Muon Identifier Blue Logic Trigger Instruction
Operating Instructions

Last modified by V. Cianciolo
Sunday, 13-Feb-2005 16:26:52 EST

Special Note

The SL should monitor the muid trigger rates on the 3rd flat panel display above the DAQ console. If the rates drop suddenly, ask the OS to review the north and south muid trigger circuit efficiencies. The OS should frequently monitor these values in any case. If any of the trigger circuit efficiencies are less than 0.93 (after allowing for enough statistics to be accumulated), the DAQ operator should execute these instructions and proceed all the way through the set_all step (even if the verify was OK). He should make a note in the PHENIX logbook to indicate whether the verify had indicated that things were OK and the time at which the download was done.

However, if the trigger circuit efficiencies look OK, then one should not routinely perform these instructions because occasionally the MLUs can have trouble loading.

Verify and Download

You can only do this procedure when the DAQ is not running. Read the note above and only do this procedure when necessary.
  1. Login to phoncs0 using the phoncs account: 
    ssh phoncs@phoncs0.phenix.bnl.gov
  2. Login to iocondev9: 
    rsh iocondev9
    If this fails, other people may be logged into iocondev9. Ask them to logoff. Try again. If this still does not work, you will need to cycle the power on WCB2 and try to log in again. Be patient after cycling power. It takes a couple of minutes before you can log in.

    If you cycle the WCB2 power, you _must_ refeed the ERT afterwards by pressing the ERT.W button.

  3. After you see a prompt "->", move to target directory 
    cd "/home/phnxmuid/blt" (include quotation marks when executing command)
  4. Download program 
     ld < mlu (Eliminate spaces when executing command.)
  5. Verify memory contents. 
    verify_all()
    If the following message is shown, there is no error detected.
    Process to step 7.
      ************************************************************
      *MuId BLT is verified completed, ready to run. *
      ************************************************************
    If the following message is shown, there is an error.
    You must download the memory contents. Proceed to step 6.
      ************************************************************
      *ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR *
      * MuId BLT verify has error, Call MuId Expert *
      ************************************************************

  6. Download memory contents. This command includes verification of the memory contents again. 
    set_all()
    If following message is shown, download is completed. Process to step 7.

    If following message is shown, the download failed.
    You have to download again. Please, put all error messages into the logbook.

    If the download fails three times, call the MuID expert.

  7. After you finish download or verify, you must quit from iocondev9. 
    logout
  8. If you completed these operations successfully you can once again collect data. If problems persist with the Trigger Circuit Efficiency call a MUID expert.

Cold start or Access trouble case(Experts Only!)

When you need to start from all power off state, this procedure will work. Also if you have a trouble to access to the CAMAC, this will work.
  1. Turn on VME crate
  2. Turn on CAMAC crate
  3. On CAMAC crate, most right hand slot is controller. Turn toggle lever switch to "OFFLINE"
  4. Push "Z" and "C" switch simulteniously.
  5. Turn toggle lever switch to "ONLINE"
  6. You should be able to access to CAMAC module.

Configuration File Changing (Experts Only!)

To change the definition of the shallow BLT trigger, a MuID expert (only!) may execute the following commands:
  1. Login as phoncs on phoncs0.
     	ssh phoncs@phoncs0.phenix.bnl.gov
  2. Go to directory /home/phoncs/kamihara/AT_test
    	cd /home/phoncs/kamihara/AT_test
  3. Overwrite the shallow.dat configuration file. To redefine the shallow trigger and implement the new "Last Gap 2, Missing Hits 2" configuration file, type
    	cp shallow_lg2mh2.dat shallow.dat
    To undo this change and revert to the Run 3 standard version, type 
    	cp shallow_hiroki.dat shallow.dat
After doing steps 1-3, in order to invoke the change, you must download the MLU contents as described above.

Configuration (Experts Only!)

  1. login phoncs0 with phoncs account 
    ssh phoncs@phoncs0.phenix.bnl.gov
  2. change working directory 
    cd /home/phoncs/kamihara/AT_test
  3. choose full or small acceptance
    • full acceptance, for collision. 
      source cosmic.csh
    • small acceptance for special case. 
      source cosmic_center.csh

Hardware

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