Spot++

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 << HOW TOs

How To Run spot++

1. You need to be logged on to the a-onl account
   • ssh –X aonl2 –l a-onl
2. If part of a Beam Recovery procedure, make sure you have taken a CODA run in counting mode for the LHRS
3. Then type either:
   • spot_L run# for the LHRS (Recommended)

     spot_R run# for the RHRS

   • If no run # is given, analyzes last run taken
4. Plots should pop up after a few seconds
5. When prompted, type y or n to upload the plots to the Elog (or not)

Notes to be incorporated into the above list:

• Need a link to how to run the HRS CODA

• You can get "strange printouts" of errors if you only type spot++ and the last run was for R-HRS, so it's clearer to do what is listed above than to use spot++. (note, this is because spot++ is actually spot_L).

• Hint: Type "spot help" to learn more options.

More Info

What do the plots mean?

Need to put examples of output when we have them

BPMA y vs x: Shows the beam location at BPM A

BPMA x: Shows the number of events at each x value in BPM A

BPMA y: Shows the number of events at each y value in BPM A

BPMB y vs x, BPMB x, BPMB y: Same as above but for BPM B

Beam at target y vs x, …x, …y: Same as above for at the target

BPMA Antenna 1, 2, 3, 4: Signal at the four wires of BPM A, one for X+, X-, Y+, Y-, respectively

BPMB Antenna 1, 2, 3, 4: Same as above but for BPM B