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  Laser Cooling Experiment 2021, Page 2 of 5  Not logged in ELOG logo
ID Date Author Categoryup Subject Text Attachments
  30   Thu May 13 00:58:53 2021 DanyalDAQunbunched ion beam   not_bunched_-_signal.jpgnot_bunched_-_Schottky.jpg 
  31   Thu May 13 01:01:27 2021 DanyalDAQbunched ion beam   bunched_-_signal.jpgbunched_-_Schottky.jpgzoom_bunched_-_Schottky.jpg 
  32   Thu May 13 01:05:45 2021 DanyalDAQmore stability by bunchingBecause the C3+ part of the ion beam is properly
bunched, it is no longer so sensitive to
the drifts caused by the e-cooler. 
  
  4   Tue May 11 16:33:31 2021 Ken UeberholzDetectorsDetector control manualAttached to this elog entry is a short manual
for the xuv-detector control. If anything
is missing or not understandable I can change
 Manual.pdf 
  85   Tue May 31 07:29:11 2022 KenDetectorsXUV-DetektorRate was very low: ~ 100Hz
Adjusted Walk level and Threshold, new rate:
5kHz
  
  1   Mon May 10 07:58:13 2021 DanyalGeneralTelephone numbers and Zoom linkTelephone numbers:

ESR laser lab: +49 (0)6159 71 - 2882
  
  2   Tue May 11 15:49:30 2021 DanyalGeneralsetting up ESRThe operators are still busy extracting the
beam from the SIS18 towards the ESR and injecting
it into the ESR. 
  
  5   Tue May 11 18:29:35 2021 DanyalGeneralfirst ions in the ESR   first_ions_are_injected.jpg 
  6   Tue May 11 20:14:43 2021 DanyalGeneralbad ESR vacuumI just heard that the ESR vacuum is quite
bad. 
There was a small vacuum problem a while
  
  8   Wed May 12 02:34:29 2021 DanyalGeneralinstabilities in ion frequencyThe ion beam moves around, pretty arbitrary.
See picture. 
ESR crew believes that it is not due to fluctuations
 fluctuations.jpg 
  10   Wed May 12 08:10:17 2021 LarsGeneralinstabilities in ion frequencylooks like the E-Cooler is responsible for
this. If one turns off the electron current,
the beam stays stable. 
  
  17   Wed May 12 09:59:08 2021 BenediktGeneralRigol DSG821 signal generator settings   CF7701F6-86BE-406C-8FAD-F3161463181C.jpeg 
  22   Wed May 12 18:59:15 2021 Ken UeberholzGeneralPower is backPower is back and most things are running
again
  
  23   Wed May 12 19:48:24 2021 SebastianGeneralDSG821 NetworkTo implement the bunch Signal Generator (DSG821
inside ESR) you have to:
 IMG_20210512_195329_resized_20210512_075346417.jpg 
  24   Wed May 12 22:28:55 2021 Ken UeberholzGeneralBunching succesfullBunching with 2 and 10 bunches succesfull   
  25   Wed May 12 22:35:33 2021 DanyalGeneralfrev and fbSchottky frequency (189th harmonic) = 244.033662
MHz
  
  26   Wed May 12 22:48:25 2021 SebastianGeneralDSG Control SCPI CommandsOpen Ultra Sigma
Press LAN
Press Search, after a while the whole rigol
  
  27   Wed May 12 22:57:41 2021 SebastianGeneralLaser Repratelaser reprate is seven times the revoolution
frequency: 9.038283 MHz
pulse length: 735ps
  
  29   Wed May 12 23:45:23 2021 Ken UeberholzGeneralLaser does not reach the exit windowHigh rates on the detector at 50mm positions,
laser does not seem to reach the exit window.
  
  33   Thu May 13 01:13:06 2021 SebastianGeneralBunching frequenciesrelating to Danyals ID 25 post are the current
bunching frequencies:
  
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