Author/Authors :
Aprile، نويسنده , , E. and Curioni، نويسنده , , A. and Egorov، نويسنده , , V. and Giboni، نويسنده , , K.L. and Oberlack، نويسنده , , Hanno U. and Ventura، نويسنده , , S. and Doke، نويسنده , , T. and Takizawa، نويسنده , , K. and Chupp، نويسنده , , E.L. and Dunphy، نويسنده , , P.P.، نويسنده ,
Abstract :
A liquid xenon time projection chamber (LXeTPC) has been developed to image cosmic γ-rays in the energy band 0.2–20 MeV. Its performance as Gamma Ray Imaging Telescope (LXeGRIT instrument) has been tested during a high altitude balloon flight (Spring ’99, New Mexico). The detector, with 400 cm2 area and 7 cm drift gap, is filled with 7 l high purity LXe. Both ionization and scintillation light signals are detected to measure the energy deposits and the three spatial coordinates of individual γ-ray interactions within the sensitive volume. During the pre-flight calibration experiments the LXeGRIT instrument was extensively tested with γ-ray sources in the laboratory: a 10% FWHM energy resolution at 1 MeV was determined, scaling with 1/E. The detector shows a linear response in the energy range 511 keV–4.4 MeV.
