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  Laser Cooling Experiment 2021, Page 3 of 5  Not logged in ELOG logo
IDup Date Author Category Subject Text Attachments
  42   Thu May 13 23:42:37 2021 Ken UeberholzGeneralWhat was doneIn this shift a number of successful Schottky
measurements were done:
With fixed laser wavelength, while varying
 Schottky1.jpegSchottky2.jpegSchottky3.jpegSchottky4.jpeg 
  43   Fri May 14 01:28:04 2021 SebastianGeneral"new" laser wavelengthMinor changes in electron cooler voltage (~+13V,
now 66903V measured by DMM) leads to that
we had to shift the laser wavelength to:
  
  44   Fri May 14 01:34:44 2021 TeamGeneralstrange XUV Anode signalWe see a strange behavior of the anode signal
when we bunch the ion beam and electron cooler
is on.
 Screenshot_(68).png 
  45   Fri May 14 04:50:46 2021 Team #NightGeneralScraper Tests Ion / Laser Beamlaser is 4-6mm below the ion beam.
It could be that the interaction between
both beams came only from the interaction
  
  46   Fri May 14 06:34:45 2021 Team #NightAnalysisDSG821 IP140.181.104.108   
  47   Fri May 14 06:35:55 2021 Team #NightGeneralAdjustment of Laserwe increased the height of the laser beam

TEM Settings
  
  48   Fri May 14 07:20:18 2021 Team #NightGeneralactual bunching frequency25,82556 MHz
h = 20
  
  Draft   Fri May 14 07:33:42 2021 Team #NightGeneralecooler central frequency shifted relative to bunch central frequency    
  50   Fri May 14 08:55:53 2021 SebastianGeneralToDO 14.5 ...so far1.) ion lasser overlap and scraper test

2.) change bunching frequency to middle of
  
  51   Fri May 14 09:00:55 2021 SebastianGeneralUNILAC Problems~30 min downtime

--> LASER ADJUSTEMENTS!
  
  Draft   Fri May 14 09:35:20 2021 NightshiftRunsCoasting beam, scanning laser, ecooler on   IMG-20210514-WA0018.jpg 
  53   Fri May 14 09:38:04 2021 NightshiftRunsCoasting beam, scanning laser, ecooler on   IMG-20210514-WA0018.jpg 
  54   Fri May 14 09:38:43 2021 NightshiftRunsCoasting beam, ecooler on, scanning laser   IMG-20210514-WA0019.jpg 
  55   Fri May 14 09:40:04 2021 NightshiftRunsEcooling vs laser wavelength shift, coasting beam, laser stronger than EcoolingLast three pictures where taken after 
first laser ion beam overlap adjustments
 IMG-20210514-WA0017.jpg 
  56   Fri May 14 11:01:33 2021 BenediktCalibrationLaser Beam adjustedThe laser beam was adjusted in his position
to overlap better with the ions.
  
  57   Fri May 14 16:37:01 2021 BenediktGeneralStatus updateRight now, we have to adjust the ion beam
a bit to overlap better with the laser beam.
We keep the laser wavelength at resonance
  
  58   Fri May 14 21:43:40 2021 SebastianGeneral"problems accelerator"There are cooling problems of some accelerator
devices
short break, hopefully :)
  
  59   Fri May 14 22:04:25 2021 TeamAcceleratorESR OPEN ; NO BEAM -> Reset cooling devicewe had to open the ESR to reset a cooling
device
  
  60   Fri May 14 22:20:37 2021 TeamAcceleratorESR Closed - BEAM #ON!    
  61   Sat May 15 03:39:16 2021 TeamGeneralactual revolution frequencyfrev = 1,2912735 MHz   
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