Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1823260 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2013 | 6 Pages |
Abstract
A combination of a pixel chip and a gas chamber opens new opportunities for particle detectors. These “GasPix” detectors have vector tracking features offering at the same time a L1 track trigger and a particle identification using transition radiation and dE/dX measurements. Test-beam and MC studies of tracking and particle identification properties have been performed with a GasPix prototype. The properties of the detector very much depend on the gas mixture. For one layer of the GasPix detector one can obtain a spatial accuracy down to 11μm and a vector angular accuracy of about 10 mrad for a beam incident angle of 10°. For particle identification studies the detector was filled with a Xe/CO2 (70/30) mixture. A block of transition radiation radiator of 19 cm was installed in front of the detector. The pion rejection power using both cluster counting and full dE/dX methods was studied. It was shown that for 5 GeV particles a single layer of the detector gives a pion suppression by about a factor of 7at an electron efficiency of 90%. Two layers of this detector provide a pion rejection factor of 50 at 90% electron efficiency. A comparison of the data and MC results is presented.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
F. Hartjes, N. Hessey, M. Fransen, S. Konovalov, W. Koppert, S. Morozov, A. Romaniouk, V. Tikhomirov, H. Van der Graaf,