From: Ian Bearden (bearden@nbi.dk)
Date: Wed Feb 05 2003 - 15:04:11 EST
Hi Peter, Thanks for your write-up. It strikes me that the efficiency is worse for low momentum and large alpha_x. Is this because the multiple scattering is so large that the resolution is bad, and thus alpha_x not reliable for low momentum? It might be interesting to try to look at tracks with small alpha_x (say +-0.05) and see how the efficiency looks as a function of alpha_y. If it is multiple scattering, I guess you would also see this in alpha_y. I also seem to recall that someone (probably JH or Eun-Joo?) has looked at this before, and seen the alpha_x depedence, but I thought that the explanation was something to do with the properties of the TPC. If I were Christian, I guess I would say here that it would be nice if we could search the list server archive but since I am not him, I won't mention it. Cheers, Ian On onsdag, feb 5, 2003, at 20:26 Europe/Copenhagen, Peter H. L. Christiansen wrote: > Hi > > I made a small study on the TOFW efficiency. It seems to depend on the > momentum. A short story and plots can be found at : > http://www.nbi.dk/~pchristi/BRAHMS/TOF/ > > I hope to get some comments, especially from people who has looked at > this before. > > Cheers > Peter > > -- > :-) --------------------------- )-: > Peter H L Christiansen @ NBI > EMAIL : pchristi@nbi.dk > OFFICE : Tb1@NBI (353 25269) > HOME : Vesterbrogade 204, 2. th > PHONE : 40840492(mob.) > :-D --------------------------- \-: > >
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