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Weekly JLC Physics Group Meeting
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Place: 3F Bldg 3, KEK
Time: 10:30, 97/06/06
[0] Agenda
0.1) CAL R&D Status
0.2) VTX R&D Status
[1] CAL R&C Status (Suzuki)
The beam run started on May 24 and finished on June 2.
In this beam test, emphasis is put on the measurements
of the calorimeter response in the scintillator-rich
region. The measured points are as follows:
Pb:Sci = 6mm : 2mm
= 10mm : 2mm
= 8mm : 2mm
= 4mm : 2mm
Pb:Sci = 16mm : 6mm
= 16mm : 4mm
= 16mm : 2mm
In addition, EM(4:2)+HD(8:2) configurations were
tested, varying the radiation length of the EM section
from 20 X0 to 30 X0.
In spite of a lot of hardware troubles with readout
electronics, the data taking was completed more or
less as planned. Online monitor assured the quality
of the data, but solid conclusions must await detailed
analysis. First results are expected in one week.
[2] VTX R&D Status (Tsukamoto & Miyamoto)
Tsukamoto explained the goals of the beam test and
Miyamoto reported its current status.
To be tested in the beam run are
a) Temperature dependence (-15 C -> 25 C)
b) Readout time dependence (4sec, 1.3sec)
c) Angle dependence (90, 45, 30 degrees)
for 2 kinds of CCDs, one with 10 micron and the other
with 50 micron thick sensitive regions. Both of them
have 512 x 512 pixels with a pixel size of 24 microns
x 24microns.
10 microns 50 microns 10 microns
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Miyamoto showed some sample beam data, demonstrating
MIP signals clearly separated from the dark current
background. When a single frame data are superimposed
for the three layers, one can see clear 3-hit clusters
corresponding to penetrating tracks.
The beam run lasts till Monday morning.
fujiik@jlcux1.kek.jp