Message-Id: <200008141149.UAA14698@neutrino.kek.jp> Subject: Minutes of SciFi weekly meeting (00/Aug/13) Date: Mon, 14 Aug 2000 20:49:30 +0900 From: Makoto Sakuda <sakuda@neutrino.kek.jp> Subject: Minutes of SciFi weekly meeting (00/Aug/13) 1. Tracker (B.J.Kim) BJ.Kim and SNU group started a close check of the tracker by scanning MC events. The purpose is to establish 1-track and 2-track QE event samples. First, he will figure out a good cut to reject or identify secondary tracks. We will study it with better accuracy than 5%. 2. Water leak problem We checked the volume of Scifi tubes last week. We needed only 3 litters or so of water to fill the sight tubes. 3 litters/(5tons fiducial volume) is less than 0.1%. In fact, 3 litters are needed to fill the sight tube, not to fill the volume of aluminum tube. If one tube is empty, we would need 20 litters. >"Our SciFi volume is unchanged as compared to the > volume half a year ago within a few x 10^{-3}". > ------------------------ > This is one important result that we found last week. There are some suspect tubes which may have a leak. In fact, we found a few hundred cc of water in one IIT container. We will locate which one is really leaking. More accurate numbers will be reported by Iwashita/Yokoyama. 3. Selection Ishida checked SciFi*LG connection and upstream veto cut. More detailed report later. 4. SciFi*MUC connection Iwashita scanned those events which failed SciFi*MUC matching condition. He finds that they are neutrino interactions in SciFi which overlap with muons from 1kton. They are not simulated in MC. After subtracting those events, he sees the consistency in chi^2 distributions between data and MC. //
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