Difference between revisions of "BPM calibration information"
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* Summary of survey information | * Summary of survey information | ||
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! Date !! BPM AXoff !! BPM BXoff !! BPM CXoff !! BPM AYoff !! BPM BYoff !! BPM CYoff !! Harp AXoff !! Harp BXoff !! Harp AYoff !! Harp BYoff !! Notes | ! Date !! BPM AXoff !! BPM BXoff !! BPM CXoff !! BPM AYoff !! BPM BYoff !! BPM CYoff !! Harp AXoff !! Harp BXoff !! Harp AYoff !! Harp BYoff !! Notes | ||
Revision as of 07:01, 8 May 2023
- The beam position monitors (BPMs) on the diagnostic girder in Hall C (IPM3H07A, IPM3H07B, and IPM3H07C) are calibrated by comparison with the Hall C superharps (IHA3H07A and IHA3H07B). Ideally, a "bulls-eye" scan is done which allows one to determine the BPM offsets and slopes. However, a single harp scan is sufficient to check the BPM offsets.
- If re-analyzing/revisiting BPM calibrations, make sure that the appropriate survey offsets are loaded into the harp analyzer tool
- Table of BPM calibration information. Offsets and slopes are from the "RAW" epics variables (no survey offsets applied).
| Date | Method | AXoff | BXoff | CXoff | AYoff | BYoff | CYoff | AXslope | BXslope | CXslope | AYslope | BYslope | CYslope | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/13/2018 | Calibration | -0.06 | 0.07 | -1.06 | -0.46 | 0.12 | 0.61 | -0.98 | -1.12 | -0.96 | 0.97 | 1.17 | 0.87 | 1st calibration |
| 8/29/2018 | Harp scan | 0.15 | 0.29 | -1.08 | -0.12 | 0.63 | 1.09 | - | - | - | - | - | - | - |
| 2/9/2019 | Harp scan | 0.25 | 0.46 | -1.01 | -0.08 | -0.04 | -0.11 | - | - | - | - | - | - | Radiator installed during January 2019 SAD |
| 6/23/2019 | Calibration | 0.11 | 0.17 | -1.07 | -0.40 | -0.18 | -0.40 | -0.97 | -1.11 | -0.95 | 0.95 | 1.15 | 0.85 | - |
| 12/8/2019 | Calibration | 0.14 | 0.22 | -1.13 | -0.06 | -0.29 | -0.78 | -0.96 | -1.09 | -0.96 | 0.95 | 1.16 | 0.85 | Polarized 3He running |
| 9/5/2021 | Harp scan | -0.35 | 0.17 | -0.83 | -0.35 | 0.19 | 0.47 | - | - | - | - | - | - | |
| 1/9/2022 | Harp scan | -0.08 | 0.32 | -0.67 | -0.40 | 0.20 | 0.43 | - | - | - | - | - | - | |
| 6/9/2022 | Harp scan | 0.16 | -0.22 | -0.54 | -0.18 | 0.02 | 0.39 | - | - | - | - | - | - | |
| 1/11/2023 | Harp scan | 0.06 | -0.35 | -0.69 | -0.20 | -0.03 | 0.38 | - | - | - | - | - | - |
- Beamline surveys
- Summary of survey information
| Date | BPM AXoff | BPM BXoff | BPM CXoff | BPM AYoff | BPM BYoff | BPM CYoff | Harp AXoff | Harp BXoff | Harp AYoff | Harp BYoff | Notes |
|---|
