 Wed May 12 10:15:47 2021, Volker Hannen, DAQ, Unplugged TDC inputs for MCP front and back
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To reduce the load on the VUPROM TDC, we unplugged the TDC inputs for the front and back signals of the MCP of the XUV detector.
The Anode signal is still plugged in and should be sufficient for the analysis. |
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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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Fri May 14 09:00:55 2021, Sebastian, General, UNILAC Problems
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~30 min downtime
--> LASER ADJUSTEMENTS! |
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Fri May 14 08:55:53 2021, Sebastian, General, ToDO 14.5 ...so far
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1.) ion lasser overlap and scraper test
2.) change bunching frequency to middle of ecooled coasting beam
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Mon May 17 21:43:56 2021, Danyal, General, The test beamtime was a success.
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Dear all,
The test beamtime is now over.
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Mon May 10 07:58:13 2021, Danyal, General, Telephone numbers and Zoom link
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Telephone numbers:
ESR laser lab: +49 (0)6159 71 - 2882
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Sat May 15 11:26:44 2021, Benedikt, General, TEM parameters
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We changed the horizontal position of the laser beam a bit, so that we maximized the fluorescence signal on the XUV detector (coasting beam, scanning laser
(0.03 Hz)).
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Sun May 16 05:09:27 2021, Team, General, Switch to 285ps
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pulse length -> 285ps
minimum 62mW inside ESR (depending on laser wavelength) |
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Sun May 16 06:13:46 2021, Team, General, Switch to 166ps
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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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Fri May 14 16:37:01 2021, Benedikt, General, Status update
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Right now, we have to adjust the ion beam a bit to overlap better with the laser beam.
We keep the laser wavelength at resonance with the ions and try to optimize the fluorescence signal on the XUV detector while moving the ion beam. |
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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 ?! |
Wed May 12 09:59:08 2021, Benedikt, General, Rigol DSG821 signal generator settings 
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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 |
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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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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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Sat May 15 11:06:31 2021, Benedikt, General, New Zoom link for the moment
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https://tu-darmstadt.zoom.us/j/4948400422?pwd=SEJaUzBuYXM0TTd6UWxoZTFlWEZxUT09
Meeting ID: 494 840 0422
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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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Sat May 15 12:11:54 2021, Benedikt, General, Laser-bunch-timing
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Optimizing the laser bunch timing.
h = 7 (9.0389145 MHz)
Reprate is already set to same frequency.
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