 Fri Jul 30 10:21:27 2021, Rodolfo, Laser, Kink 
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The laser beamline in the ESR north arc has a [B]knik[/B], therefore the laser beam can not get the "laser tower" in the north east arc. This path is used
to get the laser beam up to the electron-cooler side, such that the laser beam co-propagates the ion beam.
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Fri Apr 22 09:38:24 2022, Rodolfo, Laser, getting ready for Fluorescein548
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We are going to change dye. Therefore I have take out the DCM-dye-solution* out of the dye circulators, rinsed them with Ethanol (5 times) and put new filters.
* This was a solution of 0.3 g/l in 1:1 solvent mixture of Ethanol and DMSO. |
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Mon Apr 25 18:47:12 2022, Rodolfo, Laser, New dye circulators
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I have put into operation the new circulators (SN. 182231, 182201) for our dye laser (the Cobra). I have rinsed them with pure Ethanol first and I have
not seen any leaks.
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Mon Apr 25 21:47:28 2022, Rodolfo, Laser, green instead UV
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I am exchanging the optical elements (mirrors and lenses) for the laser spectroscopy on bismuth. At some places I am also exchanging the 3"-mirror holders
and installing 2"-mirror holders instead.
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Tue Apr 26 16:28:14 2022, Carsten, DAQ, Cable of Bunch HF disconnected and 1.995Mhz signal connected for DAQ tests
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| see subject. |
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Tue Apr 26 18:15:19 2022, Rodolfo, Detectors, XUV-Detector and Cu-Mirror
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Concerning the moveable detectors:
- I have switched off the power supply and cooling (heat exchanger) for the Cu-mirror.
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Fri Apr 29 21:18:12 2022, Rodolfo & Max, Laser, Fluorescein 27, Rh 610 + Rh 640
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We (Max and Rodolfo) have tested the dyes. I have prepared the dye-solutions according to the recipes given in Sirah's User Manual.
The seed energy for the Cobra was 520 mJ @ 532 nm. The output energy after the Cobra's main amplifier was:
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Wed May 4 22:45:12 2022, Carsten, Sebastian, DAQ, Q-Switch Signal (ch15) fixed
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The "dead" Q-Switch signal was converted
two times... This explains why in the
Thorium experiment the Q-Switch signal
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Wed May 4 22:55:37 2022, Rodolfo, Sebastian, Laser, FCU / Temp Control Bug
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We found a "Bug" in the control of the Sirah dye system.
Due that we don't use the FCU and the temperature control unit we could not start the Sirah software without getting numerous errors.
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Wed May 4 22:56:22 2022, Rodolfo, Sebastian, Konstantin, Laser, Laser step complete, scan complete fixed
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"Laser step complete" and "laser scan complete" are working again.
Problems:
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Thu May 5 15:24:34 2022, Sebastian, Laser, laser busy problem
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Current status:
Laser busy signal works correctly (5V if the grating moves, 0V if not) if the laser is operated by the Sirah software.
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Fri May 6 10:30:23 2022, Sebastian, DAQ, laser busy / dye out signal fixed
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Solution for a working laser busy / dye out signal was to disable the FCU and set the FCU status to "False" (see attached picture).
Remark: FCU unit will not be used for Bismuth experiment! |
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Fri May 6 10:35:06 2022, Sebastian, DAQ, laser step complete cabling changed
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I changed the laser step complete cabling from a quad coinc (see attached picture) to a Logic Fan In / Fan out (same as laser scan complete).
The "detour" through the quad coinc yielded to a very short laser step complete signal of ~500ns...
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Fri May 6 16:29:03 2022, Simon, Patrick, Detectors, PMT preparation
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We changed PMT north and PMT south and tested them at 1500 V.
Both new PMTs are broadband.
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Fri May 6 16:41:57 2022, Patrick, Rodolfo, Laser, Wavemeter
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We coupled the laser through a multi-mode fiber into the wavemeter.
With the main amplifier enabled, we got enough power behind the fiber (0.5 - 1.5 mW) to use the wavemeter with 34 ms exposure time (1s / 30Hz to prevent
jumps in the wavemeter readout).
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Mon May 9 09:43:08 2022, Zoran, Accelerator, ESR Beam
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The main control room started setting up the Bi beam this morning, but quickly stopped in order to solve some problems around the UNILAC. Therefore we
should not plan to receive ions earlier than late in the evening on Monday, or probably Tuesday during the day. |
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Mon May 9 11:45:57 2022, Wilfried, Jon, Sebastian, General, HV Divider position & DMM calibration
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We performed an autocalibration (attached picture 1) of the Keysight 34465A DMM (TUD Keysight).
The position and the "cabling" to the cooler platform was also adjusted (picture 2,3). |
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Mon May 9 13:48:20 2022, Rodolfo, Laser, Laser for H-like 209Bi
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I have changed the dye to Rhodamin 610 + Rhodamin 640. The Cobra wavelength can be tuned now from 600 to 630 nm.
The current wavelength is set to 605 nm. |
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Mon May 9 16:58:41 2022, Carsten, Detectors, Voltage particle dectectors NA_SZ und SA_SZ switched on
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Voltage SA_SZ (capture behind cooler): 1500 V (thin plastic scintillator)
Voltage NA_SZ (capture behind target): 750V (thick plastic, short absorption length)
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Mon May 9 17:01:02 2022, Carsten, DAQ, directories / paths / comments / reduction factors /startup.scom files for the 2 DAQs
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[U][B]DAQ1 (original):[/B][/U]
-user atplaser
-runs on lxg1050
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Mon May 9 17:14:02 2022, Carsten, DAQ, NTCAP DAQ
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The NTCap DAQ computer in the HKR (Schottky logbook) is started, and all preparations for data taking (mounting of NAS etc.) are done.
Parameters for NTCAP DAQ will be adjusted as soon as beam is available. |
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Mon May 9 17:16:34 2022, Carsten, Accelerator, Important: New ESR pattern - requies action for XUV detector in/out
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The ESR pattern is enhanced compared to the thorium experiment by additional machines that can be used for cooling/waiting in order to optimize 208Bi yield.
As a consequence, the sub chain numbers (previous: virtuelle Beschleuniger) are changed. The new numbers still have to be dialed in into the devices in
the Messhütte and the automatic in/out of the XUV-detector tested- |
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Mon May 9 19:05:17 2022, Wilfried, DAQ, Q-Switch signals + 0.5 ms and +1 ms in VUPROM
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We have generated two additional signals which are fed into two VUPROM channels:
Q-Switch + 0.5 ms --> channel 9
Q-Switch + 1.0 ms --> channel 10
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Mon May 9 19:56:41 2022, Zoran, Accelerator, status Monday evening
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The main control room is setting up the SIS for extraction. At the moment there are 2.5E8 particles in the SIS. Later they will check the transport and
the devices for the
ESR injection. The ESR operators might (! no info available) take over later in the evening, but there will definitely be no beam for the experiment before |
 Tue May 10 09:05:19 2022, Zoran, Accelerator, status Monday evening
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> The main control room is setting up the SIS for extraction. At the moment there are 2.5E8 particles in the SIS. Later they will check the transport
and the devices for the
> ESR injection. The ESR operators might (! no info available) take over later in the evening, but there will definitely be no beam for the experiment |
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Tue May 10 11:40:55 2022, Sebastian, Accelerator, still no beam @ESR
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There is still no Beam in the ESR.
The beam is currently at TE3 - between SIS and ESR |
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Tue May 10 11:59:45 2022, Simon, Christopher, Kristian, Sebastian, Laser, Labview VI checkups
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The lower limit (to position) of the Cobra control VI has to be one increment smaller.
This means for moving from 601,95 to 601,74 the "to position" has to be 601.735.
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Tue May 10 15:26:35 2022, Rodolfo, Max, Laser, Laser stabilisation running
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It is now possible to stabilize and move the laser with both stages.
The software and hardware settings are attached.
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Tue May 10 20:35:42 2022, Phillip, Wilfried, Max, Detectors, PMT Threshold
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Since we have ions in the ring now, we looked at the PMT thresholds and the widths. In order to do so we looked at the Raw Signal directly before the CFD
and its output simultaneously. You can now set the threshold just above the noise. If the threshold is too low you will also see flat lines in the oscilloscope
when triggered on the CFD output. New values:
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Tue May 10 21:41:17 2022, Rodolfo, Accelerator, T-Scraper
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| The T-Scrapers at the electron cooler have an issue. They can't be moved in the horizontal direction using the DeviceControl. |
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Tue May 10 22:29:45 2022, Jan Glorius, DAQ, DAQ2 shaper settings
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| Attached are the MSCF shaper settings applied on Tue May 10 at 22:30. |
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Tue May 10 22:37:10 2022, Jan Glorius, DAQ, DAQ2 cabling docu
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| |
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Tue May 10 23:10:25 2022, Sebastian, Patrick, Volker, Guy, Accelerator, T-Scraper Reloaded
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We have established a Control to "manually" move the T-Scrapers via a "remote desktop". We can now move both scrapers in the horizontal direction too.
We are now T-scraping the ion beam for determining its position in the vertical and horizontal directions. |
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Tue May 10 23:53:42 2022, Rodolfo, General, shift change
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| The night shift took over. They are trying now to overlap the ion and laser beams. |
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Wed May 11 01:09:07 2022, Patrick, Sebastian, Volker, Guy, Laser, Beam overlap
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We overlapped the laser with the ion beam.
The ion beam positions are:
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Wed May 11 03:10:55 2022, Patrick, Sebastian, Volker, Guy , Laser, Laser - bunch timing
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We added the delay and gate generator in between the bunch trigger and the CFD to move the timing of the PMT middle signal relative to the photodiodes north
and south.
The center value of PD-North is at 19 bins, PD-South at 55 bins, the middle is therefore at 37 bins. The PMT peak should be half a revolution, ie 75 bins |
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Wed May 11 06:41:32 2022, Simon, Christopher, Shahab, Runs, shifts
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| new shift started. |
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Wed May 11 06:47:58 2022, Simon, Christopher, Shahab, Runs, restart laser scan
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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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Wed May 11 07:28:39 2022, Simon, Christopher, Shahab, General, DAQ Loop for shifters
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Procedure:
- Scanning phase ends (on LabView wait until "Idle Status" blinks. it will show e.g. 8 loops and 44 scans)
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Wed May 11 03:17:14 2022, Patrick, Volker, Guy , Runs, Start laser scanning
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Runs of the night shift. The wavelength range is 601.95 - 601.735 nm.
We started the wavemeter python script on atppc023 located in Desktop/wavemeter_Bi.
We changed the wavelength range in go4 to the actual scan range.
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Wed May 11 08:01:44 2022, Zoran, Runs, Start laser scanning
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[quote]
[I]Questions:[/I]
[B]There are many other masses/isotopes/etc. visible in the Shottky spectrum. Is this wanted?[/B]
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Wed May 11 14:48:31 2022, Konstantin, DAQ, Voltage range of the Keysight DMM changed from 10V to 1V
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During the setup of the ion beam the voltage range of the Keysight DMM was changed from 10V to 1V. Additionally, the name of the high-voltage divider was
adjusted (this changes only the filename of the file, which is stored at the local pc decpc003). |
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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. |
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Thu May 12 15:50:33 2022, Max, Accelerator, No ESR beam
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Since 13:30 we have no beam in the ESR. There is a problem with the ESR septum.
The magnets department is investigating. |
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Thu May 12 16:35:17 2022, Max, Wilfried, Zoran, Accelerator, NO BEAM UNTIL TOMORROW MORNING
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The problem at the ESR septum is serious. They have to remove the broken part and try to repair it.
Maybe tomorrow in the morning briefing there will be more information about this.
