 Fri May 14 04:50:46 2021, Team #Night, General, Scraper Tests Ion / Laser Beam
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laser is 4-6mm below the ion beam.
It could be that the interaction between both beams came only from the interaction between the laser halo with the ion beam ?! |
Fri May 14 01:34:44 2021, Team, General, strange XUV Anode signal 
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We see a strange behavior of the anode signal when we bunch the ion beam and electron cooler is on.
peak structure... ---> we play now with the bunching amplitude
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Fri May 14 01:28:04 2021, Sebastian, General, "new" laser wavelength
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Minor changes in electron cooler voltage (~+13V, now 66903V measured by DMM) leads to that we had to shift the laser wavelength to:
1028,965nm
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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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Thu May 13 21:00:48 2021, Benedikt, General, New reprate of the UV laser
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The lasersystem now operates at a reparte of 9.038946 MHz. This is 7 times f_rev (see previous post).
In the future, the laser-bunch-timing can be adjusted. |
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Thu May 13 20:18:10 2021, Benedikt, General, New f_rev
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| The ions were changed to a different speed today at 2 PM. The new revolution frequency is now 1.291278 MHz. |
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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 01:21:30 2021, Sebastian, General, Current schedule ... so far
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1.) check h=2,4,6,7,8,10 .... bunching frequencies with different amplitudes (signalgenerator), Ecooler ON, Laser OFF --> record schottky and "normal" DAQ
2.) Ecooler ON, Bunching ON, Laser ON (wavelength fixed and/or scanned)
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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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Thu May 13 02:45:29 2021, Sebastian, Analysis, ESR pressure 8x
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Thu May 13 02:42:58 2021, Sebastian, General, Lasershutter ESR Entrance?!
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| attached should be the name of the entrance laser shutter. just in case somebody will close it ;) |
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Thu May 13 01:55:15 2021, Sebastian, General, ESR amplifier reset / laser check
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we had to go into the ESR because the amplifiers hooked up. both amplifiers were resetted!
we also checked why we didnt see the laser at the exit window.
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Thu May 13 01:13:06 2021, Sebastian, General, Bunching frequencies
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relating to Danyals ID 25 post are the current bunching frequencies:
h=2 --> 2,5823668 MHz
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Thu May 13 01:05:45 2021, Danyal, DAQ, more stability by bunching
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Because the C3+ part of the ion beam is properly bunched, it is no longer so sensitive to the drifts caused by the e-cooler.
In the O4+ part of the ion beam these drifts can still be seen. |
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Thu May 13 01:01:27 2021, Danyal, DAQ, bunched ion beam
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Thu May 13 00:58:53 2021, Danyal, DAQ, unbunched ion beam
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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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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 22:57:41 2021, Sebastian, General, Laser Reprate
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laser reprate is seven times the revoolution frequency: 9.038283 MHz
pulse length: 735ps |
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Wed May 12 22:48:25 2021, Sebastian, General, DSG Control SCPI Commands
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Open Ultra Sigma
Press LAN
Press Search, after a while the whole rigol devices are shown. Press ok
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Wed May 12 22:35:33 2021, Danyal, General, frev and fb
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Schottky frequency (189th harmonic) = 244.033662 MHz
revolution frequency frev = 1.2911834 MHz
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