Finally a burst analysis in run 11186...

BAKER@wsgs07.lngs.infn.it
Fri, 3 Nov 1995 18:13:29 +0100 (WET)

GC peoples,

I've been tweaking and twiddling with my analysis software quite a bit,
but I do have a few comments on the latest burst found by the monitor. I
seem to remember Kate saying that the monitor now uses a |TDCZ-ADCZ| cut,
but 3 of the 6 hits in this burst have very large ADCZ vs. TDCZ mismatches.
That gets rid of hits 1,3 and 5. Note that for each of these hits, the
energy reconstructed using the ADCZ is *much* lower than when the TDCZ is
used. The 6th hit reconstructs with TDCZ way outside the tank. This tank
has a lot of TDC underflows. The TDC values for this hit are:

TDC0H 2206
TDC1H 100
TDC0L 2216
TDC1L 3199
ADC0 244
ADC1 104

It seems clear that this is a coincidence of low energy radioactivities,
since ADC1 is near pedestal and ADC0 isn't much better. I think my TDCZ
of 1427.80 is correct.

The 64 MeV hit is cut because there are streamer tube hits on
both the top and bottom of the box (and within 50 cm of the box axis).
That leaves only one hit on box 513 with energy of approximately 10-12 MeV.

Another problem that caused me significant angst... The time
reconstructed by the monitor for the first hit in the burst seems to be
off by almost 4 msec. My burst analysis was using a 2 msec tolerance.
The rest of the SM6 hits are only off by about 1 msec.

Rich

First line is monitor output, last two lines are my values.
--------------------------------------------------------------------------------
1 733 459 0.0000 10.80 405.56 8
HIT NO. BOX TIME ENERGY POSITION CUT
1 459 0.000000 10.68 354.79
4.68 -588.24 ADCZ
--------------------------------------------------------------------------------
12 383 513 0.9137 10.32 517.46 8
HIT NO. BOX TIME ENERGY POSITION CUT
2 513 0.912715 12.37 615.90
11.85 672.16 *Kept*
--------------------------------------------------------------------------------
18 738 414 1.6285 10.19 550.46 8
HIT NO. BOX TIME ENERGY POSITION CUT
3 414 1.628518 12.33 499.17
5.87 -383.71 ADCZ
--------------------------------------------------------------------------------
21 388 568 1.9224 64.87 -114.74 0
HIT NO. BOX TIME ENERGY POSITION CUT
4 568 1.921470 64.31 -116.80
65.58 -65.12 ST T/B
--------------------------------------------------------------------------------
22 389 516 2.1043 10.54 352.31 0
HIT NO. BOX TIME ENERGY POSITION CUT
5 516 2.103336 10.56 279.98
6.32 -255.83 ADCZ
--------------------------------------------------------------------------------
38 396 580 5.7041 17.51 77.50 8
HIT NO. BOX TIME ENERGY POSITION CUT
6 580 5.703139 0.00 1427.80
0.00 -533.61 TDCZ