Resolution studies of a GEM-based TPC
type: CreativeWork
description: The next large collider to be build after the Large Hadron Collider LHC is the electron-positron International Linear Collider ILC. Both collider concepts complement each other. The LHC, reaching centre of mass energies of up to 14 TeV, has a high discovery potential, while the ILC with its well known initial state allows high precision measurements. A detector at the ILC will need a finely segmented calorimeter and a tracking detector with high efficiency and momentum resolution, as well as good particle identification. Currently there are four different concept studies trying to optimise the detector for the requirements at the ILC. In three of these detector concepts a time projection chamber (TPC) is foreseen as the main tracking device. A TPC allows the measurement of several hundred points per track, providing a very good tracking efficiency. With only 3% of a radiation length in the barrel region, the amount of material introduced into the detector is small compared to silicon sensors. This minimises multiple scattering and improves the energy measurement in the calorimeters. The TPC also provides a good measurement of the specific energy loss dE/dx for particle identification. To achieve the intended spatial resolution of 100 micrometres, micro pattern gas detectors (MPGD) are considered for gas amplification. These devices consist of structures with a size of a few hundred micrometres, in contrary to an anode wire readout with a pitch of typically a few millimetres. This improves the granularity of the measurement and minimises ExB effects, resulting in an enhanced spatial and two track resolution. Furthermore the backdrift of ions into the sensitive volume of the TPC is intrinsically suppressed. This is essential, as the established method of gating away the ions after each recorded event will not work at the ILC. Due to the bunch structure there will be data from 150 bunch crossings simultaneously in the TPC. The two different MPGDs discussed for the ILC …
abstract: The next large collider to be build after the Large Hadron Collider LHC is the electron-positron International Linear Collider ILC. Both collider concepts complement each other. The LHC, reaching centre of mass energies of up to 14 TeV, has a high discovery potential, while the ILC with its well known initial state allows high precision measurements. A detector at the ILC will need a finely segmented calorimeter and a tracking detector with high efficiency and momentum resolution, as well as good particle identification. Currently there are four different concept studies trying to optimise the detector for the requirements at the ILC. In three of these detector concepts a time projection chamber (TPC) is foreseen as the main tracking device. A TPC allows the measurement of several hundred points per track, providing a very good tracking efficiency. With only 3% of a radiation length in the barrel region, the amount of material introduced into the detector is small compared to silicon sensors. This minimises multiple scattering and improves the energy measurement in the calorimeters. The TPC also provides a good measurement of the specific energy loss dE/dx for particle identification. To achieve the intended spatial resolution of 100 micrometres, micro pattern gas detectors (MPGD) are considered for gas amplification. These devices consist of structures with a size of a few hundred micrometres, in contrary to an anode wire readout with a pitch of typically a few millimetres. This improves the granularity of the measurement and minimises ExB effects, resulting in an enhanced spatial and two track resolution. Furthermore the backdrift of ions into the sensitive volume of the TPC is intrinsically suppressed. This is essential, as the established method of gating away the ions after each recorded event will not work at the ILC. Due to the bunch structure there will be data from 150 bunch crossings simultaneously in the TPC. The two different MPGDs discussed for the ILC …
author: Killenberg, Martin
language: eng
keywords: info:eu-repo/classification/ddc/530, Physik, Zeitprojektionskammer, GEM, ILC, Prototyp, Homogenität, Ortsauflösung, Gas Electron Multiplier, TPC, time projection chamber, prototype, hodoscope, magnetic field, spatial resolution, homogeneity
date published: 2006
date modified: 2026-07-30T19:43:10Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University