Date: Wed Jan 14 2004 - 18:33:16 EST
Ok, I don't think it's the TRMRS that's the problem. I've looked at the pad hit distribution and there are some clear gaps. I guess some of the readout boards are not working well. The attached plot is for run 9562. Cheers, Claus On Wed, 14 Jan 2004, Claus O. E. Jorgensen wrote: > > Hi, > > I've looked a bit into this. Insted of plotting the origin of TPM2 tracks > I plotted the origin - x*sin(theta) to try to point back to TRMRS. If I > put x=15 I get a well defined gap in the distribution. I'm not sure I > understand the 15 cm, I guess the distance from the middle of TPM2 to > TRMRS is much larger. Any ideas? > > Claus > > > 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. > > _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-l
