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  Bound beta decay experiment on Tl-205, Page 1 of 9  Not logged in ELOG logo
ID Date Author Category Subjectup Text Attachments
  52   Sun Mar 29 13:43:46 2020       5765BDDD-C10A-44AD-AF85-07134B06F34E.jpeg 
  102   Mon Mar 30 16:37:53 2020 ruijiuAnalysis     
  79   Mon Mar 30 06:34:47 2020 RaganGeneral Second measurement with 206Pb81+ beam at I_cooler = 20 mA In the ESR picture below, the decay of beam
is very fast initially for few minutes and
then the decay is constant. But why does
 C7A2736D-9C0A-4531-A768-85A55943EB5A.jpeg 
  149   Sat Apr 4 18:29:44 2020 Ragan, Alex, EstherRuns0 hour measurement (S2: 0/35 mm and S6: -20/7 mm)beam: 205Tl81+ (no scraping , Al ~1g/cm2)
energy: 400 MeV/u
storage time: 0 hr
 2020-04-04_18-27-53-442.png2020-04-04_18-41-54-901.pngF5D184AC-FB3E-4F9F-B839-F71BC55C0996.jpegE4176CCB-1828-4E2E-85FB-0AC4BDC2808B.jpeg 
  147   Sat Apr 4 15:59:16 2020 Ragan, Shahab, Alex, EstherRuns0.5 hour measurement (S2: 0/35 mm and S6: -20/7 mm)beam: 205Tl81+ (no scraping , Al ~1g/cm2)
energy: 400 MeV/u
storage time: 0.5 hr
 2020-04-04_16-04-30-807.png636A1F49-737F-4147-8CF0-CA7F4108B719.jpeg2020-04-04_16-49-50-990.png7B45A7EA-0421-497B-8A37-674B6792D7E9.jpeg 
  165   Mon Apr 6 08:37:02 2020 Ragan, Shahab, Pierre-MichelRuns10 hour measurement (S2: 0/35 mm and S6: -20/7 mm)beam: 205Tl81+ (no scraping , Al ~1g/cm2)
energy: 400 MeV/u
storage time: 10 hr
 8x 
  154   Sun Apr 5 10:21:54 2020 ShahabRuns10 hour measurement picturesSchottky pictures from the 10 hour measurement
gas target, including the time before gas
target.
 2020-04-05-10h-aftergasjet2.PNG2020-04-05-10h-aftergasjet.PNG205Tl_gasjet_view3.PNG 
  108   Tue Mar 31 20:50:05 2020 RaganGeneral200Hg79+ 205Tl81+203Tl80+ impurity is removed by moving scrapper
inside ESR.
Only 220Hg79+ is left now
 31E7D028-F469-4BFF-B683-203821C174E9.jpeg 
  107   Tue Mar 31 20:32:05 2020 RaganGeneral203Tl80+ 200Hg79+ 205Tl81+Below in the schottky spectrum, on left is
203Tl80+ contamination, in middel is 200Hg79+
contamination and on right most is 205Tl81+.
 85AD7203-736C-4531-BA80-D045CC690BED.jpeg 
  156   Sun Apr 5 12:48:58 2020 ShahabRuns2hour measurement parent pictures   6x 
  119   Thu Apr 2 09:21:19 2020 RuijiuRuns2nd measurement with 2 hrs storage time (repeat)Because the electron cooler was not switched
on during beam accumulation in the previous
measurement, we repeat this measurement again.
 IMG_20200402_092631.jpg 
  152   Sat Apr 4 22:31:02 2020 Alex, EstherGeneralBeam in ESR lostThe beam in ESR was lost suddenly at ~22:20
due to a power supply failure of the quadrupoles.
 2020-04-04_22-50-23-470.png 
  23   Fri Mar 27 19:59:09 2020 RaganGeneralBeam stacking in ESR is achievedThanks to Sergey and Markus, stacking of primary
H-like 206Pb81+ beam in ESR is achieved.
 8B7F254E-DB10-48B6-9E2E-9CA0FF998C12.MOVstacking.png 
  103   Mon Mar 30 20:51:06 2020 RaganDetectorsBias Voltage for Si-padsThe limit of the leakage current for all Si
pads was increased from 1500 nA to 5000nA
and 
 Si_pad_bias-voltage.ods 
  33   Sat Mar 28 12:19:21 2020 Ragan, RuiJiuDAQChange of the polarity of AmplifiersSince last night, the signals from the p-side
of all the Si pads were seen as negative
on picoscope.
 7888530B-DE66-4D37-A0A8-933307DD2AB8.MOV 
  26   Sat Mar 28 01:14:19 2020 RaganGeneralCross-section for capture and ionisation of 206Pb81+ with H2 target Cross-section for capture and ionisation of
206Pb81+ with H2 gas jet target are calculated
using GLOBAL code.
 GLOBAL.pdf 
  174   Wed Aug 5 17:19:16 2020 Rui-Jiu ChenAnalysisData structure   DataStructure.pdf 
  12   Thu Oct 24 15:36:13 2019 Chen, SidhuDetectorsDetector installation process[IMG]elog:12/1[/IMG]
[IMG]elog:12/2[/IMG]
[IMG]elog:12/3[/IMG]
 Detector_installation_process1.pngDetector_installation_process2.pngDetector_installation_process3.pngDetector_installation_process.pdf 
  4   Fri Dec 7 10:56:04 2018 Jan GloriusSlowControlEPICS ioc on raspberryWe have an EPCIS server (ioc) running on our
raspberry (ext-027377). It talks to our MesyTec
modules (MSCF shapers, MHV4 high-voltages).
  
  22   Fri Mar 27 19:51:37 2020 RaganGeneralESR MachineBy changing the tune to Qx=2.33, Qy=2.36 the
momentum acceptance was significantly improved.
A variation of the cooler voltage of 10300
  
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