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X-Ray Polarimetry Workshop SLAC, Stanford, California 9-11 February 2004 |
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Polarimetric sensitivity and performance of a germanium strip detector
Richard
Kroeger
Naval Research Laboratory
kroeger@nrl.navy.mil
Richard Kroeger, Naval Research Laboratory
The germanium strip detector provides high sensitivity to measure gamma-ray polarization of arbitrary direction and magnitude. Key to the performance are energy resolution, ability to cleanly detect and locate multiple interactions, and the full detector volume is used to detect both the primary Compton scattering, and any secondary interactions. The germanium strip detector has been shown to provide sensitivity approaching the theoretical limits for Compton polarimetry. The principle is to capitalize on the angular dependence of the Compton scattering cross section to polarized gamma rays and measure the distribution of scatter directions within the detector. Performance measurements of a germanium strip are presented, along with efficiency and sensitivity calculations. The sensitivity of an astrophysics polarization mission designed to measure polarization in the 70-500 keV energy range is also presented.
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For more information, contact
Jennifer Formichelli |
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