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ID Date Author Category Subject Text   62   Sat May 15 06:51:16 2021 Night Shift Sebastian/Max/Noah General Different Laserscantypes We use different scan types (manual scan) or constant laser wavelengths to check the effects of laser cooling in the Schottky      67   Sat May 15 11:06:31 2021 Benedikt General New Zoom link for the moment https://tu-darmstadt.zoom.us/j/4948400422?pwd=SEJaUzBuYXM0TTd6UWxoZTFlWEZxUT09 Meeting ID: 494 840 0422      68   Sat May 15 11:26:44 2021 Benedikt General TEM parameters We changed the horizontal position of the laser beam a bit, so that we maximized the fluorescence signal on the XUV detector (coasting      69   Sat May 15 12:11:54 2021 Benedikt General Laser-bunch-timing Optimizing the laser bunch timing. h = 7 (9.0389145 MHz) Reprate is already set to same frequency.      70   Sun May 16 02:18:53 2021 Sebastian General UV Drop 1:25 a.m. huge drop in UV laser power -> small crystal bump with both y screws of bbo oven      Draft   Sun May 16 02:20:58 2021 Sebastian General "Der Laser ist (wieder) ok"        72   Sun May 16 02:22:19 2021 Sebastian General "Der Laser ist ok"        73   Sun May 16 02:28:21 2021 Team General #Beam ON! Laser specs: pulse length -> 482ps      74   Sun May 16 05:09:04 2021 Team General Laser cooling with 482ps we see laser cooling with 482ps pulse length      75   Sun May 16 05:09:27 2021 Team General Switch to 285ps pulse length -> 285ps minimum 62mW inside ESR (depending on laser      76   Sun May 16 05:24:00 2021 Team General Laser cooling with 285ps we also see laser cooling with 285ps pulse length      77   Sun May 16 06:13:46 2021 Team General Switch to 166ps        78   Sun May 16 07:03:07 2021 Team General Laser cooling with 166ps We saw some indications of laser cooling @ 166ps pulse length      79   Sun May 16 07:18:56 2021 Night Shift Sebastian/Max/Noah General Preparation for automated laser scans We shut the laser system down to prepare automated laser scans      80   Sun May 16 11:29:22 2021 Benedikt General Automated laser scans working The automated laser scans are working now. We can now scan with the following functions: triangle, sawtooth, cosinus/sinus, arctan,      81   Sun May 16 21:23:02 2021 Team General ESR OPEN -> preparation for Polarisation Tests        82   Sun May 16 22:11:49 2021 Team General Laser Polarisation values maximal transmission of PBSC (257/514 pbsc was used in combination with xlp12 detector and visual on a screen):      83   Mon May 17 08:05:42 2021 Team General End of beamtime ~ 8 a.m.      84   Mon May 17 21:43:56 2021 Danyal General The test beamtime was a success. Dear all, The test beamtime is now over.       4   Tue May 11 16:33:31 2021 Ken Ueberholz Detectors Detector control manual Attached to this elog entry is a short manual for the xuv-detector control. If anything is missing or not understandable I can change

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