Difference between revisions of "Taking MAIN detector Counting Run"
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* Set the HV for DN-Quartz (MAIN) detectors in both arms to -1900V (as explained in [https://prex.jlab.org/wiki/index.php/HVgui HVgui]) | * Set the HV for DN-Quartz (MAIN) detectors in both arms to -1900V (as explained in [https://prex.jlab.org/wiki/index.php/HVgui HVgui]) | ||
** L1.1 channel in S1 (Slot1) in each arm HV GUI | ** L1.1 channel in S1 (Slot1) in each arm HV GUI | ||
| + | [[File:RHRS_HV_GUI.png|thumb|600px|right|Image 1]] | ||
* Enable the HV channels | * Enable the HV channels | ||
* Turn ON scintillators | * Turn ON scintillators | ||
Revision as of 00:23, 14 December 2019
- Set the HV for DN-Quartz (MAIN) detectors in both arms to -1900V (as explained in HVgui)
- L1.1 channel in S1 (Slot1) in each arm HV GUI
File:RHRS HV GUI.png
Image 1
- Enable the HV channels
- Turn ON scintillators
- Turn ON VDCs (NOTE:Make sure the scintillator rate is below 500k before turning VDC ON)
- Take counting runs on both arms (LHRS and RHRS) atleast 200k events
- To analyze the runs:
- ssh -Y a-onl@aonl1
- goprex
- analyzer -l
- .x setup2.C(runNumber,200000)
- To produce plots:
- In a-onl@aonl1 machine:
- cd devi/crex/alignment
- analyzer prex_counting/prexLHRS_runNumber_200000.root for LHRS
- analyzer prex_counting/prexRHRS_runNumber_200000.root for RHRS
- .x alignDS.C
- Note: please don't modify the macro, if you want you can copy it to your directory and modify there
- Look into the elastic peak and read the edge of quartz (the intersection of red and blue histograms in "Projected x on detector plane" plot)
- Zoom in to see the precise edge
- When you are done with taking counting data turn OFF the DN-Quartz (MAIN) detectors HVs
- NOTE: never turn ON DN-Quartz HVs during high current production running keeping them at higher HV (they will die)
- For safety, set their HV t0 0V at the end
