User name R. Michaels
Log entry time 01:21:34 on July16,2005
Entry number 148120
keyword=profile scanner checks
With UMass crew (Kirsten, Peter, Jason, Keith)
Run 2057, we moved X,Y and look for correlations to triggers & VDC.
Move L-arm X in positive direction events up to 4000.
Move R-arm X+ 10k -> 15k
Move L-arm Y+ 18k -> 23k
Move R-arm Y+ 27k -> 30k
Moving both to ~middle 37k -> 44k
Then up to 50K events and beyond we stay in the "middle".
This was promising -- we see ADC spectra that looks ok, etc.
But scalers update at only 0.25 Hz, so we went too fast.
Next, a series of runs with only Qsq scanner trigger, and
only one position each run.
Run ..... Left Position (x,y) ..... Right (x,y)
2058 ..... 20, 27 ............. 20, 27 ... saw no rate in scalers
Now we see no rate. Will do a scan to find the particles.
In the meantime, fig 1 shows for one arm the L-arm X-Y distribution
for all triggers and fig 2 for the L-arm scanner trigger when
it worked and when it was parked in one spot. R-arm is similar.
It picks out one small spot.