Spot++

Purpose: to check the rastered beam size.
CASE 1 If you run with T1 trigger and target in place, spot gives a view of the target density.
CASE 2 If you run with pulser trigger T8 spot++ gives a view of the rastered spot size.
At 20 nA the BPM plots look funny (= no signal)
Note: Scintillator HVs (S0A,B and S3 in each arm) need to be on to do spot++
In case 1 or 2 above, the most important plot is on the first page, titled "beam on target y vs x", for example:

How To Run spot++

You need to be logged on to the a-onl account
- ssh –X aonl@aonl2 –l a-onl
If part of a Beam Recovery procedure, make sure you have taken a CODA run in counting mode for the LHRS
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
Plots should pop up after a few seconds
When prompted, type y or n to upload the plots to the Elog (or not)

/chafs1/work1/spot/

/adaqfs/home/a-onl/rastersize/

Notes to be incorporated into the above list:

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).

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

Low Current running Cavity BCM nominal points
- The cavities are used in <0.5 uA running territory (for commissioning a lead target with spot ++ check)
Bob's EPICs variable printing to terminal script:

ssh apar@adaq
~/scripts/showCav.C