 Tue May 4 17:54:08 2021, Helmut Weick, Simulations, updated LISE file 
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This file really has the optics like used in the last ESR experiments.
Now the transmission is also a little bit better. |
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Tue May 4 18:25:31 2021, Helmut Weick, Simulations, cutting of primary beam
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The slits at TE4 and TE5 can be used to cut away the unwanted 78Kr beam (see pictures).
We do not want activation of the beamline. 78Kr35+ even has a chance of being injected. |
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Tue May 4 21:49:04 2021, Helmut Weick, Simulations, cut Brho by scrapers
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The dispersion from the production target into the ESR is not matched.
This is not good for momentum acceptance, but we anyway want to cut the acceptance.
Dispersion will oscillate with the tune of ESR. After 3 turns we expect a maximum dispersion.
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Thu May 6 00:32:57 2021, Helmut Weick, Simulations, GICOSY file for TE beamline and ESR
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This file has several options:
start in SIS, at TE3UF target or inside ESR, choose with GOTO LABEL (G L)after start system (S S).
Depending on the choice select different start beam parameters at top of file, others comment out.
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Thu May 6 13:26:56 2021, Helmut Weick, Detectors, TE5 profile grids do not work
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There are several issues.
1. The stepper motor drive does not react from Device-Control, -> check controller in FRS Messhütte
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Thu May 6 14:28:32 2021, Helmut Weick, Calibration, Be target thickness calibration -> 1839 mg/cm^2
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Injection was optimized before with Cu-40 mg/cm^2 stripper.
This reduces energy of 78Kr from 370 MeV/u -> 386.52 MeV/u.
To keep the same ESR injetion the SIS energy was raised with Be 10mm tatget.
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Fri May 7 01:07:27 2021, Helmut Weick, Analysis, maybe frequency ID
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We think we see the frequency range of A/q=2.25 at 243.1 MHz.
This would correspond to L=108.2m and E=386.4 MeV/u (gamma_t = 1.3955) at h = 126.
Path length is a bit short, for L=108.4m it should be 370.6 MeV/u.
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Fri May 7 03:44:55 2021, Helmut Weick, Accelerator, scraper optimisation
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Opened TE4 slits again to +/-10mm.
Then we tried different scrapers:
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Sat May 8 01:33:25 2021, Helmut Weick, Simulations, frequency list for 70Se setting
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EXCEL table with all possible fragments injected into ESR.
The path length in ESR, gamma_t and harmonic are adjusted to the 72Ge data.
Some lifetimes are limited but all intense lines are >30s in lab system.
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Sat May 8 01:43:23 2021, Helmut Weick, Accelerator, 70Se setting
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If gamma_t = 1.3955 Tm stays, we will need Brho = 6.21902 Tm for 70Se.
The corresponding ESR Brho setting will be a bit shifted.
It then requires E-SIS = 446.55 MeV/u to get 70Se to this Brho and gamma_t.
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Sat May 8 16:08:58 2021, Helmut Weick, Accelerator, beam position of Kr before ESR
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Checked beam positions in beamline before ESR,
they all look the same as before, with direct Kr beam.
Compare with old elog entry #.
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Thu Jun 24 22:05:11 2021, Helmut Weick, Accelerator, LISE files for 72Ge, 70Se, 52Mn settings
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This is just a Brho selection by the ESR based on SIS-energy used,
energy-loss in target with calibrated thickness and momentum spread by the reaction (Goldhaber formula).
Production cross sections are by EPAX 3.1 |
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Thu May 6 21:45:30 2021, Helmut, Detectors, beam position on TE5 grids
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The two grids do not work very well, one x position is opposite to the other.
But at least a guidance for the future, this was good injection of 78Kr with a thick Be target. |
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Thu May 6 22:05:30 2021, Helmut, Accelerator, Beamline and ESR data sets for 72Ge setting
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| parammodi exports, E-SIS = 441.0 MeV/u with Be-1840 mg/cm² target in, isoc. ESR, at least we see fragments |
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Sun May 9 23:32:24 2021, Helmut, Accelerator, parammodi saves 8x
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Here are parammodi saves for TE-line and ESR for all four fragment settings:
For the first run of 72Ge (7.May) I do not have files.
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Fri Jul 2 05:08:16 2021, Guy Leckenby (Canadian beaver team), Analysis, e143_analyser.py Summing Script
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I've written two scripts that others might find useful for the on-line analysis.
1. The first is a simple bash script that runs a for loop to run the e143_analyzer.py script for a sequence of start values (-s). You'll need to change
the increment and
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Fri May 7 07:02:33 2021, Guy Leckenby, Analysis, Online Monitoring Plots
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| In compliment to Liliana's plots, this is the summed spectra I calculated from 0338 to 0507. |
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Sun May 9 17:39:21 2021, Guy, Analysis, Comparison between 72Ge: 7th 19h vs 8th 21h
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Following Xiangcheng Chen's analysis, I analysed 11 ms time slices separated by 25 ms to see the evolution of the potential isomer across the injection.
Attachment 1: Data from May 7th 19h-20h. -t 11ms progression from -s=5 to -s=5.175
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Fri Jul 2 12:42:54 2021, Gregor, Analysis, Spectra 6:00-12:00 12x
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0.1s time slices for 245MHz and 410MHz, with e143_analyzer.py script
python $AnalyzerPath -s 0.$start -t 0.$time sparc-daq-02.gsi.de/E143-245MHz/245MHz-2021.07.02.$hour.* -o t_0.$start-0.$stop |
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Sat Jul 3 08:12:22 2021, Dima, Yuri, General, Beam stop
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We stopped the beam at 08:10
The latest recorded tdms files:
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