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Fri May 13 08:32:41 2022, Zoran, Accelerator, NO BEAM UNTIL TOMORROW MORNING
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> The problem at the ESR septum is serious. They have to remove the broken part and try to repair it.
> Maybe tomorrow in the morning briefing there will be more information about this.
>
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Fri May 13 11:46:51 2022, Sebastian, Simon, , Laser energy
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We (Sebastian and I) measured the output energy of the laser system again.
All values in [mJ] and over 500 laser-pulses average
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Fri May 13 16:55:58 2022, Danyal, Carsten, Phillip, Wilfried, General, End of E128 Beamtime
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Dear all,
unfortunately, the E128 experiment must now come to an early end.
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Mon May 16 14:20:05 2022, Ragan, Danyal, Carsten, Phillip, Wilfried et al., General, E128 Beamtime
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> Dear all,
>
> unfortunately, the E128 experiment must now come to an early end.
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Mon May 16 15:57:37 2022, Rodolfo, Laser, Wavemeter calibration
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I have calibrated our Wavemeter WS7 using the temperature stabilized He-Ne Laser (SIOS EN60 825-1:2014). In the screenshots below you can see the readout
of the wavemeter before (vor) and after (nach) calibration. |
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Mon May 16 17:15:56 2022, Carsten, Analysis, DAQ /Analysis - shift of peaks in the accumulated spectra, changes in code
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After a phone call with Wilfried I implemented an offset to all hit channels of the stacked / accumulated spectra where one chekcs the timing peaks.
Therfore, I made a copy of the analysis in 208Bi1 (one "1" at the end). And here, in the file TLdaAnlProc.cxx I added an offset of +70 to the hit channel |
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Mon May 16 17:38:38 2022, Max, Danyal, Wilfried, Rodolfo, General, laser bunch timing
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We overlapped the laser and ion bunch in the time domain.
Therefore we delayed the bunching HF in order to see the PMT signal between bin 10 and 22. Before the signal Peak was in channel ~145-5 and difficult to
gate on.
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Mon May 16 18:01:23 2022, mbsMax, Danyal, Wilfried, Rodolfo, Patrick, Kristian, David, Ruijiu , Runs, runs afternoon/night shift 16.05
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These are the runs after the septum was repaired on 16.05.
[TABLE border="1"]
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Mon May 16 19:20:55 2022, Max, Wilfried, Analysis, start go4 before laser scan
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| It is necessary to start go4 before you start the laser scan. Otherwise you get an offset in the laser Step plots. |
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Mon May 16 21:08:48 2022, Rodolfo & Max, Laser, Laser power
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We checked the energy of the laser and optimized it a bit
[TABLE border="1"]
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Mon May 16 22:19:54 2022, Patrick, DAQ, Keep go4 running (in theory), MBS
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To accumulate more data into the opened go4, do not restart MBS, but just
sto ac
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Mon May 16 22:57:40 2022, Patrick, Kristian, David, Ruijiu , Detectors, Switched off nitrogen
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Background counts with nitrogen and air.
Less multiphoton events with air (see pictures, histogram extended to 30 with nitrogen).
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Tue May 17 00:44:01 2022, Patrick, Kristian, DAQ, Changed PMT North CFD channel
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In run 8134 - 8135 PMT North showed a super high background rate. After the scan we checked the signal cables.
Incoming signal was still good until CFD. We changed channel from 2 to 12. New threshold is 36, was 10. |
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Tue May 17 06:37:28 2022, YL, KM, Accelerator, Reduced beam intensity
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The resonance in 209Bi has been seen during the night.
Reducing the intensity by a factor~1000, to simulate 208Bi conditions
Running low intensity since ~6:15-6:20
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Tue May 17 10:38:44 2022, Konstantin, Detectors, PMT North changed
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| PMT located at the northern window was again replaced by the narrow-band PMT (ET Enterprise type 9423 SB, SN: 650). |
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Fri May 27 10:39:53 2022, Kristian, DAQ, PMT North noise
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During the last run, PMT North showed some weird noise.
