 Thu May 6 17:48:48 2021, W. Korten, Helmut, General, ESR setting for 72Ge ions with primary beam
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Setting the 78Kr (after the target) to the Brho of the 72Ge beam at 368.4 MeV/u (gamma=1.3955), i.e. 6.79575 Tm, which leads to an energy of 392.93 (of
78Kr).
With the 10mm Be target the beam energy should then be 467.8 MeV/u .
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Thu May 6 17:02:49 2021, Ragan, Rui-Jiu, DAQ, Scaler signals and parameters of NTCAP 
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| At the moment, we record 7 signals in scaler channels and one Schottky signal (245 MHz resonance cavity) in the NTCAP with the attached information. |
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Thu May 6 16:45:42 2021, Ragan, Rui-Jiu, DAQ, Data taking with NTCAP
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NTCAP is on and data taking has started.
On time: 16:39
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Thu May 6 14:30:23 2021, W. Korten, General, Target thickness
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Thickness of the Carbon target in the TE line has been measured by centering the primary 78Kr beam in the ESR:
Beam energy 370 MeV/u, with thin stripper, ESR energy 368.65 MeV
Adjust beam with "thick" target to keep ESR energy at 368.65 MeV/u -> Beam energy 445 MeV/u
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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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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 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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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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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 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 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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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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Fri Apr 23 13:47:55 2021, Jan Glorius, Collaboration, experiment proposal
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