WE-A7-5 11:00
Resolution Studies In A
MPGD-TPC With Charge Dispersion On A Resistive Anode*, Khalil Boudjemline 1
, ab Bellerive 1 , msd Dixit 2 , jm Miyamoto 1
, er Rollin 1 , ks Sachs 3 , jpm Martin 4 ,
ys Shin 1 , en Neuheimer 1 , 1 Carleton University , 2 Carleton
University - Triumf, 3 DESY, 4 Universite de Montreal — A
large volume TPC may be chosen as the central tracking chamber for the
International Linear Collider (ILC).
The TPC readout will have to measure around 200 track points with a
spatial resolution close to 100 microns.
The Micro-Pattern Gas Detector (MPGD) is a good candidate, which should
provide, with narrow pads, better resolution than the classical
proportional-wire pad readout. Using
narrow pads to improve the resolution could add significantly to the detector
cost and complexity. The MPGD readout concept
of charge dispersion has achieved excellent resolution using 2 mm pad
width in cosmic ray tests at Carleton in the absence of a magnetic field. New 4 GeV/c pion beam tests have been
performed at KEK in Japan with several gas mixtures using the Micromegas and
the GEM for the readout. Data were
recorded with and without a magnetic field.
At 1 T the best spatial resolution obtained is close to
50 microns for short drift distances, which is a very encouraging result.
* This work is being supported
by NSERC
* This work is being supported
by NSERC