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MUST2
SAMURAI_2018
S3-LEB-LPC
SUPERNEMO
MUGAST
EXPAND
SCALP
GALATRON
HiCARI
VELO
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 Mon Jul 22 16:54:33 2019, Marlène, Franck, François & Nicolas, e768s, BEAM, General, Fixed, , Cheking beam transmission from G1 profiler to VAMOS
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 Tue Jul 23 14:33:03 2019, Marlène, Yorick, Faïrouz & Nicolas, e768s, BEAM, General, Fixed, , Cheking beam transmission from G1 profiler to VAMOS 
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Message ID: 5264
Entry time: Mon Jul 22 16:54:33 2019
Reply to this: 5287
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| Author: |
Marlène, Franck, François & Nicolas |
| ExpNbr: |
e768s |
| Type: |
BEAM |
| Category: |
General |
| Status: |
Fixed |
| Target-Source: |
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| Subject: |
Cheking beam transmission from G1 profiler to VAMOS |
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Goal:
Estimate beam transmission from profiler to VAMOS (FP)
Method:
1. Beam intensity is reduced with the pepper pot 1/9 and by closing slits after the 15O target production and the accelerators so that the beam quality (emittance, etc...) is not affected.
2. VAMOS plate is removed to allow the direct beam detection
3. LiF (1.25 mg/cm2, number 1) is in position
Results:
1. beam intensity at G1 profiler ~ 4e4 pps
2. VAMOS FP ~ 2e4 pps
Discussion:
1. There is a factor of two loss between the profiler and VAMOS. Taken this factor into account in the g-ray yield estimate (see post ..) the numbers of 1297- and 1340-keV g-rays is in line with what is expected from cross-section calculation.
2. Loosing a factor of two means a substantial amount of 15O is implanted in the pipe/target frame/MUST2 masks. A dedicated AGATA activation measurement could be performed to cross-check this factor of two. |