What a BoNuS Shift-Taker Should Know

http://www.jlab.org/~hcf/bonus/CLAS_05/expert_knowledge.html

INITIAL RTPC TURN-ON PLAN is posted HERE.

When to ask for help from a RTPC expert!

• When you are unsure or cannot find what you need to know on this page or the links from it.

RTPC High Voltage System (HVPS)

• How to read the high voltage power supply setpoints and readbacks of voltages and currents, both using the control software and using the front panel of the HVPS.

• How to set HVPS voltages, ramp rates, and trip currents.

  • CAEN HVPS manual

  • BoNuS HV Control Writeup

• What are the nominal RTPC high voltage settings for the present run conditions.

• Whether or not the observed currents and voltages are within tolerance.

  • Posting in counting room and on web page

• How to determine what the normal currents are at any set voltage combination.

  • Spreadsheet posted on the web

  • OpenOffice Spreadsheet

• How to start up the monitor / control / logging software for the RTPC high voltage.

  • BoNuS HV Control Writeup

RTPC Gas System

• What the normal RTPC gas flow rates and pressures are

  • Posting in counting house and on web page

• How to read the current conditions.

• How to adjust RTPC gas flows and pressures.

• How to start up the monitor and control software for the RTPC gas system.

• How to reboot the gas system PC.

• How to monitor the bottle contents of the helium and DME.

  • Gas System TOSP

  • TOSP Figure: Gas System Schematic

  • Gas Controls Instructions

Detector and Target Temperature

• How to start up the detector head temperature monitor software.

  • Temperature Monitor GUI Writeup

• How to monitor the detector head temperatures, what the limits are, and how to shut off the power if a limit is exceeded.

How to monitor and operate the target gas system

• Target Gas GUI Writeup

• Read target pressure

• Know what gas is in the target

• When and how to add gas to the target

• How to monitor the target gas supply bottle pressure

• How to start up the monitor/control software for the target gas system

DAQ

• How to run / restart / monitor the BoNuS DAQ

• DAQ Writeup
  

• How to tell if the BoNuS detector is operating normally

  • Jixie's Monitor Writeup

• How to generate and examine BoNuS Pulser Triggers

BEAM

• How to tell if the beam conditions are correct

  • Current

  • Position

  • Focus

  • Halo

What a BoNuS Shift-Taker Should DO on Shift

• Continuously watch the relevant conditions, take necessary action if a parameter is out of tolerance, and regularly record them in the detector log:

  • Detector HV and currents

  • Detector gas composition, flow, pressure

  • Detector head temperatures

  • Target gas composition, pressure

  • Observe RTPC displays and estimate the occupancy (number of min-I and heavy-I tracks per event)

  • Check for new hot or dead channels in the RTPC. Take action if there are significant changes.

  • Beam current, position, halo

• Verify that BoNuS DAQ is running normally

• Satisfy yourself that the operation of CLAS is under control