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Proceedings Paper

LXeGRIT Compton telescope prototype: current status and future prospects
Author(s): Elena Aprile; Alessandro Curioni; Karl-Ludwig Giboni; Masanori Kobayashi; Uwe G. Oberlack; Edward L. Chupp; Philip P. Dunphy; Tadayoshi Doke; Jun Kikuchi; Sandro Ventura
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Paper Abstract

LXeGRIT is the first prototype of a novel concept of Compton telescope, based on the complete 3D reconstruction of the sequence of interactions of individual γ-rays in one position sensitive detector. This balloon-borne telescope consists of an unshielded time projection chamber with an active volume of 400 cm2 × 7 cm filled with high purity liquid xenon. Four VUV PMTs detect the fast xenon scintillation light signal, providing the event trigger. 124 wires and 4 anodes detect the ionization signals, providing the event spatial coordinates and total energy. In the period 1999-2001, LXeGRIT has been extensively tested both in the laboratory and at balloon altitude, and its response in the MeV region has been thoroughly characterized. Here we summarize some of the results on pre-flight calibration, even reconstruction techniques, and performance during a 27 hour balloon flight on October 4-5. We further present briefly the on-going efforts directed to improve the performance of this prototype towards the requirements for a base module of a next-generation Compton telescope.

Paper Details

Date Published: 11 March 2003
PDF: 13 pages
Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461567
Show Author Affiliations
Elena Aprile, Columbia Astrophysics Lab. (United States)
Alessandro Curioni, Columbia Astrophysics Lab. (United States)
Karl-Ludwig Giboni, Columbia Astrophysics Lab. (United States)
Masanori Kobayashi, Columbia Astrophysics Lab. (United States)
Uwe G. Oberlack, Rice Univ. (United States)
Edward L. Chupp, Univ. of New Hampshire (United States)
Philip P. Dunphy, Univ. of New Hampshire (United States)
Tadayoshi Doke, Waseda Univ. (Japan)
Jun Kikuchi, Waseda Univ. (Japan)
Sandro Ventura, INFN-CNR (Italy)
Univ. degli Studi di Padova (Italy)

Published in SPIE Proceedings Vol. 4851:
X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy
Joachim E. Truemper; Harvey D. Tananbaum, Editor(s)

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