Difference between revisions of "DIRC Expert Instructions"

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= Instruction on Special Procedures and Operations =
  
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Threshold Scan Procedure (2/14/19):
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* [[Threshold Scan Procedure]]
  
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# Stop the rcGUI if there’s anything running
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* [[LED Run Procedure]]
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# On rcm GUI, change “SETUP” to hd_all.tsg_dirc (note: lower case dirc, upper case version hd_all.tsg_DIRC is for production), change “CONFIG” to DIRC_calib.conf. Then press “START” to start the rcGUI.
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# Find the CREATE_ROCDIRC terminal and be ready to monitor it.
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# On rcGUI, go through the normal procedure of “Configure”, “Download” and “Prestart”. After pressing “Prestart”, the threshold scan should start, and numbers will pop up in the CREATE_ROCDIRC terminal, and the rcGUI will show “waiting for… ROCDIRC” as the threshold scan is being conducted.
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# As the threshold scan begins, there are several things to note:
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#* in the CREATE_ROCDIRC terminal, we will see the progress with the scan. The scan will start with slot 4 with threshold values from 150 to 250, and then move on to slot 5 with threshold values again from 150 to 250. A lot numbers will pop up: for each row, it will show the slot, threshold, and scalar rates etc.
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#* the DAQmon GUI scalar rates should freeze as the threshold scan is in progress
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# After the scan is done, the data will pop up at: /gluex/CALIB/ALL/DIRC and will look something like “dirc_thr_#####.dat” with ##### indicating the run number
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# Go to /gluex/CALIB/ALL/DIRC directory. Convert the text data file to a ROOT tree using the dirc_calib.C macro passing the .dat file as argument. That is, run:
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$ root -l
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root [0] .x dirc_calib.C(“dirc_thr_#####.dat”)
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#* Note: currently, it only works with ROOT version 5. Sergey put a root5_env.csh file in the gluex/CALIB/ALL/DIRC directory, which contains one line of code sourcing the correct ROOT version that runs with this macro. Sergey says he doesn’t know why it doesn’t work with ROOT version 6, but he will take a look.
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# Once the dirc_calib.C macro is run, a root file is produced with the name “dirc_scan.root” and two canvas will show up showing the scan results and two png files (dirc_graph1.png and dirc_graph2.png) of the plots will be saved in the directory. It is recommended to rename dirc_scan.root to something like dirc_scan_#####.root with the run number so that it doesn’t get overwritten.
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# After the threshold scan is complete, the rcGUI will show “Prestart succeeded”. We can continue to move on with the program. Remember to press “STOP” on the rcm GUI, change the “SETUP” and “CONFIG” files to desired ones.
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Sergey noted that if somehow the threshold scan is stopped/interrupted before it is completed successfully, remember to go to the ROC control GUI and double-click rocDIRC and press “Restart shmem_srv” to restart the shared memory. Otherwise, the scalars on the DAQmon will stay frozen.
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= Fixes to complicated Issues =
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[[File:status_of_voltage.png|thumb|400px]]
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Symptom of the problem:
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= Solution =
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* General -> Status of Voltages and then “RESET INTERLOCK” for D2_8_MID (picture below).
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= Installation and uninstallation of South DIR  Box c2r18=
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<p style="color:red"> Since the incorrect installation/removal process will cause serious damage to the fiber or PMT, as the first step of this operation, one must obtain permission from Justin Stevens.</p>
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* Due to the fact the South DIRC box c2r18 doesn't have RTV cookie, therefore, a special installation and uninstallation procedure is required, installation is given: https://logbooks.jlab.org/entry/3860930. (This is for documentation only donot use)
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* See update-to-date instruction: https://logbooks.jlab.org/entry/3862103

Latest revision as of 15:50, 8 January 2021

Instruction on Special Procedures and Operations

Fixes to complicated Issues

Status of voltage.png

Symptom of the problem:

Solution

  • General -> Status of Voltages and then “RESET INTERLOCK” for D2_8_MID (picture below).


Installation and uninstallation of South DIR Box c2r18

Since the incorrect installation/removal process will cause serious damage to the fiber or PMT, as the first step of this operation, one must obtain permission from Justin Stevens.

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