More ZDC calibrations done

From: Michael Murray (murray@CyclotronMail.tamu.edu)
Date: Thu Jun 20 2002 - 10:06:38 EDT

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       Dear Brahmen,
              Andrei had trouble sending this to BRAHM-dev-l
so I am sending it.
                Michael

Hello,

I commited to the database slew corrections and z-offsets
for the runs 5361, 5362, 5367 and 5368.

For these runs and also for runs 4640, 4713 (I will commit data
for them tomorrow) the first module in right ZDC does not nave
a signal, so I used the averaged time from modules 2 and 3. That
required a small change to the BrZdcRdoModule.cxx, which I
commited to CVS. This didn't affect much quality of the data.
Here I list the obtained offsets:

Run#    Offset  Sigma

5361    12.36   2.55
5362    3.49    2.59
5367    0.93    2.64
5368    10.44   2.52

The 11 cm difference between adjacent runs tells that z-offset
calibration should probably be done for every run (or as often
as possible).

As soon as I'll finish with 4640, 4713, I'll (try to) produce
calibrations for the runs about ~3925 (for Ian Bearden).

I also attached here a (Zzdc- Ztpm1) dist-n for the run 5368.

Andrei.

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----- End forwarded message -----



Michael Murray, Cyclotron TAMU, 979 845 1411 x 273, Fax 1899

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