 Thu Jun 6 08:16:36 2024, Danyal, Accelerator, scraper info by Robert Boywitt 
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| attched is more info about the T-scrapers (E-cooler) by Robert Boywitt (Tel: 2067 or 3357) |
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Fri May 31 15:53:06 2024, Ruijiu Chen, DAQ, run NTCAP system
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NTCAP is working again.
Connect the RF cable and the scaler cables to NTCAP system.
The map of signal is recorded in following link.
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Thu Jun 6 07:54:15 2024, Danyal, General, pressure gauges and ion pumps
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yesterday (05.06.2024), firstly, the two ion pumps (underneath the fluorescence chamber) were switched off by the vacuum group (Björn Mai, Tel: 3438).
Secondly, the two pressure gauges (located near the target) were switched off. The pressure gauge at the fluo chamber is called E02VM3x and the pressure
was 5.5e-11 mbar. The other gauge is called IG2 and located further south, it measured 3.7e-11 mbar. That was when ion pumps were still switched on. |
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Fri Jun 7 17:10:45 2024, Sebastian, General, XUV LED
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| Maximum XUV LED Voltage: 6.5V |
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Fri May 31 16:49:52 2024, Carsten, DAQ, Wiring DAQ 1
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Started to Check the wiring.
Status as of 2024-05-31
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Tue Jun 11 21:38:35 2024, Julian, Imke, Rodolfo, Laser, Wavemeter HeNe long time stability
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The HeNe was running over night and the measured laser frequency of the wavemeter was logged, see picture.
A significant drift of around 300 MHz is visible during the night.
It is possible, that the laser lab got too cold during the night, as the pulsed laser was not running.
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Fri Jun 7 09:15:31 2024, Carsten, DAQ, Updated Channel List
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Mon Jun 10 09:17:38 2024, Carsten, DAQ, Updated Channel List
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Fri Jun 7 11:14:04 2024, Rodolfo, Laser, Trigger-signal for MRC
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We are using a 2-Channel Function Generator (from Textronik) to generate the trigger signal for the MRC Beam Stabilization.
The triggers are (according to the MRC nomenclature):
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Wed Jun 12 17:12:13 2024, Julian, Danyal, Rodolfo, Laser, Timing für 229Th89+
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We did the timing Ion-Beam Laser-beam time overlap.
The ion revolution frequency (and therefore the bunching frequency) is: 1.5429 MHz. |
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Thu Jun 6 09:23:53 2024, Konstantin Mohr, DAQ, Timing
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The best way to adjust the bunch-laser timing is to start go4 (mbs must be running) from atppc023. Therefore use x2goclient and use the predefined session
to access LXG1297. Start go4 as usual ([URL=https://elog.gsi.de/esr/E0052/10]Entry 10[/URL] + [URL=https://elog.gsi.de/esr/E0052/11]Entry 11[/URL]).
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Mon Jun 10 11:59:12 2024, Ruijiu Chen, Analysis, The ion identification of spectrum recorded on 2022
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| The simulated frequency is given in simulation_result.out. The yield is calculated by LISE file. The LISE file is attached here also. |
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Thu Jun 13 18:48:26 2024, Ruijiu Chen, David, Shahab, Yuri, Analysis, The ion identification of 229Th is correct.
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Harmonic: 124.0 , Bp: 7.796046 [Tm]
ion fre[Hz] yield [pps]
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Wed Jun 12 09:17:43 2024, Carsten, , Tests of background with ionization pumps on (from monday)
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On monday the ionization pumps were switch on to test the background, and if it is possible to run with the pumps switched on.
Results and comments, see below:
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Sat Jun 8 12:02:20 2024, Carsten, Detectors, Test Particle Detectors - Det South not working
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With the test beam from ESR I started to have a look at the PartDets.:
North outside: Works properly with a voltage of 1450 V
South outside (behind cooler) : no signal.
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Sat Jun 8 12:45:05 2024, Carsten, DAQ, Temporary change of RF signal
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The setting was 1.540974 MHz and division factor 68 (for a 200 MeV/u) beam, and the signal was taken from a signal generator.
I now switch to the "real" RF signal from the accelerator (~400MeV/u), that is 1.9693 MHz and the factor is set to 88.
This should be set back for laser tests or adjusted when we have the real decellerated beam. |
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Thu Jun 6 07:12:49 2024, Konstantin Mohr, Laser, T-Scraper 6x
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The T-Scrapers can be driven by DeviceControl, which must be started from a console. To do so, first open the app-launcher and then select "Device Control",
which is found under "Betrieb & Steuerung". Then select the appropriate context (should be the name of the experiment). After a short time the device icons
will be present. The scrapers can be found in the last four columns and the second last row (see screenshot 1). By default, they should be colored like |
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Thu Jun 13 10:06:35 2024, Constantine, Peter, Lukas, Jonas, Dounia, Carsten, Accelerator, Suspected Beam Troubles (is it really 229-Thorium?)
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From experience, the lifetime of the beam in the storage ring should be on the order of magnitude of hours, however, we observer beam lifetimes of the order
of 10ish minutes. This suggests either a beam loss mechanism, a totally wrong species or a combination of both.
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Fri Jun 7 15:29:50 2024, Rodolfo, Detectors, Stored beam @ ESR
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| One of the first PMT signals from the stored-ion beam @ ESR |
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Wed Jun 12 09:43:57 2024, Carsten, Accelerator, Stopped NTCAP at 9:43
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| Setup at ESR is carried on - stopped the long-time NTCAP run from overnight, |