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  Laser Cooling Experiment 2021, Page 2 of 5  Not logged in ELOG logo
ID Date Author Categorydown Subject Text Attachments
  33   Thu May 13 01:13:06 2021 SebastianGeneralBunching frequenciesrelating to Danyals ID 25 post are the current
bunching frequencies:
  
  34   Thu May 13 01:21:30 2021 SebastianGeneralCurrent schedule ... so far1.) check h=2,4,6,7,8,10 .... bunching frequencies
with different amplitudes (signalgenerator),
Ecooler ON, Laser OFF --> record schottky
  
  35   Thu May 13 01:55:15 2021 SebastianGeneralESR amplifier reset / laser checkwe had to go into the ESR because the amplifiers
hooked up. both amplifiers were resetted!
 IMG_20210513_014345_resized_20210513_015540959.jpgIMG_20210513_014353_resized_20210513_015541291.jpg 
  36   Thu May 13 02:42:58 2021 SebastianGeneralLasershutter ESR Entrance?!attached should be the name of the entrance
laser shutter. just in case somebody will
close it ;)
 IMG_20210513_020027_resized_20210513_024049198.jpg 
  38   Thu May 13 03:35:25 2021 LarsGeneralStatus: Current schedule ... so far1.) so far: 
h = 2, 4, 6, 7, 8, 10, 12, 14, 16, 18, 20,
30
  
  39   Thu May 13 18:34:54 2021 Ken UeberholzGeneralWhat happened scince shift change at 4pmIon frequency shifts with laser, both manually
and scanned, without bunches: successful
Bunching with 7 and 20 bunches: successful
  
  40   Thu May 13 20:18:10 2021 BenediktGeneralNew f_revThe ions were changed to a different speed
today at 2 PM. The new revolution frequency
is now 1.291278 MHz.
  
  41   Thu May 13 21:00:48 2021 BenediktGeneralNew reprate of the UV laserThe lasersystem now operates at a reparte
of 9.038946 MHz. This is 7 times f_rev (see
previous post).
  
  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
  
  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!
  
  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 :)
  
  61   Sat May 15 03:39:16 2021 TeamGeneralactual revolution frequencyfrev = 1,2912735 MHz   
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