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tuning_the_s800_xdt [2015/10/27 14:24]
pereira [Setting up Reaction Settings]
tuning_the_s800_xdt [2015/10/27 16:42]
pereira [Send beam to FP]
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       * Expected "open" values for top and bottom slits are CT ~6.8 and CB ~3.2, respectively        * Expected "open" values for top and bottom slits are CT ~6.8 and CB ~3.2, respectively 
  
-  * Ensure that CRAD04 (typically connected to object scintillator) is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator)+  * Ensure that CRAD04 is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator)
  
   * Remember: S800 FP rate limit is **6 kHz**   * Remember: S800 FP rate limit is **6 kHz**
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           * They correspond to the non-dispersive position of the beam in the CRDCs.            * They correspond to the non-dispersive position of the beam in the CRDCs. 
  
-{{:wiki:CRDCS-example.png?850|CRDCs summary spectra}}+{{:wiki:CRDCS-example.png?850|S800_CRDCS.win SpecTcl window}}
  
  
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   * Reaction setting to FP    * Reaction setting to FP 
       * Start with Attenuator setting of unreacted beam and step up in intensity       * Start with Attenuator setting of unreacted beam and step up in intensity
-      * Looking at **CRDC1.RAWS** and/or **CRDC2.RAWS** SpecTcl spectra (shown in **S800_CRDCS.WIN**), set up beam blocker (labeled I255 Slitsin the S3 page of Barney, if necessary+      * If necessary, set up beam blocker looking at **CRDC1.RAWS** and/or **CRDC2.RAWS** SpecTcl spectra (see **S800_CRDCS.win** SpecTcl window shown above 
 +          * Click on label **I255 Slits** in the S3 page of Barney
           * Expected "open" values for top and bottom slits are CT ~6.8 and CB ~3.2, respectively            * Expected "open" values for top and bottom slits are CT ~6.8 and CB ~3.2, respectively 
           * Expect to see unreacted beam if reaction setting is within +/- 3% of unreacted beam setting           * Expect to see unreacted beam if reaction setting is within +/- 3% of unreacted beam setting
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- 
- 
-====== Follow-up ====== 
- 
-  * Before leaving beam with experimenters 
-      * Set up current trip points on Linux HV controls 
-          * Values used for K-48 
-              * 5 for CRDC and Ion Chamber anodes and intermediate image ppacs 
-              * 50 for CRDC drifts 
-              * 80 for IC drift 
-          * Ensure alarms are running 
-              * Make sure Linux HV GUI alarms are enabled 
-              * Make sure threshold on isobutane level is set up (not currently connected to alarms because they give too many false alarms when communication is lost) 
-          * All logs are being recorded 
-              * There is no log file for biases controlled by Labview 
-              * Linux HV 
-              * LabView gas handling system 
-              * Note in logbook 
-                  * Scintillator biases 
-                  * IC gate biases 
-          * Post reference printouts for experimenters 
-              * HV status: a snapshot of HV GUI 
-              * Gas handling system status: a snapshot of LabView window 
- 
-  * Create window configuration with summing regions to make it easier for experimenters to track efficiency/performance of all detectors 
- 
-  * Setting up coincidences for additional reaction settings in an experiment 
-      * Do not need to redo coincidence settup if secondary beam does not change 
-      * Might need to redo coincidence setup if secondary beam changes drastically 
- 
-  * To watch during experiment 
-      * Look for isobutene running out – messes up data over several hours 
- 
-  * Implementing dE- or TOF-based corrections is part of EXR  
- 
-More detail needed 
- Minimum rates required for coincidence setup 
- Selection of appropriate substitute reactions for coincidence setup 
- How to feel comfortable that there will not be a problem with FP detector gases running out 
- Starting alarms 
- Starting logging 
  
  
  
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj