Difference between revisions of "Beam Position on Target"
From Hall A Wiki
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* Check vertical beam position on target by centering X' (θ<sub>tg</sub>) from the central sieve-slit hole. | * Check vertical beam position on target by centering X' (θ<sub>tg</sub>) from the central sieve-slit hole. | ||
* Horizontal target scan (LH2, dummy): | * Horizontal target scan (LH2, dummy): | ||
| + | <ol> | ||
| + | <li> 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. | ||
| + | <li> Scan beam to find edges of the dummy target. | ||
| + | </ol> | ||
Latest revision as of 13:55, 14 October 2014
- Check vertical beam position on target by centering X' (θtg) from the central sieve-slit hole.
- Horizontal target scan (LH2, dummy):
- 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.
- Scan beam to find edges of the dummy target.
