Fast Monitoring System - PXI

How to Run the EPICS Control

Start EPICS Control

1. Log onto gluon01.jlab.org using username halld from any Linux terminal, ask Elliott if you do not know the password.
2. Type css & to start the Control System Studio.
3. If PXI control is not already loaded, click File -> Open File in the top left menu, open ~halld/CSS-Workspaces/Default/Hall-D/PXI/PXI_Status.opi.

Use EPICS Control

Make sure that the PXI's heart beat is blinking, and all the EPICS channels are connected

Main Screen

The main screen give you the accesses to PXI control, ROOTFile Recording, strip-charts for CPU usage,magnetic current, field strength, pickup coil signals and buttons to open other strip-charts for sub coil voltages and voltage ratios.

To Start DAQ

1. By default, the PXI-DAQ should be running, if not, hit Start to start the DAQ process, you should see that the status changes from System Standby to Initialize DAQ to DAQ Running

Calculate Offsets

1. Make sure magnet is in a state that the all signals remain zero,
2. Stop running DAQ proccess by hitting Stop,
3. Click zero button to start zeroing process, the status will change from System Standby to Initizalize to Zeroing. After about 1 minute, the zeroing process should automatically stop and System Standby should be shwon then.

Reset Offsets

1. Stop DAQ
2. Click Reset Offset button
3. Start DAQ

Fake Turn-to-Turn Short Alarm

1. The feature only works during a normal DAQ process
2. Click T-2-T Alarm to trigger an alarm
3. Click T-2-T Alarm again to return to disable the fake alarm

Open Strip Charts for Voltage Taps

1. Click Open Sub Coil Chart

==== Open Strip Charts for Total Voltage and Ratios of Voltages

1. Click Open Voltage Chart button

Start or Stop ROOTFile Recording

1. ROOT Files need to be recorded for offline analysis, start a new ROOTFILE everytime a new ramp up starts from 0 A.
2. Check the status of ROOT File Recording, if it says Idle .. Click to start new file, then click the button, acknowledge the popup message to start a new ROOTFile. The button should then say Writing Data .. Click to stop.
3. Then one need to check the existance of the new file, in a Linux terminal, log onto gluon01 again,
4. Stop ROOTFile writing by click the button after the current ramps down to 0 A.

How to Analyize ROOT Files

List of ROOT Files

• entry on HallD-ELog