Gamma-ray Polarimetry

An astrophysics application of a low noise Double-sided Silicon Strip Detector (DSSD) is described. A Semiconductor Multiple-Compton Telescope (SMCT) is being developed to explore the gamma-ray universe in the 0.1-20 MeV energy band. Excellent energy resolution and polarization sensitivity are key features of the SMCT. We have developed prototype modules for a low noise DSSD system, which reached an energy resolution of 1.3 keV (FWHM) for 122 keV at 0 degree C. Results of a gamma-ray imaging test are also presented.Comment: 6 pages, 9 figures. Contributed to International Workshop on Vertex Detectors, Kailua-Kona, Hawaii USA, November 3-8, 200

GLAST Tracker

The Large Area Telescope (LAT) on board the Gamma-ray Large-Area Space Telescope (GLAST) is a pair-conversion gamma-ray detector designed to explore the gamma-ray universe in the 20 MeV-300 GeV energy band. The Tracker subsystem of the LAT will perform tracking of electron and positrons to determine the origin of the gamma-ray. The design and performance of the GLAST LAT Tracker are described in this paper.Comment: 5 pages, 5 figues, Invited talk at Vertex 2005, Chuzenji Lake, Nikko, Japan, November 7-November 11, 2005, To be published in Nuclear Instruments and Methods