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  Dielectronic recombination-assisted laser spectroscopy, Page 6 of 6  Not logged in ELOG logo
ID Date Authordown Category Subject
  102   Tue May 31 19:59:49 2022 Carsten, DanyalAcceleratorchange in frequency mismatch 208Bi --> 209Bi
time = 20:00 

The RF has been adjusted so that it bunches at the correct frequency for 209Bi 

For 208Bi the settings ("frequency mismatch") were: 
-0.102 in SC5 
-0,102 in SC11  


For 209Bi the settings ("frequency mismatch") are (and were yesterday): 
-0.83 in SC5 
-0,83 in SC11  
  5   Tue Apr 26 16:28:14 2022 CarstenDAQCable of Bunch HF disconnected and 1.995Mhz signal connected for DAQ tests
see subject.
  19   Mon May 9 16:58:41 2022 CarstenDetectorsVoltage particle dectectors NA_SZ und SA_SZ switched on
Voltage SA_SZ (capture behind cooler): 1500 V (thin plastic scintillator)
Voltage NA_SZ (capture behind target): 750V (thick plastic, short absorption length)

Voltages and thershholds from thorium run, still to be verified.
  20   Mon May 9 17:01:02 2022 CarstenDAQdirectories / paths / comments / reduction factors /startup.scom files for the 2 DAQs
DAQ1 (original):
-user atplaser
-runs on lxg1050
-data in lxg1297:/data.lcoal2/208Bi
-go4 in ~/go4/208Bi
-mbs /esr/usr/atplaser/mbsrun/208Bi

Since the Go4 Code is still under development (clean up etc.), I still plan to submit regular updates, the last version before is always in ~go4/208Bi
It is planne that all essentialy settings can be done via the automatically loaded script files SetParamters.C and SetConditions.C, so that no recompilation (and change of code) is required (work in progress).

DAQ2 (new / enhanced):
additional 25ps TDC and ADC
-user stoe_exp
-runs on lxg0155
-data in lxg0155:/data.lcoal2/E128
-go4 in ~/E128
-mbs /esr/usr/stoe_exp/E128

There are no two different startup-files on each system (startup.scom and startup0.scom)
i.e. @startup0 in mbs -> Starts everything WITHOUT file writing
and @startup in mbs -> Starts everything WITH file writing (including onnect rfio and open file). For this, rawDispRFIO64, has to be started (locally __IN__ the data directory).


Please note that the different path and file names are on purpose, so that they can be distinguished after the run.
  21   Mon May 9 17:14:02 2022 CarstenDAQNTCAP DAQ
The NTCap DAQ computer in the HKR (Schottky logbook) is started, and all preparations for data taking (mounting of NAS etc.) are done.
Parameters for NTCAP DAQ will be adjusted as soon as beam is available. 
  22   Mon May 9 17:16:34 2022 CarstenAcceleratorImportant: New ESR pattern - requies action for XUV detector in/out
The ESR pattern is enhanced compared to the thorium experiment by additional machines that can be  used for cooling/waiting in order to optimize 208Bi yield.
As a consequence, the sub chain numbers (previous: virtuelle Beschleuniger) are changed. The new numbers still have to be dialed in into the devices in the Messhütte and the automatic in/out of the XUV-detector tested-
  71   Mon May 16 17:15:56 2022 CarstenAnalysisDAQ /Analysis - shift of peaks in the accumulated spectra, changes in code
After a phone call with Wilfried I implemented an offset to all hit channels of the stacked / accumulated spectra where one chekcs the timing peaks.

Therfore, I made a copy of the analysis in 208Bi1 (one "1" at the end). And here, in the file TLdaAnlProc.cxx I added an offset of +70 to the hit channel (variable UInt_t hit, around line 335 /336 of the code).
Pleasse note that I just inlcuded one line with a "magic" number here, since I cannnot test teh compiling and was afraid to introduce an error.

So the lines were

UInt_t hit =tdcSE[i][j];

changed to 

UInt_t hit =tdcSE[i][j];
hit = hit + 70;

Plesaede note that you need to recompile and check and set all conditions for the time-preak window.

So , you now use the analysis in 208Bi1
  83   Fri May 27 20:39:50 2022 CarstenAnalysisShort Manual for updated Go4 DAQ (version 2022_05_27)
Short descriptions of the most recent version of the GO4 code is attached. I will install the corresponding vesion early on sunday.
  91   Mon May 30 19:00:19 2022 CarstenGeneralScraper Settings and Parameters for the last measrements with thick target
old Bunch frequency: 1.98777 MHz

Positions PL devices:
GE01DD2AG -23
GE01DD2IG 3
GE02DD2_G -35
GE02DS3HG 0


The voltages of the particle detectors were set to:
SA_SZ: 1500V
NA_SZ: 750V
But for the primatry beam measurements the detectors were still switched off

Set values for cooler:
SC3: 223513.377 + DeltaU = 160V
SC6: 223452.14 + DeltaU = 130V
SC9: 223452.14 + DeltaU = 130V

Electron current:
SC3: 300mA
SC6: 100mA (300mA in the second file)
SC9: 100ma (300mA in the second file)

Cooling in SC4: 550x
Cooling in SC7: 50x

Explanation of subchains:
SC4: Cooling at injection orbit
SC5: Ramp to central orbit
SC7: Cooling at central orbit
SC8: Scrapers /particle detectors in, XUV detector in, (~10s), bunching on
SC9: measurement
SC10: not used
SC11: Scrapers/particle detectors/XUV ectros out (~10s), bunching off
  93   Mon May 30 20:58:26 2022 CarstenAcceleratorNew Settings for 208Bi Beam
Old SetParameters.C and old SetConditions.C were saved as SetParameters_209.C and SetConditions_209.C

The ion beam settings were changed to 208Bi82+:

SIS energy now: 554.6 MeV/u (was 551MeV/u) + 3.6MeV/u
Cooling voltages were increased by 1830V, i.e.
Delta U SC3: 1990V
DeltaU SC6 / SC9 : 1960V ???
The new frequency is 1.99236615 MHz

DD2AG xx
DD2IG xx
DD2_G xx
DS3_HG xx

SIS intensity is still only about 1e8
  110   Thu Jun 30 11:12:21 2022 CarstenAnalysisUpdated Go4 Analysis with small Bugfix (PMTOverWavelength SPectra)
Here attached is a more recentversion of the Go4 Analysis Code with some smaller bugfixes.
For adaequate *.C files please have alook in 208Bi go4 directory on the atplaser account.
Please note, that there is also a (not fully up-to-date) description/manual somewhere here in the Elog.
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