View source for Bull's Eye Scan

'''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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