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  Dielectronic recombination-assisted laser spectroscopy, Page 3 of 6  Not logged in ELOG logo
ID Date Author Categoryup Subject Text Attachments
  87   Mon May 30 02:33:45 2022 Patrick, MBS MaxDAQMBS procedureIt is possible to keep go4 running now. Summary
of the procedure:
  
  106   Wed Jun 1 00:16:02 2022 Konstantin, SimonDAQTiming 209Bi thick targetTiming for the final measurements on 209Bi
was determined for the new frequency 1.93777MHz.
Peak positions are
 Timing_209Bi_final.png 
  6   Tue Apr 26 18:15:19 2022 RodolfoDetectorsXUV-Detector and Cu-MirrorConcerning the moveable detectors: 

- I have switched off the power supply and
  
  14   Fri May 6 16:29:03 2022 Simon, PatrickDetectorsPMT preparationWe changed PMT north and PMT south and tested
them at 1500 V.
  
  19   Mon May 9 16:58:41 2022 CarstenDetectorsVoltage particle dectectors NA_SZ und SA_SZ switched onVoltage SA_SZ (capture behind cooler): 1500
V (thin plastic scintillator)
Voltage NA_SZ (capture behind target): 750V
  
  29   Tue May 10 20:35:42 2022 Phillip, Wilfried, MaxDetectorsPMT ThresholdSince we have ions in the ring now, we looked
at the PMT thresholds and the widths. In
order to do so we looked at the Raw Signal
  
  45   Wed May 11 18:00:40 2022 Wilfried, Phillip, MaxDetectorsdouble PD NO peak problem solvedIn entry 36 one finds an additional PD NO
peak around bin 100.
This was caused by signal reflection in the
  
  51   Wed May 11 23:34:39 2022 Patrick, CarstenDetectorsParticle Detectors / Scraper positionsVoltages of particle detectors off.

Scraper positions:
  
  77   Mon May 16 22:57:40 2022 Patrick, Kristian, David, Ruijiu DetectorsSwitched off nitrogenBackground counts with nitrogen and air.
Less multiphoton events with air (see pictures,
histogram extended to 30 with nitrogen).
 2022-05-16_PMTs_after_nitrogen_off.png 
  80   Tue May 17 10:38:44 2022 KonstantinDetectorsPMT North changedPMT located at the northern window was again
replaced by the narrow-band PMT (ET Enterprise
type 9423 SB, SN: 650).
  
  85   Mon May 30 01:13:40 2022 Konstantin, Max, PatrickDetectorsXUV-Detector voltage offXUV-Detector shows up to 100 kHz and, therefore,
was turned off.
  
  88   Mon May 30 08:35:41 2022 Kristian, Simon, Ken, RaganDetectorsChanged PMT NorthWe did not see any signal at PMT North which
was the narrowband PMT. Changed it to the
old solar blind PMT. Now we see the resonance.
  
  89   Mon May 30 09:28:43 2022 Ken, Kristian, Simon, RaganDetectorsXUV-Detector9:27 XUV-Detector is running again.

-5V cathode, 8A main coil, 2.4A sec.coil
  
  101   Tue May 31 19:37:30 2022 Carsten, Max, WilfriedDetectorsSASZ and NASZ voltages switched offSASZ and NASZ voltages were switched off bevor
we went back to 209Bi. Laser beam stabilization
turned off.
  
  103   Tue May 31 21:08:04 2022 Carsten, MaxDetectorsXUV detector automation offWe deactivated the automation of the XUV detector.
It stays out now.
  
  109   Fri Jun 3 12:01:17 2022 DanyalDetectorsswitched off XUV detector on 1 June ~17:00 I have switched off the XUV detector on 1
June at about 17:00. 
The high voltages of the MCP (in ESR laser
  
  17   Mon May 9 11:45:57 2022 Wilfried, Jon, SebastianGeneralHV Divider position & DMM calibrationWe performed an autocalibration (attached
picture 1) of the Keysight 34465A DMM (TUD
Keysight).
 DMM_calibration.PNGdividerPosition.PNGdividerPosition1.PNG 
  34   Tue May 10 23:53:42 2022 RodolfoGeneralshift changeThe night shift took over. They are trying
now to overlap the ion and laser beams. 
  
  41   Wed May 11 07:28:39 2022 Simon, Christopher, ShahabGeneralDAQ Loop for shiftersProcedure:

- Scanning phase ends (on LabView wait until
  
  48   Wed May 11 22:04:30 2022 Phillip, Wilfried, MaxGeneralspacial laser - ion overlap verified After the SIS/ESR optimization we checked
the spatial overlap with the T-scrapers again.
  
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