BPM calibration information

• 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 (still under construction)

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
  • Dec. 1, 2017
  • Jan. 10, 2018
  • Feb. 7, 2019
  • July 17, 2020
  • Aug. 17, 2021
  • May 31, 2022