Beam Position on Target

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  • Check vertical beam position on target by centering X' (θtg) from the central sieve-slit hole.
  • Horizontal target scan (LH2, dummy):
  1. With the liquid hydrogen target, move beam from 'nominal' center by -5mm, -2.5 mm, 0 mm, 2.5 mm, 5 mm and take 200k events.
  2. Scan beam to find edges of the dummy target.
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