The PMT was replaced by the deep UV PMT with small aceptance range (100-200nm) but there was still a lot of noise on the output channel in the Messhütte, |
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Fri May 27 14:57:23 2022, Rodolfo, Laser, Laser Energy
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I have started up the laser system (Q-Ray & Cobra) again. Here some parameters*:
- Q-Ray's output energy (@532 nm: 547 mJ.
|
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Fri May 27 20:39:50 2022, Carsten, Analysis, Short Manual for updated Go4 DAQ (version 2022_05_27)
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| Short descriptions of the most recent version of the GO4 code is attached. I will install the corresponding vesion early on sunday. |
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Mon May 30 00:56:33 2022, Max, Patrick, Laser, Beam overlap
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The ion beam positions are (+- 1mm):
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Mon May 30 01:13:40 2022, Konstantin, Max, Patrick, Detectors, XUV-Detector voltage off
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| XUV-Detector shows up to 100 kHz and, therefore, was turned off. |
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Mon May 30 02:12:20 2022, Max, Patrick, ~Konstantin, Ragan, Ken, Runs, runs night shift 30.05.
|
These are the first runs of the substitute beamtime.
[TABLE border="1"]
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Mon May 30 02:33:45 2022, Patrick, MBS Max, DAQ, MBS procedure
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It is possible to keep go4 running now. Summary of the procedure:
DAC1: open file lxg1297:/data.local2/208Bi/208Bi -auto -rfio
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Mon May 30 08:35:41 2022, Kristian, Simon, Ken, Ragan, Detectors, Changed PMT North
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We did not see any signal at PMT North which was the narrowband PMT. Changed it to the old solar blind PMT. Now we see the resonance. It is about 3 times
larger as PMT middle, most likely because of the larger window. CFD threshold was set. I also increased the CFD threshold for PMT middle slightly.
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Mon May 30 09:28:43 2022, Ken, Kristian, Simon, Ragan, Detectors, XUV-Detector
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9:27 XUV-Detector is running again.
-5V cathode, 8A main coil, 2.4A sec.coil
|
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Mon May 30 16:17:39 2022, Kristian, David, Wilfried, Carsten, Danyal, Rodolfo, Runs, Afternoon shift 30.05
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These are the first runs after changing to the thick stripper foil.
[TABLE border="1"]
|
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Mon May 30 19:00:19 2022, Carsten, General, Scraper Settings and Parameters for the last measrements with thick target
|
old Bunch frequency: 1.98777 MHz
Positions PL devices:
|
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Mon May 30 19:42:20 2022, Rodolfo & Kristian, Laser, Changing laser wavelength
|
We have changed the laser wavelength, e.g. the dye for the Cobra to Fluorescein 27.
We get about 84 mJ out the main amplifier @ 548 nm.
|
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Mon May 30 20:58:26 2022, Carsten, Accelerator, New Settings for 208Bi Beam
|
Old SetParameters.C and old SetConditions.C were saved as SetParameters_209.C and SetConditions_209.C
The ion beam settings were changed to 208Bi82+:
|
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Mon May 30 21:52:08 2022, Wilfried, Danyal, David, Rodolfo, General, Position of T-Scrapers
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We have determined the position of the H-like 208Bi ion beam using the T-Scrapers. The position actually did not change in comparison to the position of
H-like 209Bi.
|
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Mon May 30 23:18:06 2022, Carsten, Rodolfo, Konstantin, Patrick, Ragan, Ken, Kristian, Max, Danyal, Runs, Runs shifts 31.05.
|
These are the first runs with 208Bi.
