 Sun May 16 02:18:53 2021, Sebastian, General, UV Drop
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1:25 a.m. huge drop in UV laser power
-> small crystal bump with both y screws of bbo oven |
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Sun May 16 02:20:58 2021, Sebastian, General, "Der Laser ist (wieder) ok"
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Sun May 16 02:22:19 2021, Sebastian, General, "Der Laser ist ok"
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Fri May 14 09:35:20 2021, Nightshift, Runs, Coasting beam, scanning laser, ecooler on 
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Fri May 14 09:38:04 2021, Nightshift, Runs, Coasting beam, scanning laser, ecooler on
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Fri May 14 09:38:43 2021, Nightshift, Runs, Coasting beam, ecooler on, scanning laser
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Fri May 14 09:40:04 2021, Nightshift, Runs, Ecooling vs laser wavelength shift, coasting beam, laser stronger than Ecooling
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Last three pictures where taken after
first laser ion beam overlap adjustments
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Sat May 15 06:51:16 2021, Night Shift Sebastian/Max/Noah, General, Different Laserscantypes
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We use different scan types (manual scan) or constant laser wavelengths to check the effects of laser cooling in the Schottky diagrams (fluorescence can
not be seen in the detector), for different bunching amplitudes and frequencies:
- Scan from 1028.950 -> 1028.940, stepsize 0.001 every 10 sec
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Sun May 16 07:18:56 2021, Night Shift Sebastian/Max/Noah, General, Preparation for automated laser scans
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| We shut the laser system down to prepare automated laser scans |
 Wed May 12 08:10:17 2021, Lars, General, instabilities in ion frequency
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looks like the E-Cooler is responsible for this. If one turns off the electron current, the beam stays stable.
M.Steck is informed.
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Wed May 12 10:14:18 2021, Lars, Accelerator, E-Cooler
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M.Steck et al. discussed about the E-Cooler and found a possible issue. They asked for enterance to the ESR. Since nobody else was in the HKR and anyway
nothing was running because of some other issues, I told, the experiment would not be disturbed and they could enter and do things. (Sth. like putting
some repeller electrodes onto hand and other magical things).
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Thu May 13 03:35:25 2021, Lars, General, Status: Current schedule ... so far
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1.) so far:
h = 2, 4, 6, 7, 8, 10, 12, 14, 16, 18, 20, 30
Amplitudes: (10, 50, 100, 150, 200, 250) mV
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Wed May 12 09:05:48 2021, Keysight Settings, DAQ,
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Tue May 11 16:33:31 2021, Ken Ueberholz, Detectors, Detector control manual
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| Attached to this elog entry is a short manual for the xuv-detector control. If anything is missing or not understandable I can change anything. |
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Wed May 12 18:59:15 2021, Ken Ueberholz, General, Power is back
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| Power is back and most things are running again |
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Wed May 12 22:28:55 2021, Ken Ueberholz, General, Bunching succesfull
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| Bunching with 2 and 10 bunches succesfull |
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Wed May 12 23:36:18 2021, Ken Ueberholz, DAQ, VI change
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carbon main vi - kopie is now in operation
here, in keysight.vi the input settings for the new impedence for the multimeter are now hopefully correct --> THIS SHOULD BE CHECKED IF THE RING IS OPEN |
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Wed May 12 23:45:23 2021, Ken Ueberholz, General, Laser does not reach the exit window
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| High rates on the detector at 50mm positions, laser does not seem to reach the exit window. |
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Thu May 13 18:34:54 2021, Ken Ueberholz, General, What happened scince shift change at 4pm
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Ion frequency shifts with laser, both manually and scanned, without bunches: successful
Bunching with 7 and 20 bunches: successful
Tried laser scans with bunches: unsuccessful
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Thu May 13 23:42:37 2021, Ken Ueberholz, General, What was done
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In this shift a number of successful Schottky measurements were done:
With fixed laser wavelength, while varying the wavelength, with different bunching and more (see logfile 1 for more info: line 53 to at least 107).
The detector software sometimes files to change the current of the power supplies, if this happens a simple restart of the GUI fixes the problem.
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