Minutes of SciFi weekly meeting (00/Sep/04)

From: Makoto Sakuda (sakuda@neutrino.kek.jp)
Date: Mon Sep 04 2000 - 19:15:59 JST

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    Message-Id: <200009041015.TAA15731@neutrino.kek.jp>
Subject: Minutes of SciFi weekly meeting (00/Sep/04)
Date: Mon, 04 Sep 2000 19:15:59 +0900
From: Makoto Sakuda <sakuda@neutrino.kek.jp>

Subject: Minutes of SciFi weekly meeting (00/Sep/04), 9-10am.
Ishida,Hayato,Iwashita,Park,Yokoyama,Jeon,Sakuda

1. Power failure last Sunday
 I walked down to the basement and checked SciFi Aircon and
aircon for electronics rack. 

2. Gain stability 
Ishida checked the gain factors of all IITs using cosmic-ray 
data, taken every two months or so. EunJu measured the gain
factors of all IITs every week using scifi*veto 1-track sample.
These two gain factors will be compared and the results will 
be integrated in a new gain table. 
Ishida will estimate the efficiency over the period.
The systematic error due to gain variation will be estimated.
Some (3-4) IITs in May show 20% higher gain in cosmic-rays
and 1-track sample. Consistency will be checked.
 
3. Satellite and Noise
Iwashita showed the cluster distribution as function of
distance from the main cluster, in cosmic-ray data and MC.
He also showed Npix. MC showed 30-40% more clusters than
data near the main cluster (=satellites) and MC fairly agreed with data at
farther distance (=noise). He will study the effect on the
tracks quantitatively. We generate a set of MCs with more (or less) satellites.
Boyd is studying the cluster distribution for tuning
satellite Monte Carlo. 

4. Tracking 
 SNU group scanned MC events and showed the list of 
un-reconstructed tracks. Park is studying these events.

5. Comparison of Monte Carlo and Data at the next
collaboration meeting 

*IIT stability and stability of the tracking efficiency
 Npix in cosmic-rays (Data and MC).
*the systematic error due to gain (and threshold) on the tracking.
*Effect of satellites and noise on the muon track and the
 primary tracks from the vertex. 

These items are being studied and the result will be
presented at the meeting. 
Hayato (MC manager) and I agreed on these main issues.  

//M.Sakuda

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