Re: TOFr TDC range

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From: W.J. Llope (llope_at_physics.rice.edu)
Date: Thu Apr 24 2003 - 12:06:05 EDT

hi - i took a quick look at the tdc data zhangbu et al collected
yesterday...... just fit a few chs, results below; a job over all chs
and with more precise fitting is running now.. i attached some gifs...

there is the expected nonlinearity below ch ~50-100...
and also as expected the slopes are all over the map... cheers,
        bill

chan slope (TDCch/ns) slope (ps/TDCch)
0 -2.09329e+01 47.8
1 -2.07629e+01 48.2
21 -2.07144e+01 48.3
41 -2.17165e+01 46.0
61 -2.10009e+01 47.6
71 -2.17368e+01 46.0

At 10:08 AM -0400 4/15/03, W.J. Llope wrote:
>[snip]
>but (because we knew better) we are not using fastbus tdcs in STAR...
>the camac 2228A's are not nearly this bad. the most
>one ever might want to avoid is the first ~50-100 chs
>which is <5% of the dynamic range.
> 

-- 

  W.J. Llope, Ph.D.                      Res. Assoc. Professor
  T.W. Bonner Nuclear Laboratory         phone:  713-348-4741
  Rice University, MS-315                fax:    713-348-5215
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  Houston, TX 77005-1892            
             e-mail:     llope_at_physics.rice.edu
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