The General Antiparticle Spectrometer (GAPS) as a New Approach to Search Dark Matter

Details The General Antiparticle Spectrometer (GAPS) as a New Approach to Search Dark Matter The General Antiparticle Spectrometer (GAPS) as a New Approach to Search Dark Matter

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924811l&link_type=abstract

American Astronomical Society, AAS Meeting #219, #248.11

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The General Antiparticle Spectrometer is being designed to detect low-energy cosmic-ray antideuterons, which are believed to be the byproduct of the annihilation of neutralinos, the possible main component of cold dark matter. The antiparticle is expected to be stopped by solid Si(Li) trackers to form an exotic atom which will cascade down to ground level producing well-defined x-rays and annihilate into a signature pion star. The GAPS is expected to be launched from Antarctica in 2015 on a long duration flight at high altitude. A GAPS prototype (pGAPS) is now being integrated with a detector of six Si(Li) modules in three planes, and a cooling system to keep the modules at -35 degree Celsius in order to achieve a resolution of 3 keV for 60 keV x-ray. ISAS Li batteries will feed electrical power to the various parts of the pGAPS system. The preamp-Si(Li) tracker system is now being tested and work is being done to reach the desired resolution. The pGAPS will be launched prior to the final flight at stratospheric altitude to test the performance of the spectrometer.
This research project was done in the Space Science laboratory at the University of California, Berkeley with SROP (Summer Research Opportunity Program) funding.

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