3rd Arm DAQ for g2p

Normal DAQ Operations

Account Info

• 3rd Arm DAQ is running separately with the HRS DAQs.
  • 3rd Arm DAQ runs on the adaql3 computer on the adev account.
  • 3rd Arm DAQ is using CODA 2.5.

Start and Stop Runs

• To start and stop runs, push the buttons "Start" and "End".
  • No need to use "Prestart", "Start" will do "Prestart" and "Go" in sequence.
  • If the run control is not running, follow the Cold Restart section below.

CODA Configurations

• We are using "thirdarm_buf" configuration for 3rd arm.
  • The configurations should be loaded by default.
  • To change configurations, click on the "Reset" button on the left, then press "Configure" button, choose the configuration from the dialog box, then push the "Download" button.

Editing Prescale Factors

• Login with adev account, type "prescaleTA" to start the GUI. Make changes and click "save" button.
  • Notice T8 is 103.7 kHz fast clock for 3rd arm, so you need to set PS8 to 103 to get a ~1kHz pulser trigger.

Online Scaler Monitor

Start xscaler for 3rd Arm

• Open a terminal, type "ssh adaq@adaql4";
• Type "cd ~/g2p/thirdarm/scaler";
• Type "./xscaler thirdarm" to start GUI.

Definition of Some Entries

• 1~8  : Insert non-formatted text here: E1_R(L)-E4_R(L), hits on E plane PMTs;
• 9  : currently empty;
• 10  : fclock, 103.7 kHz fast clock;
• 11  : L1A
• 12  : trigger
• 13~16: dE1_R(L)&dE2_R(L), hits on dE plane PMTs;
• 17~18: bcm_u(d)1, upstream(or downstream) BCM.

Reboot

Reset CODA

• Click the "Reset" button on the run control interface. You will need to do "Configure" and "Download" again.
• If reset CODA can not solve the problem, try a cold restart, follow the instruction below.

Cold Restart CODA

• To make a cold restart of CODA for 3rd arm DAQ, first make sure you are using adev account on adaql3 computer. If not, open a terminal and type "ssh adev@adaql3";
• On adev@adaql3, type "kcoda";
• Type "startcoda", the runcontrol GUI will pop-up;
  • Press the "Connect" button;
  • When you see the "Configure" button, press it, then choose one configuration ("thirdarm_buf" configuration for usual). Wait for a while.
  • Click on the "Download" button to start download the libraries;
• You have restarted CODA. To start a run, press "Start" button.

Reboot TS ROC

• Third arm only have one ROC, which is ROC12.
• If the ROC hung up, you will need to reboot it:
  • Open a terminal, type "telnet bbps1 2005";
  • Type "reboot" in the ROC's xterm window;
  • Wait until the ROC finished executing the the boot script, you should see all of the commands in the xterm window;
  • If you lost the connection, telnet into the ROC again to verify it is alive.
• If this software reboot does not work, you may need to do a cold restart for it:
  • Find an adaql computer, open a browser, and type "hareboot30" in the address bar;
  • Click the "Outlets" label on the left;
  • Check the box with the label "bbts1", and then select the control action "Reboot immediate", click the "next" botton;
  • Click the "Apply" botton to reboot the crate;
  • After this, open a terminal and telnet into the ROC, then reset CODA following the above instruction.
• You can find the boot parameters here: Boot Parameters for g2p (The last section TS1(ROC12))

Set Run Parameters

Set High Voltage

• To change High Voltage for 3rd arm dE and E plane PMTs (normally you do not need to change this):
  • Open a terminal, type "ssh adev@adaql3", ask the expert on shift if you do not know the password;
  • Type "hvgui_hrs" to start the HV GUI;
  • Click on the tab "hacweb5:2001" to change HV setting;
  • You can find the normal HV setting for 3rd arm here: Halog entry 359864
  • When you start a run, check in the auto halog entry to see if the HV values are recorded properly.

Set Threshold

• The discriminator thresholds for 3rd arm can be controlled remotely (normally you do not need to change this), follow these steps:
  • Open a terminal, ssh to one of the adaql computers;
  • Type "threshold_TA -g dE" to check the threshold for dE(or E) plane;
  • Type "threshold_TA -s dE -350mV" to set the threshold for dE(or E) plane to -350 mV;
  • Notice the range of the thresholds is -1~0V;
  • When you start a run, check in the auto halog entry to see if the threshold values are recorded properly.