 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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Sun May 9 13:53:07 2021, Yuri, Wolfram, Andrew, Liliana, Calibration, Change of energy: Back as before
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After looking at the spectrum it was concluded that the same isotopes, and no more, could be identified.
Now we change the energy back to 441.7 MeV/u and will open the scrappers to see if Mn comes in.
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Sat May 8 17:29:54 2021, Yuri, Sergey, Wolfram, Michael, Shahab, Runs, recording Kr decay measurement on NTCAP
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Uc = 250mA
decay Kr 78, 476 MeV/u
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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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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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Thu May 6 21:26:02 2021, Yuri et al., Accelerator, Energies
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gamma_t = 1.3955
Br(72Ge) corresponds to 6.79575 Tm
E (Kr) at Br(72Ge) = 392.9 MeV/u
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Tue May 4 13:26:40 2021, Yuri, Simulations, Expected spectrum 72Ge
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A Z M/q Int difference in kHz@245MHz
68 30 2.263614752 35 -933.1
70 31 2.255131564 124 -457.0
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Fri May 7 09:56:43 2021, Yuri, Calibration, Identification Verification
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With closed scrapers there are only a few weak lines.
Open temporarily all scrapers in the ESR to write down the frequencies. |
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Fri May 7 09:58:04 2021, Yuri, Accelerator, Setting up KO extraction for Caves
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| SIS optimisation requires us to stop. Only sporadic shots. |
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Fri May 7 10:05:06 2021, Yuri, Accelerator, E02DS3HG does not drive
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| E02DS3HG stays at -35 mm and does not react |
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Fri May 7 10:46:40 2021, Yuri, Accelerator, GE02DS3HG
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| The scraper is blocked at -10 mm and -unfortunately- blocks the beam in the ESR. Uli Popp is taking care. |
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Fri May 7 14:06:02 2021, Yuri, Accelerator, SIS kicker failure
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Fri May 7 16:09:50 2021, Yuri, Accelerator, Stop, change of sextuple settings
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Sat May 8 11:42:21 2021, Yuri, Accelerator, KPs
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EO1KP03 was on = -44.9 A
E01KP05 was off, now is on = 3.67 A
The beam is on the right frequency, but the width is still very broad. |
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Sun May 9 14:19:44 2021, Yuri, Accelerator, Spectrum
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We accept larger m/q values than we like to. m/q(low) cut ~ 2.08. Decrease ESR energy from 369.2 -> 368.4 MeV/u
frequencies shifted by -37.5 kHz (at 60 MHz) |
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Fri Jun 25 21:47:24 2021, Yuri, Analysis, Identification
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Attached are two files with a proposed particle identification.
Different colors indicate different harmonic numbers |
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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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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 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 |