Difference between revisions of "5-pass optics for A1n"
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- SHMS setting: 30. deg, momentum: -2.0 GeV/c | - SHMS setting: 30. deg, momentum: -2.0 GeV/c | ||
- Target: Carbon Optics | - Target: Carbon Optics | ||
| − | - Trigger: | + | - Trigger: 3/4 trigger in both arms |
- Collimators: HMS (Sieve), SHMS (Centered Sieve) | - Collimators: HMS (Sieve), SHMS (Centered Sieve) | ||
Latest revision as of 18:43, 13 February 2020
Goals - To calibrate angle and ytar reconstruction of HMS/SHMS spectrometers. - Time: estimate 8 hours of 40uA beam total.
Setup - Beam Current: 40 uA CW, 0.5mm raster - HMS setting: 30. deg, momentum: -2.0 GeV/c - SHMS setting: 30. deg, momentum: -2.0 GeV/c - Target: Carbon Optics - Trigger: 3/4 trigger in both arms - Collimators: HMS (Sieve), SHMS (Centered Sieve)
Procedure - Assume that the beam center checkout is complete. - Set HMS/SHMS magnets to -2.0 GeV/c and they are at 30 deg. - Insert HMS Sieve and SHMS Centered Sieve. - Insert Carbon Optics target - Ask for 40uA and 0.5mm raster size. - Take one hour runs. - At 40uA need 8 hours*40uA = 1.1C of beam.
