 Sun Apr 10 08:53:26 2022, Kristian, Max, Laser, Timing verified
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timing is still good.
we checked the relative timing between laser and ions. the time difference between photodiodes, PMTs and particle detectors is still the same as original |
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Sun Apr 10 06:39:16 2022, Kristian, Marek, Max, Runs, runs morning shift 10.04.
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These are the measurement runs of the morning shift (10.04.).
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Sun Apr 10 06:34:49 2022, Kristian, Max, DAQ, Wavemeter Readout
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Problem solved. Ignore this entry
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Sun Apr 10 04:37:29 2022, Patrick, DAQ, Next wavelength range 
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Measurements with the next wavelength scan range should be started roughly around 12:00 noon. The plan is to go to lower wavelengths / higher energies.
So the next wavelength scan range would be 322.81 - 322.4 nm, again with a step size of 0.002 nm and 5s dwell time.
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Sun Apr 10 04:07:53 2022, Patrick, DAQ, go4 shows wrong frequencies and wavelengths
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[B]Update (ID:194):[/B] In labview "Stop All", close labview, stop python script (ID:197), close wavemeter. Then restart wavemeter, python script, labview
an mbs.
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Sun Apr 10 03:56:56 2022, V. Hannen, Detectors, Low rate in PMT South
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PMT south shows a much lower count rate than observed in elog entry 170.
Yesterday the voltage on this PMT was increased to 2400 V and the threshold setting of the CAEN CFD to 90 units, (from 70 units before) however the low |
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Sun Apr 10 02:20:17 2022, Patrick, DAQ, New mbs startup guide
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Connecting to the rfio server and opening a file is included in '@startup' now. Since mbs crashes reliably every 3 or 4 runs, it may be preferable to use
the following procedure (which did not crash yet):
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Sat Apr 9 19:50:40 2022, Carsten, , New thresholds for ADC of DAQ2 (starting with file0117)
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unsigned short caen_V785AH_threshold_mod0 [32] =
{0x0100 , 0x0004 , 0x0003 , 0x0004 , 0x0005 , 0x0004 , 0x0006 , 0x0005 ,
0x0006 , 0x0005 , 0x0100 , 0x0100 , 0x0100 , 0x0100 , 0x0100 , 0x0100 ,
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Sat Apr 9 19:09:57 2022, Rodolfo, Laser, Optimization - Resonator of dye laser
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I have tuned a bit the resonator of the dye laser.
The total output energy after the main amplifier is 86 mJ (@ 645,6 nm)
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Sat Apr 9 16:55:19 2022, Rodolfo, Laser,
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16:15 I have changed the dye (of both oscillator and amplifier).
16:27 I have increased the pump energy (@ 532 nm) from 476 mJ to 507 mJ.
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Sat Apr 9 15:47:21 2022, Carsten, Rodolfo, Sarper, Patrick, Runs, Afternoon and night shift runs
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After the morning shift, we got new increment (nm) for the laser scanning. We are now scanning 2 nm of wavelength range in 5 big steps (5 x 0.4 nm). Started
with 323.2 nm - 322.8 nm range. Every big step (0.4 nm) is scanned with 0.002 nm of wavelength increment.
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Sat Apr 9 14:15:44 2022, Kristian, Max, Konstantin, DAQ, Change in LV code
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We changed the LV code so that the Cobra Set Wavelength is permanently sent. Before it was only sent once at the beginning of each laser step. This, however,
lead to too much data for the LV->MBS server.
This was fixed by inserting a 250 ms wait in LV (in Krypton data VI). Basically, all LV values are now updated every 250 ms, which works fine with MBS |
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Sat Apr 9 13:45:42 2022, Max, Kristian, Runs, first scans with LV problem solved!
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This is the first time with LV buffer problem solved (see Elog ID: 184). Before the PMT signals were out of sync with the wavelength data!
We concluded to scan with step sizes of 0.002nm, scan range of 0.5nm (f
nm), dwelltime = 150(5s), loops = 2 (approx.: 30min measurements).
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Sat Apr 9 06:42:23 2022, Kristian, Laser, Laser step size
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| We changed the laser step size to 0.002 nm which corresponds to 5.75 GHz. |
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Sat Apr 9 06:25:22 2022, Max, Kristian, Runs, morning shift runs
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DAQ1: lxg1927:/data.local2/BeamTimeTh22/
DAQ2: lxg0155:/data.local2/E142/
LMD file name DAQ1:229Thor
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Sat Apr 9 05:26:25 2022, Patrick, Laser, Wavemeter
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| The wavemeter still shows large spikes from time to time. The exposure time is still at 34ms. |
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Sat Apr 9 05:00:11 2022, Carsten, General, Draft Docs and cheat sheet
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Please check the attached files,
and correct or enhance them.
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Sat Apr 9 04:40:01 2022, Patrick, DAQ, Bugged Trending plots?
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The problem from yesterday (ID:147) still persists. All the plots (not only the labview stuff) comes in too late in go4. However, the time axis is correct,
see picture. |
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Sat Apr 9 04:01:35 2022, Carsten, , 2nd DAQ
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Switched the CAEN TDC back on and changed the threshoolds for the ADC to:
unsigned short caen_V785AH_threshold_mod0 [32] =
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Sat Apr 9 03:57:10 2022, Carsten, Accelerator, New Cooler voltage after the crash of the cooler
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After the restart of the cooler the Ohmlabs divider showed a voltage 16V lower than before. This could also be seen as a slight shift in the Schottky lines
w.r.t to the bunching frequency and the marker. Corrected
the voltages at injection to DeltaU +3963V and in Sc 5/7 to + 3943V. Now perfect match with the old Schottky frequency.
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