Underground water Cherenkov muon detector array with the Tibet air shower array for gamma-ray astronomy in the 100 TeV region


Abstract:

We propose to build a large water-Cherenkov-type muon-detector array (Tibet MD array) around the 37∈000 m<sup>2</sup> Tibet air shower array (Tibet AS array) already constructed at 4300 m above sea level in Tibet, China. Each muon detector is a waterproof concrete pool, 6 m wide × 6 m long × 1.5 m deep in size, equipped with a 20 inch-in-diameter PMT. The Tibet MD array consists of 240 muon detectors set up 2.5 m underground. Its total effective area will be 8640 m<sup>2</sup> for muon detection. The Tibet MD array will significantly improve gamma-ray sensitivity of the Tibet AS array in the 100 TeV region (10-1000 TeV) by means of gamma/hadron separation based on counting the number of muons accompanying an air shower. The Tibet AS+MD array will have the sensitivity to gamma rays in the 100 TeV region by an order of magnitude better than any other previous existing detectors in the world. © Springer Science+Business Media B.V. 2007.

Año de publicación:

2007

Keywords:

  • Cosmic ray
  • Gamma ray
  • Muon
  • SNR

Fuente:

scopusscopus