 Wed May 11 14:59:01 2022, Rodolfo, Laser, Laser status
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I have measured the output energy of the laser system. All values in [mJ] and over 500 laser-pulses average
[TABLE border="1"]
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Wed May 11 18:00:40 2022, Wilfried, Phillip, Max, Detectors, double PD NO peak problem solved
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In entry 36 one finds an additional PD NO peak around bin 100.
This was caused by signal reflection in the cable.
The problem was solved by adjusting the CFD threshold from 10 to 30.
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Wed May 11 18:13:04 2022, Wilfried, Phillip, Max, DAQ, laser scan/step complete
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The scaler channel laser scan complete and laser step complete is interchanged in go4. Carsten will fix this on the software side.
Additionally the laser scan complete signal was not there in the first place. After checking the signal on multiple points, the signal was suddenly back
in the DAQ.
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Wed May 11 20:47:54 2022, Zoran, Accelerator, beam lost in SIS
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For some reason the beam was lost in the SIS soon after taking the ESR beam this evening, reason unknown. Solved by sending teh full context to the SIS
machine and having
operators to manually set the voltage of the SIS extraction kicker. Afterwards a slight readjustment of the transfer beamline was necessary:
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Wed May 11 22:04:30 2022, Phillip, Wilfried, Max, General, spacial laser - ion overlap verified
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After the SIS/ESR optimization we checked the spatial overlap with the T-scrapers again.
The values are:
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Wed May 11 22:19:17 2022, Max, Wilfried, Volker, Laser, laser bunch timing 
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We overlapped the laser and ion bunch in the time domain. The delay has to be set on the module above the laser and NOT in the ESR Messhütte!
The values are:
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Wed May 11 22:45:22 2022, Max, Wilfried, Patrick, General, scanning wavelength
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The scan parameters for the next shift are:
in COBRACONTROL:
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Wed May 11 23:34:39 2022, Patrick, Carsten, Detectors, Particle Detectors / Scraper positions
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Voltages of particle detectors off.
Scraper positions:
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Wed May 11 23:36:24 2022, Ruijiu Chen, Carsten, Guy, DAQ, start NTCAP.
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Carrier frequency:244MHz
IQ rate: 10M Samples/seconds
Reference level: -25
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Thu May 12 00:16:13 2022, Patrick, Volker, Guy, Rui-Jiu, Runs, Runs night shift
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[TABLE border="1"]
Time | SIS-intensity | ESR-intensity after orbit change| cooler-HV | LMD-DAQ2 file nr | LMD-DAQ1 file nr | scan range(nm) | step width increment (nm) | |
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Thu May 12 03:25:37 2022, Patrick, DAQ, Laser scan complete signal off
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As in ID:46, the 'laser scan complete' again is not coming in.
It is not very useful to repeatedly fix cable contact problems.
Therefore, Carsten is adding a 'number of steps' line to the config file to "repeat" the x-axis. |
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Thu May 12 10:10:35 2022, Simon, Christopher, Wilfried, Sebastian, DAQ, 1ms gated PMT north / middle added to DAQ
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We added on DAQ1 and DAQ2 1ms gated PMT North and PMT Middle signals.
Now we "supress" the signal by a factor of ~30.
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Thu May 12 10:21:30 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, No Beam
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| There is no beam in the ESR due to some problem in the UNILAC. |
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Thu May 12 11:30:18 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, Beam is back
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| Beam is back in the ESR. |
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Thu May 12 11:31:11 2022, Simon, Christopher, Shahab, Wilfried, Sebastian, Ragan, General, Runs morning shift
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[TABLE border="1"]
Time | SIS-intensity | ESR-intensity after orbit change| cooler-HV | LMD-DAQ2 file nr | LMD-DAQ1 file nr | scan range(nm) | step width increment (nm) | |
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Thu May 12 12:02:56 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, No beam
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| There is no beam in the ESR again. |
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Thu May 12 12:51:30 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, Beam is back
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12:50 Beam is back again in the ring.
12:52-until now Kicker problem in the ESR. |
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Thu May 12 14:04:09 2022, Konstantin, DAQ, Go4 Laserstep histograms adapted
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In order to correctly display the gated PMT signals [I]PMT Middle[/I] and [I]PMT North[/I] some modifications in the Go4 code were necessary. Affected files
are [I]TLdaAnlProc.cxx[/I], [I]TLdaAnlProc.h[/I] and [I]TLdaInputDescription.h[/I].
Modifications are indicated according to the scheme "[B]//-- HH:MM mm-dd-yyyy: <description>[/B]" (an example is given in the attached screenshot). They |
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Thu May 12 15:21:23 2022, Sebastian, Simon, Laser, Flash lamps changed
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We (Sebastian and I) changed the flash lamps of the Quanta Ray Laser and measured the output energy of the laser system afterwards (still during warm up).
All values in [mJ] and over 500 laser-pulses average
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Thu May 12 15:34:47 2022, Max, Kristian, Sebastian, DAQ, laser scan, laser step and laser busy checked
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We checked all three signals in the Messhütte. Laser scan and laser step are OK.
The Laser busy signal is for large increments (0.1nm) also fine. For short increments like our usual 0.005nm increment the signal is irregularly.
Likely the laser busy status is too short. |