 Thu Jul 1 23:46:17 2021, Iris, General, Less beam after gas bottle change? 
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| Looks like there is a bit less beam now in the ring. I just looked at one spectra from before the gas bottle change and after... |
 Thu Jul 1 23:54:43 2021, Iris, General, Less beam after gas bottle change?
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No, everything okay! Must have had a very good earlier run to compare.
> Looks like there is a bit less beam now in the ring. I just looked at one spectra from before the gas bottle change and after... |
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Fri Jul 2 00:08:22 2021, IK, Kanika, DAQ, NTCAP status
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The latest recorded tdms files:
p:\E143\sc\SC_2021-06-30_23-27-45\0000338
p:\E143\iq\IQ_2021-06-30_23-27-34\0001651
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Fri Jul 2 04:58:39 2021, IK, Kanika, DAQ, NTCAP status
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The latest recorded tdms files:
p:\E143\sc\SC_2021-06-30_23-27-45\0000405
p:\E143\iq\IQ_2021-06-30_23-27-34\0001978
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Thu Jul 1 23:07:47 2021, IK, KK, Runs, source
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The change of the source happens now |
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Thu Jul 1 23:38:55 2021, IK, KK, Runs, Change of gas bottle
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| The gas bottle has been changed and the beam is back. |
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Fri Jul 2 01:39:51 2021, IK, KK, Runs, drop of intensity
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We see a drop in beam intensity from 7E9 to 2E8 between 01:30 and 01:43 |
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Fri Jul 2 01:43:56 2021, IK, KK, DAQ, NTCAP status
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The latest recorded tdms files:
p:\E143\sc\SC_2021-06-30_23-27-45\0000360
p:\E143\iq\IQ_2021-06-30_23-27-34\0001759
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Fri Jul 2 03:10:03 2021, IK, KK, Runs, drop of intensity
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We see that intensity stabalized at 9E8 which is smaller then before.
We neticed this at 2:50, keep observing. |
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Fri Jul 2 03:19:49 2021, IK, KK, Runs, drop of intensity
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And the intensity is back again to 5E9 at 03:20 |
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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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Sun May 9 18:50:23 2021, Helmut, Wolfram, Yuri, Accelerator, changed to 70Se
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18:45 changed SIS, ESR setting for 70Se without predrilling blind change.
E-SIS = 446.55 MeV/u, is centerd as before on TE3UF target grid.
set beamline after taret as 78Kr 36+ E = 337.375 MeV/u
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Sun May 9 21:29:26 2021, Helmut, Wolfram, Yuri, Accelerator, target TE3UF shift
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We see a very strong line at the left end of spectrum, stronger than all other lines.
When we shift the target TE3UF_H from -35mm to -37mm it gete weaker, but -37mm is the end of drive.
In the other direction it becomes worse. At -25mm completely new peaks.
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Sun May 9 22:31:23 2021, Helmut, Wolfram, Yuri, Accelerator, change to 72Ge
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we change back to 72Ge
just change SIS-energy E = 441.0 MeV/u
beamline energy after target E = 392.9 MeV/u
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Sun May 9 23:24:49 2021, Helmut, Wolfram, Yuri, Accelerator, scraper optmisation for 72Ge
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We tried the scrapers a bit, because right of peak some background appeared.
The GE01DS_HI shows a strange effect,
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Sun May 9 01:49:25 2021, Helmut, Sergey, Yuri, Accelerator, change to 52Mn
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It was done in steps:
isochronous 52Mn should come at Brho = 6.28239 Tm (gamma_t = 1.3955).
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Tue Jun 29 20:13:58 2021, Helmut, Sergey, Yuri, Accelerator, change to predrilling an 72Ge
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After optimisation of sextupoles we found a scraper position which makes a narrow peak and keeps 20% of the injected beam.
GEEXDS2HA = +2.0 mm (out is +130mm)
GE01DS_HI = -75 mm (out is -130mm)
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Sat May 8 21:08:13 2021, Helmut, Sergey, Shahab, Wolfram, Yuri, Accelerator, optimisation of sextuples
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| The optimisation of sextuples is finished. Record a few files. |
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Sun May 9 01:19:47 2021, Helmut, Sergey, Accelerator, scraper optmisation for 72Ge
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To improve the isochronicity still in the 72Ge setting sextupoles and scrapers wer varies successfully.
1. E02DS_H -130 / 130mm - wide rect. peak
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Wed Apr 28 09:36:39 2021, Helmut Weick, Simulations, LISE file for fragments from TE3UF into ESR
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Uncooled beam on target at TE3UF with dispersion and slit in TE beamlne and realistic injection into ESR.
Now tuned for 72Ge but can easily be modified to other fragment settings.
The target thickness may need adjustemet after measurement.
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