BCM calibration (d2n)

BCM run list

Strategy

• Use special run to calibrate OL02 cavity against Faraday cup
• Calibrate EPICS bcm variable by calibrating BCMs against OL02
• Calibrate BB/LHRS scalers against OL02

Key for BcmLog files

Column headings for BCM log file (from Vince via Kalyan):

• Entry #
• BCM 1 voltage (upstream BCM)
• BCM 2 voltage (downstream BCM)
• Unser (not used)
• Faraday Cup (if extracted = 0)
• 0L02 (injector reading)
• 0R07 (not used)

Relevant HALOG entries

• Feb 17 BCM cal data:
  • HALOG: 0-25 uA run
  • HALOG: 30 uA run
  • HALOG: BCM strip chart during calibration

• Halog 263768 02/27/09 23:15 Kalyan BCM calibration : 0L02 vs BCM1 and BCM2
  • Halog 263890 02/28/09 16:52 Kalyan BCM calibration : OLO2 vs Left HRS scaler
  • Halog 264176 03/02/09 11:18 Kalyan Re: BCM Calibration: BCM1 and 2 vs 0L02 -- new plot

Useful Documents

• Explanatory page from PVDIS experiment
• Vince Sulkosky's tech note
• Mark Jones's tech note: Media:Jones_bcm.pdf‎