Minutes of Weekly JLC Physics Group Meeting

A Special One-Day Seminar

Place: 3F Bldg 3, KEK
Time:  9:30, 98/08/28

[0] Agenda
   0.1) Vertex Detector
   0.2) Central Tracker
   0.3) Calorimeter
   0.4) Event Generation, Simulation, and Analysis
[1] Vertex Detector

[1-1] Possible Technologies for JLC Vertex Detector (Y.Sugimoto)

   Y.Sugimoto reviewed various candidate technologies for the
   JLC vertex detector: hybrid or monolithic pixel sensors and CCD.
   His summary can be found in
[1-2] R&D for JLC Vertex Detector

   T.Tsukamoto summarized the R&D so far carried out by the VTX
   group and clarified the remaining issues.
   The group has been pursuing the possibility of room temperature
   operation, taking advantage of the MPP mode.
   A spatial resolution of 3 microns or better has already been
   achieved with a 24x24 microns**2 CCD in beam tests.
   Remaining R&D items include radiation hardness and faster readout
   His talk will be available as copies of transparencies on a web

[2] Central Tracker

[2-1] Various Possibilities for Linear Collider CDC (Y.Kurihara)
   Y.Kurihara reviewed CDC designs so far presented at various linear
   collider related meetings: a TPC for TESLA and a solid state
   tracker  for NLC as of Snowmass 96. He then summarized why the
   JLC CDC group decided to study the current mini-jet cell type

[2-2] R&D for JLC CDC (N.Khalatyan)

   N.Khalatyan begins with a list of publications in contrast with
   the main R&D issues: problems originating from the chamber 
   length such as wire sags and tensions, stereo wires, and
   problems concerning the local properties of the chamber
   such as Lorentz angle, gas gain, two-track separation, etc.
   You can find more information at

[3] Calorimeter [Y.Fujii]

   Y.Fujii reviewed possible technologies for JLC calorimeters.

   tile fiber:  capable of operation in B=2T, hermetic, but with
   		low light yield requiring a goo amplification
		device. ---> the current choice,
   Shashlik  :	highly granular but singular at fibers, bad in e/h,
   Liq.Ar    :	having an existing proof of H1 but software weighting
   		being essential,
   in the context of the present calorimeter R&D.
   You can learn more from the CAL group's web pages:

[4] Event Generation, Simulation, and Analysis (J.Kanzaki)

   J.Kanzaki reviewed the current trend in computing and analysis
   for HEP experiments in the world. The trend is called "Object-
   Oriented Programming". He examined the necessity of the OOP and
   discussed possible strategies for the shift to the OO framework.