From: W.J. Llope (llope_at_physics.rice.edu)
Date: Thu May 29 2003 - 15:44:47 EDT
At 1:05 PM -0500 5/29/03, Geary Eppley wrote:
>Hi Zhangbu et al.
>
>According to Bill Christie, we should get access to the STAR detector
>about 4 pm tomorrow afternoon.
>
>We should plan at that time to take noise rates for the 12 modules that
>are being read out. I think an "or" of the 6 channels for oeach module
>will be sufficient, unless the rate is unusually high or low in which case
>we might want to look channel-by-channel.
since it takes ~20sec per ch to measure a ch's rate, can't we
just go ahead and take the ch-by-ch numbers?
rates by module would also be interesting to study possible correlated
noise...
> We probably should also take
>noise rates from 2 or 3 high-eta modules that were not included in the
>read out. These modules had noise rates that were 2x the low eta module
>rate but the high eta module that is read out now has a low noise rate so
>we should verify if this problem has gone away.
indeed. that would be rather interesting if (re) confirmed!
>We might also try to do some tests to see if the correlated noise is in
>neighboring channels in a module.
yep.
>I also would like to turn off the HV and measure the noise rate decay
>in the scaler.
good idea!
cheers,
bill
>I have to go to JFK at 6:30 so if we don't finish by then, we will need a
>TOF gas shift until I get back about 10. I can finish anything else we
>want to do by midnight, then shut off the gas.
>
>Cheers,
>
>Geary
--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 6100 S. Main St. Houston, TX 77005-1892 e-mail: llope_at_physics.rice.edu WWW home: http://wjllope.rice.edu/default.html
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