 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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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 ?! |
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Fri May 14 06:34:45 2021, Team #Night, Analysis, DSG821 IP
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| 140.181.104.108 |
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Fri May 14 06:35:55 2021, Team #Night, General, Adjustment of Laser
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we increased the height of the laser beam
TEM Settings
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Fri May 14 07:20:18 2021, Team #Night, General, actual bunching frequency
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25,82556 MHz
h = 20 |
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Fri May 14 07:33:42 2021, Team #Night, General, ecooler central frequency shifted relative to bunch central frequency
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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 22:04:25 2021, Team, Accelerator, ESR OPEN ; NO BEAM -> Reset cooling device
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| we had to open the ESR to reset a cooling device |
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Fri May 14 22:20:37 2021, Team, Accelerator, ESR Closed - BEAM #ON!
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Sat May 15 03:39:16 2021, Team, General, actual revolution frequency
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| frev = 1,2912735 MHz |
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Sat May 15 09:50:31 2021, Team, Runs, Laser cooling of....
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H=2
H=7
H=10
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Sun May 16 02:28:21 2021, Team, General, #Beam ON!
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Laser specs:
pulse length -> 482ps
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Sun May 16 05:09:04 2021, Team, General, Laser cooling with 482ps
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| we see laser cooling with 482ps pulse length |
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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 05:24:00 2021, Team, General, Laser cooling with 285ps
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| we also see laser cooling with 285ps pulse length |
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Sun May 16 06:13:46 2021, Team, General, Switch to 166ps
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Sun May 16 07:03:07 2021, Team, General, Laser cooling with 166ps
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| We saw some indications of laser cooling @ 166ps pulse length |
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Sun May 16 21:23:02 2021, Team, General, ESR OPEN -> preparation for Polarisation Tests
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Sun May 16 22:11:49 2021, Team, General, Laser Polarisation values
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maximal transmission of PBSC (257/514 pbsc was used in combination with xlp12 detector and visual on a screen):
L/4 @ 276° & L/2 @ 348° --> p-polarized light
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Mon May 17 08:05:42 2021, Team, General, End of beamtime
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| ~ 8 a.m. |