Beam and Raster Checkout for A1n/d2n (Long Procedure)

Establish beam in the hall

 Goals 
 - Using "Target Out" location, tuned beam only, make sure beam reaches beam dump without hitting anything.

Beam checkout

 - The long procedure is a combination of the Short Procedure with Bull's eye scan.
 - Please consult RC or expert.

Bull's Eye Scan: BPM and Raster Calibration

Bull's Eye Scan Main Page Bull's Eye Scan: BPM vs Harp scan Calibration

 Goals
 We want to be able to correlate the BPM ADC data with the "absolute"
 positions given by the surveyed Harp scanners for these nominal BPM
 positions:
  (0, 0), (+2,+2), (+2,-2), (-2,+2), (-2,-2)

NOTE: The positions above can be experiment specific. Confirm with RC.

Procedure

Starting Settings
 Beam:           5uA CW,  Raster OFF
 Beam Position:  (0, 0)
 Target:         Carbon or 'No Target'
 Have a stripchart of the 3HO4A, 3HO4B, and 3HO4C BPMs visible.  [Run go_beam_stripchart, if needed.]

Start an HCLOG entry titled 'BPM calibration' and record the following for each of the 5 (x, y) points above

• Requested Beam Position
• HMS/SHMS Run numbers
• Harp Scan log entries

For each of the 5 points identified above, do the following

• We want all BPMs to have (roughly) the same values for each point (so the beam is roughly parallel to the beamline). Tolerances of +-0.3 or so on the requested numbers are fine.
• Be sure the BPMs and beam are stable, start a CODA in each arm for a few minutes, then call MCC and request that they run and log a harp scan for both 3H07A and 3H07B to the HCLOG.

Just leave the CODA run going during the scans.

Submit your HCLOG summary table

• Make sure your table is complete
• Add a screen snapshot of the BPM stripchart

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