Message-Id: <200009120336.MAA29997@neutrino.kek.jp> Subject: Minutes of SciFi weekly meeting (00/Sep/12) Date: Tue, 12 Sep 2000 12:36:55 +0900 From: Makoto Sakuda <sakuda@neutrino.kek.jp> Minutes of SciFi meeting (00/Sep/07-09 and Sep.12) 1. Gain variation *Ishida calculated the efficiency of each IIT using cosmic-rays at each period from March to June, 2000. There is no sign of aging (attenuation of gain). The result of efficiency plot shows the systematic error to efficiency (<5%). IIT8 and 17 shows a low efficiency in one period. He relaxed the filter condition for these two IITs and obtained the efficiency of 0.95 and 0.98. Noise will be checked. *Jeon will calculate the efficiency the same way as Ishida, using 1-track sample, every week. ->Yokoyama will analyse cosmic-ray data from Nov99 to Feb00. 2. Satellites and noise *Iwashita studies noise tracks using cosmic-rays data. Chi^2, delta-x for matching scifi-veto, Npix (x) and Npix (y) will be studied. He showed the averaged Npix(x) and Npix(y). After a good matching between scifi and veto, no tracks have <Npix> less than 25. *EunJu will check the same thing in her 1-track sample. *Ishida/Iwashita will generate cosmic-ray MC with various sets of satellite fractions. 3. Tracking and Analysis *SNU group compared the result of scan and the tracker carefully. Park improved the tracker after considering SNU group (BJ.Kim)'s result of scan. It has now efficiency>0.9, with the same S/N, for 2-track sample. We need to fix the veto of MUC hits in LG 2-track sample. *Boyd confirmed the Park's energy spectrum. 4. fgsim (MC) NEUT2.6/NUANCE samples were made by Ishida. //
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