AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Tue Nov 29 19:07:35 2016
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<p>The main experiment changed to a carbon reaction target at F8 (similar thickness of CH2 previously used), and retuned the ZDS. First BigRIPS run after retuning is 40Mg_1093 (at 2:29 am, Nov 30th)</p> <p>The background at F11 has increased. The neutron backgroun incresead by a factor of ~10. The rates of visual scalers also increased; for example Si Top/Bottom from about 50 Hz to 300 Hz (see attachment 1).</p> <p>One possible explanation are higher light particle rate at F11. By comparing the PID for C target (attachment 2) with that of CH2 target setting (e.g. https://elog.ph.ed.ac.uk/AIDA/492), it looks like the new conditions have a higher transmission for A/Q=3 fragments (3H et al). Also, in the new setting the Si isotopes are also transmitted to F11.</p> <p>The implantation depth is still good; same as we had for C target at F8 (compare 40Al distribution in attachment 3 with what we had before).</p>
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Attachment 1:
visual_scal_4am_Cin_F7.png
Original size: 808x749
Attachment 2:
pid_r1093.png
Original size: 1018x659
Attachment 3:
imp_ch2.png
Original size: 900x950
Attachment 4:
pid_ch2.png
Original size: 900x700
Attachment 5:
hits_ch2.png
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