Beam and Hall checks

In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.

PREX Main<< Information for Shift Takers << Shift Leader << Shift Checklist

Figure 1 - Alarm handler window when there is a red alarm. If nothing is alarming, it would be grey.

Figure 2 - The beeamline section in the Hall A Tools window.

Figure 3 - A picture of the scope when the raster is off. This would be BAD if beam were on!

Figure 4 - Picture of the BCM temperature readout in the computer room.

Figure 5 - Snapshot of the Fast Feedback Controls when the FFB is OFF.

Figure 6 - The gas section in the Hall A Tools window.

Figure 7 - Camera and alignment info in the Hall A Tools window.

Figure 8 - The VESDA panel in the counting house.

Figure 9 - Where you can find the camera display and the controls in the counting house.

Figure 10 - The camera controls.

Alarm Handler

• Is alarm handler running on hacweb7?
  • On hacweb 7, you should see a window in the upper right corner of the screen
    • Look first in the "Alarm Handler" desktop to see if it is there
    • Check all the windows if not
  • If not open, see Alarm Handler
• Is the volume up on hacweb7? (both hardware and software)

Hall A Tools and related menu screens

Beamline

• Beam Energy (GeV) (see Figure 2)
• Beam Current (µA)
• Beam Position Monitor (BPM) X/Y (mm) A
• Beam Position Monitor (BPM) X/Y (mm) E (Called BPM B in Hall A Tools)

• Downstream raster (B) on? Yes/No (upstream raster is not in use)
  • when raster is off, looks like Figure 3
  • when raster is on, something like halog 3654466
• BCM temperature (K) (PV, PS, Thermocouple)
  • If these differ by +/-.5 from (110.0, 110.0, 115.0) (Fahrenheit) contact RC and halog
  • These temperature readbacks are located in the middle DAQ room, in rack CH0B06 (far left) at the very top (see Figure 4)
  • It is important that these temperatures stay stable within 0.5 Fahrenheit or else the BCM current readout will become uncalibrated
• Raster size (x:y mm, see log 3654466)?
• Fast feedback (FFB) on? Yes/No
  • To check whether the FFB is on or off
    • in a terminal window, type JMenu
    • search for "fast"
    • Choose "Fast Feedback Control" (see Figure , which is for FFB OFF)
    • The status is indicated by the button that is depressed (OFF and RUN in the figure)
  • FFB should be ON during normal production running!
  • However, FFB will be paused during beam modulation
• Arc energy NMR locked?
  • Go to ARC or the "Field Management Screen"
  • Verify if the box locked is ON/OFF

Gasses

• Pressures (see Figure 6)
  • Argon pressure (psi)
  • Ethane pressure (psi)
  • CO2 pressure (psi)
• VESDA System OK? (see Figure 8)
  • VESDA is the smoke/fire detection and alarm system
  • Check the Hall A VESDA Console on the wall behind the door

Hall/Counting House

• Visual Hall Inspection OK? (see Figure 9)
  • Make sure to move the camera around and zoom in (See Figure 10)
  • when complete, zoom all the way back out
• Current Target (snapshot)
• Septum current (A) and polarity?
• Upstream/downstream corrector currents (A) ?

Next in checklist >> Parity Checks