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Radiodetection

The goal of the GIGAS proposal is to demonstrate the possibility to measure the evolution of the electromagnetic cascade with 100% duty cycle for all extensive air showers with energies above 1 J. To do so, we will measure the microwave emission produced by the electrons and positrons of the cascade, connecting microwave sensors to each Auger surface detector. Such a measurement will provide a calorimetric energy estimate and an excellent identification of the primary particle on an event-by-event basis. Individual identification of UHECR primaries is in itself a major progress since primary separation is today only possible on a statistical basis.

Our approach is both innovative and conservative. It exploits the microwave signal of extensive air showers conjugated with the detection and reconstruction capabilities of a “traditional” array. We are the only groups in the world working on this symbiotic approach, a pre-prototype of 61 sensors deployed on the Auger array to test our integration method observed for the first time in the world the 3.4 to 4.2 GHz signal from an extensive air showers.


 

IPN

Institut de Physique Nucléaire Orsay - 15 rue Georges CLEMENCEAU - 91406 ORSAY (FRANCE)
UMR 8608 - CNRS/IN2P3

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