[Brahms-dev-l] TPM2 calibration or inefficient TrMrs ???

From: Hironori Ito <hito@rcf.rhic.bnl.gov>
Date: Wed Jan 14 2004 - 13:42:09 EST
Hello. (While some people are enjoying BRAHMS fame in  sunny 
California,) I was looking at TrMrs detector.  I noticed that the 
matched track x position in TPM2 has holes (not flat).  I traced back to 
that it is simply coming from the local tracking and not from matching.  
See the figure below (it is from local tracking  (from histogram created 
during creation of ltr files)). 

  

This odd distribution is not seen in TPM1 track x distribution. (see below.)



We must understant this before taking anymore data.  Is it some wrong 
calibration from TPM2 or are some slats in TrMrs inefficient? If the 
later is the case, why is it not seen in the TPM1 distribution?   Help 
from experts is greatly necessary!!!  (unless this is normal.)  I will 
check the TrMrs Hit distribution next.



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Received on Wed Jan 14 13:43:56 2004

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