A liquid xenon time projection chamber for gamma-ray imaging in astrophysics: present status and future directions

Citation
E. Aprile et al., A liquid xenon time projection chamber for gamma-ray imaging in astrophysics: present status and future directions, NUCL INST A, 461(1-3), 2001, pp. 256-261
Citations number
3
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
461
Issue
1-3
Year of publication
2001
Pages
256 - 261
Database
ISI
SICI code
0168-9002(20010401)461:1-3<256:ALXTPC>2.0.ZU;2-8
Abstract
A liquid xenon time projection chamber (LXeTPC) has been developed to image cosmic gamma -rays in the energy band 0.2-20 MeV. Its performance as Gamma Ray Imaging Telescope (LXeGRIT instrument) has been tested during a high a ltitude balloon flight (Spring '99, New Mexico). The detector, with 400 cm( 2) area and 7 cm drift gap, is filled with 7 l high purity LXe. Both ioniza tion and scintillation light signals are detected to measure the energy dep osits and the three spatial coordinates of individual gamma -ray interactio ns within the sensitive volume. During the. pre-flight calibration experime nts the LXeGRIT instrument was extensively tested with gamma -ray sources i n the laboratory: a 10% FWHM energy resolution at 1 MeV was determined, sca ling with 1/rootE. The detector shows a linear response in the energy range 511 keV-4.4 MeV. (C) 2001 Elsevier Science B.V. All rights reserved.