29 July 2010 Plans for the first balloon flight of the gamma-ray polarimeter experiment (GRAPE)
Author Affiliations +
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, consisting of a single detector module, was flown on a high altitude balloon flight to further demonstrate the design and to collect background data. We are currently preparing a much larger balloon payload for a flight in the fall of 2011. Using a large (16-element) array of detector modules, this payload is being designed to search for polarization from known point sources of radiation, namely the Crab and Cygnus X-1. This first flight will not only provide a scientific demonstration of the GRAPE design (by measuring polarization from the Crab nebula), it will also lay the foundation for subsequent long duration balloon flights that will be designed for studying polarization from gamma-ray bursts and solar flares. Here we shall present data from calibration of the first flight module detectors, review the latest payload design and update the predicted polarization sensitivity for both the initial continental US balloon flight and the subsequent long-duration balloon flights.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Taylor P. Connor, Taylor P. Connor, Christopher M. Bancroft, Christopher M. Bancroft, Peter F. Bloser, Peter F. Bloser, Jason S. Legere, Jason S. Legere, Mark L. McConnell, Mark L. McConnell, James M. Ryan, James M. Ryan, } "Plans for the first balloon flight of the gamma-ray polarimeter experiment (GRAPE)", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77324E (29 July 2010); doi: 10.1117/12.857467; https://doi.org/10.1117/12.857467


Current status of the GRAPE balloon program
Proceedings of SPIE (July 24 2014)
GRAPE: a balloon-borne gamma-ray polarimeter
Proceedings of SPIE (August 20 2009)
Recent laboratory tests of a hard x ray solar flare...
Proceedings of SPIE (November 24 1999)
Dedicated polarimeter design for hard x ray and soft gamma...
Proceedings of SPIE (February 02 2004)
Hard x ray polarimeter for gamma ray bursts and solar...
Proceedings of SPIE (March 10 2003)

Back to Top