LXeGRIT Compton telescope prototype: current status and future prospects

Elena Aprile; Alessandro Curioni; Karl-Ludwig Giboni; Masanori Kobayashi; Uwe G. Oberlack; Edward L. Chupp; Philip P. Dunphy; Tadayoshi Doke; Jun Kikuchi; Sandro Ventura

doi:10.1117/12.461567

11 March 2003 LXeGRIT Compton telescope prototype: current status and future prospects

Elena Aprile, Alessandro Curioni, Karl-Ludwig Giboni, Masanori Kobayashi, Uwe G. Oberlack, Edward L. Chupp, Philip P. Dunphy, Tadayoshi Doke, Jun Kikuchi, Sandro Ventura

Author Affiliations +

Proceedings Volume 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy; (2003) https://doi.org/10.1117/12.461567
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

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.

Citation Download Citation

Elena Aprile, Alessandro Curioni, Karl-Ludwig Giboni, Masanori Kobayashi, Uwe G. Oberlack, Edward L. Chupp, Philip P. Dunphy, Tadayoshi Doke, Jun Kikuchi, and 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); https://doi.org/10.1117/12.461567

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