulations
- CPP beam simulations -- Richard
PS and tagger calibration -- Sasha
Photon beam systematics
- tagging accidentals scaling factors -- Beni
- luminosity and flux normalization
- updates to ccdb energy_calib for earlier run periods
- reminder of Task Force: plan for writeup of current systematics
  - photon beam systematics overview -- Richard
Diamond radiators
- X-ray rocking curve measurements at CLS in December, 2022 -- Richard
  - JD80-1
  - JD80-200
  - JD80-210
  - JD80-220
- Next steps in radiator fabrication -- Richard
- Next steps for radiator X-ray assessment -- Richard
- other topics?
Evaluating status of Hall D hardware and electronics (Feb 2022)
Any other business

Longevity and Aging Report for beamline detector systems

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