- 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 |
- |
- |
- |
- |
- |
- |
|
- Summary of survey information
3/7/2017 !! -2.84 !! -2.88 !! -3.27 !! -0.21 !! -0.20 !! 0.05 !! -2.88 !! -3.07 !! -0.13 !! -0.04 !!
12/1/2017 !! -0.01 !! -0.01 !! -0.17 !! -0.27 !! -0.22 !! -0.16 !! 0.01 !! -0.12 !! -0.12 !! 0.02 !!
1/10/2018 !! - !! - !! - !! - !! - !! - !! 0.01 !! 0.11 !! -0.12 !! 0.08 !! Harps only after wire repair
| Date |
BPM AXoff |
BPM BXoff |
BPM CXoff |
BPM AYoff |
BPM BYoff |
BPM CYoff |
Harp AXoff |
Harp BXoff |
Harp AYoff |
Harp BYoff |
Notes
|
