11 March 2003 LXeGRIT Compton telescope prototype: current status and future prospects
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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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Elena Aprile, Elena Aprile, Alessandro Curioni, Alessandro Curioni, Karl-Ludwig Giboni, Karl-Ludwig Giboni, Masanori Kobayashi, Masanori Kobayashi, Uwe G. Oberlack, Uwe G. Oberlack, Edward L. Chupp, Edward L. Chupp, Philip P. Dunphy, Philip P. Dunphy, Tadayoshi Doke, Tadayoshi Doke, Jun Kikuchi, Jun Kikuchi, Sandro Ventura, Sandro Ventura, } "LXeGRIT Compton telescope prototype: current status and future prospects", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461567; https://doi.org/10.1117/12.461567
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