Vikas Joshi

Vikas Joshi ( India )

vikasphysics78 @

Multi-TeV observations of the Galactic Plane

The High Altitude Water Cherenkov (HAWC) high-energy gamma ray observatory is situated on the flanks of Sierra Negra (Mexico) at an altitude 4100 m. It consists of 300 Water Cherenkov Detectors (WCDs) in the main array with a total surface area of 22000 m^2. It detects gamma rays in the energy range of 0.1-100 TeV, with a FoV of two steradians. HAWC lacks of a good shower reconstruction when the core of the shower lies outside the main array.  To improve its performance, an outrigger array will be constructed, which will improve the reconstruction of showers (and hence the gamma-ray source sensitivity) above multi-TeV energies. It will consist of ~300 outriggers tanks surrounding the main HAWC array. 

The purpose of my thesis is twofold: first, to provide the simulation input for the design of the outrigger array and develop analysis methods to integrate the outrigger array into HAWC. Second, using the improved performance of the outrigger array at multi-TeV energies, search for PeV particle accelerators within our own galaxy. Follow-up observations using imaging Cherenkov telescope arrays H.E.S.S. and/or CTA will be made of the PeVatron candidates found in this search.

Supervisor:   Jim Hinton  ( MPIK )

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