GRAPE - The Gamma Ray Polarimeter Experiment

Details GRAPE - The Gamma Ray Polarimeter Experiment GRAPE - The Gamma Ray Polarimeter Experiment

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21347505m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #475.05; Bulletin of the American Astronomical Society, Vol. 41, p.435

Astronomy and Astrophysics

Astronomy

Scientific paper

We have developed a design for a hard X-ray polarimeter operating in the energy range from 50 to 500 keV. This modular design, known as GRAPE (Gamma-Ray Polarimeter Experiment), has been successfully demonstrated in the lab using partially polarized gamma-ray sources and using fully polarized photon beams at Argonne National Laboratory. In June of 2007, a GRAPE engineering model was flown on a high altitude balloon flight to demonstrate the design and to collect background data. We are currently working on the development of a much larger balloon payload that would provide a significant level of sensitivity for gamma-ray bursts on a long-duration balloon flight and, if flown near solar max, would also provide significant sensitivity for solar flare polarization measurements. We shall review the history, status and future potential of the GRAPE project and summarize the potential for making polarization measurements of gamma-ray bursts and solar flares.

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