 Wed Jun 30 08:59:37 2021, Yuri, Accelerator, 70Se setting
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X(9Be)=1.815 g/cm2 (adjusted in primary beam setting)
Gamma_t=1.3956
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Wed Jun 30 09:04:50 2021, Yuri, Markus, Accelerator, Status
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1) Over night the source was conservated. It is being restarted now.
2) The approximated amount of Gas in this bottle shall allow for running until tomorrow morning (~24 h). There is still another bottle in reserve (1 l)
and one reserve from GANIL (0.5 l).
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Wed Jun 30 13:57:14 2021, Yuri, Sergey, Accelerator, sextupoles + scraper positions 
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After setting up on 70Se
Sextupoles were adjusted to optimize the resolution of the 70Se peak. Set values are in the ESR logbook.
The SIS energy was shifted up to increase the number of 70Se.
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Thu Jul 1 07:28:55 2021, Jan, Akash, Accelerator, Beam intensity
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| Intensity went up from 5e8 to 1e9 extracted particles from SIS. |
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Thu Jul 1 14:47:15 2021, Yury, Helmut, Accelerator, added high Brho scrapers
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So far only scrapers for low Brho were used:
GE01DS_HI = -58mm (arc from inside) and
GEEXDS2HA = -11.2 (straight from outside)
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Fri Jul 2 11:44:25 2021, Helmut, Yuri, Accelerator, move scrapers to see effect on unknown lines
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We close the arc inside and straight section inside scrapers to narrow and cut the 70Se line.
Then look what the other lines left of 70Se will do.
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Fri Jul 2 12:18:35 2021, Pavlos, Alexandre, Accelerator, e-cooling
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Sergey Litvinov will now try to setup the e-cooler to cool the beam in the ESR.
The data taking has been stopped (except the NTCAP). |
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Fri Jul 2 13:10:00 2021, Yuri, Accelerator, Scrapers
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| 12:46 moved the TOF detector scraper back to -11 mm |
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Fri Jul 2 13:44:50 2021, Sergey, et al, Accelerator, El cooler
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| Up to now, attempts to cool the fat line between Se and Ar were conducted. We give up it now and remove cooling |
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Fri Jul 2 16:14:17 2021, Yuri, Accelerator, Scrapers 4 72Br
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Starting 15:15
The scrapers are moved very much close to each other to eliminate all background particles and leaving basically single ions injected for 72Br. Do not
wonder, this means that also many empty files are created.
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Fri Jul 2 20:33:44 2021, Yuri, Accelerator, 70Se setting with closed scrapers
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We tune back to 70Se.
The scrapers stay closed at EEXDS2HA=0 mm, EEXDS1HG=+5 mm
"Single"-particle run |