[TABLE border="1"]
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Tue May 31 03:18:52 2022, Patrick, Konstantin, Laser, Laser timing
|
The final timings are (in bins +-1):
PD NO: 103
|
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Tue May 31 15:19:58 2022, Max, Carsten, Danyal, General, scans for different E-cool currents
|
until 15:15 we have measured with I_e = 100 mA (3 loops per file)
E_cool HV = 225255 V
|
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Tue May 31 17:22:09 2022, Max, Carsten, Danyal, Rodolfo, Wilfried, General, change E-cooler current I_e = 50 mA
|
At 17:15 we changed again the E-cooler current I_e = 50 mA
(4 laser scan loops per injection)
|
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Tue May 31 19:32:56 2022, Carsten, Wilfried, Max, Calibration, electron cooler calibration voltage - frequency
|
[TABLE border="1"]
SetVoltage (DeltaU) | MeasVoltage | freq | Current
|-
|
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Tue May 31 19:37:30 2022, Carsten, Max, Wilfried, Detectors, SASZ and NASZ voltages switched off
|
| SASZ and NASZ voltages were switched off bevor we went back to 209Bi. Laser beam stabilization turned off. |
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Tue May 31 19:59:49 2022, Carsten, Danyal, Accelerator, change in frequency mismatch 208Bi --> 209Bi
|
time = 20:00
The RF has been adjusted so that it bunches at the correct frequency for 209Bi
|
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Tue May 31 21:08:04 2022, Carsten, Max, Detectors, XUV detector automation off
|
| We deactivated the automation of the XUV detector. It stays out now. |
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Tue May 31 21:58:55 2022, Max, Rodolfo, Laser, MRC Settings for 209Bi
|
We have change the laser settings for the spectroscopy of 209Bi.
We have now T-scraped the laser beam to the old position of the ion beam. The settings for the MRC system are shown in the screenshot below. |
|
Wed Jun 1 00:03:08 2022, Konstantin, Simon, Kristian, Runs, 209-Bi runs
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[TABLE border="1"]
Time | SIS-intensity | ESR-intensity after orbit change| cooler-HV | cooler current (mA) | LMD-DAQ2 file nr | LMD-DAQ1 file nr | scan range(nm) | step
width increment (nm) | dwell time(s) | n loops |comments
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Wed Jun 1 00:16:02 2022, Konstantin, Simon, DAQ, Timing 209Bi thick target
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Timing for the final measurements on 209Bi was determined for the new frequency 1.93777MHz. Peak positions are
PD NO 106
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Wed Jun 1 08:39:50 2022, Kristian, Konstantin, Calibration, Wavemeter reading
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We recorded files with high wavemeter readout rate and saved it at the atplaser network drive (Q:) - Bismuth - wavemeter folder.
Could be used to calibrate the laser steps. The MBS readout rate is 4 Hz, here 30 Hz, so there are a few more values. |
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Wed Jun 1 17:20:04 2022, Rodolfo, Laser, HeNe @ WS7
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Fri Jun 3 12:01:17 2022, Danyal, Detectors, switched off XUV detector on 1 June ~17:00
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I have switched off the XUV detector on 1 June at about 17:00.
The high voltages of the MCP (in ESR laser lab) were turned off and inside the ESR cave the power supplies (coils and cathode) and the crate were turned
off.
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Thu Jun 30 11:12:21 2022, Carsten, Analysis, Updated Go4 Analysis with small Bugfix (PMTOverWavelength SPectra)
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Here attached is a more recentversion of the Go4 Analysis Code with some smaller bugfixes.
For adaequate *.C files please have alook in 208Bi go4 directory on the atplaser account.
Please note, that there is also a (not fully up-to-date) description/manual somewhere here in the Elog. |
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Fri Jan 13 17:05:22 2023, Rodolfo, Laser, Testing WS6
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| Testing the new Wavemeter (HighFinesse, WS6, SN3950) with the QRAY laser light @ 532 nm. Multimode fiber von High Finesse:FC/PC S (Corning, MM, OM2) |
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Wed Jan 18 13:02:12 2023, Rodolfo, Laser, Testing WS6 with Cobra
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Testing the WS6 (S.N. 3950) together with the Cobra.
Cobra operated with dye DCM in Ethanol + DMSO (Concentration 1:1)
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Tue Jun 6 09:33:00 2023, Rodolfo, Laser, Fiber coupler
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| Cobra's new fiber-coupling unit for wavelength reading. |