出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The physics goals and the expected enviroment at the ILC requires the development of a detector
with unprecedented tracking capabilities. A high resolution TPC with gas amplification based
on micro pattern gas detectors is a promising candidate for the main tracker at the ILC detector.
Significant progress has been achieved on the development of a TPC concept with Gas Electron
Multipliers (GEM) used for gas amplification. Significant ion-backdrift reduction was obtained
using special settings of the GEM structures. The influence of the space charge, produced by the
remaining ions, on the track reconstruction has been investigated. To further study the spatial resolution
of a GEM-based TPC, prototypes with low-mass field cages were constructed. They were
operated within a high-resolution silicon hodoscope, in high magnetic fields and in test beams.
Here, emphasis is placed on the spatial resolution, which can be achieved with diminished pad
sizes or varied pad geometries. Additionally, extensive effort is spent on the development of an
accurate numerical simulation of the TPC porperties, such as drift, diffusion and gas amplification.
