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MUST2
SAMURAI_2018
S3-LEB-LPC
SUPERNEMO
MUGAST
EXPAND
SCALP
GALATRON
HiCARI
VELO
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Message ID: 5033
Entry time: Tue Jul 16 12:10:05 2019
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| Author: |
Francois |
| ExpNbr: |
e768s |
| Type: |
BEAM |
| Category: |
General |
| Status: |
Fixed |
| Target-Source: |
LiF |
| Subject: |
beam intensity, normalisation, elastic scattering 7Li |
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In 2005, the 15O1+ beam was measured at 6x10^7 pps after the CIME cyclotron, contaminated with ~nAe of 15N1+.
After stripper (aluminium stripper at LISE) the purity was 97 % of 15O8+ with 3 % of 15N8+.
The 15N(7Li,7Li)15N cross section has been measured at 27.3 MeV (18.6 MeV CM) (see images). It is Rutherford at angles <10° CM.
In the present experiment, the energy CM is 22.4 MeV CM.
10°CM correspond to 85° in lab, 7Li with energy ~ 0.46 MeV.
Conclusions:
- it is not possible to normalise to the Rutherford cross section of 7Li
- expected beam intensity at nominal should be > 10^7 pps (a factor less than 2 between 1+ and 3+, 40% of 8+ after stripper) |
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