Subject: Minutes of meeting of 21.01.2003
Date: Tue, 21 Jan 2003 18:34:39 +0100 (CET)
From: Friedrich DYDAK <Friedrich.Dydak@cern.ch>
To: ps-proj-hadroprod@listbox.cern.ch

Minutes of the HARP group meeting of 21.01.2003
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1.  F. Dydak apologized for his long period of absence, caused by the
deaths of two family members. He would from now on be present at CERN
again and devote nearly all his time to HARP matters, with priority
for data analysis. He saw his role in the translation of the
strategies set by the analysis coordinators into small but concrete,
palpable and persistent achievements in the daily work. The weekly
HARP group meeting at CERN, held only when no `analysis meeting' is
scheduled, would have an important role for information exchange and
report on progress, and for keeping the Collaboration together.

F. Dydak then said that he saw as immediate task a fast analysis
of e+ and e- produced in the thick-water target. A timing cut would
reduce candidate events to a few hundred, which would be eye-scanned
before further analysis. Further urgent tasks were data quality and
calibration n-tuples for the thin-water target and for the MiniBooNE
data, as well as TPC cross-talk measurements (taken up next week
again by V. Serdyuk) and their implementation in an algorithm
which corrects TPC data for cross-talk.

J. Panman pointed out that the data quality campaign was urgent not
only for selected data, but for all data: people's memory would
fast fade away.

2.  Concerning TPC cross-talk, J. Burguet-Castell and G. Prior explained
that some 60% of the data taken already by V. Serdyuk should be OK,
only the remaining 40% were hampered by a cable which had been removed
inadvertently, and had to be taken again. Still, that would cost some
three weeks of work. J. Burguet-Castell will analyze the data taken
and assure almost online their quality.

A. de Min and U. Gastaldi reported on evidence for a non-linearity
of the TPC preamplifiers. It is intended to take care of this by taking
cross-talk data at three different pulse amplitudes.

(Minutes compiled by F. Dydak)