Homepage of Yusaku KATAYOSE
High energy particles and gamma ray come from outer space is called "cosmic ray". Since cosmic rays have various information of the universe, we can study astrophysical phenomena by observing cosmic rays. My laboratory participates in the international cosmic-ray observation experiment and is researching cosmic rays. We are developing radiation detectors and electronics and I also conduct research by Monte Carlo simulation.

Resarch

o Tibet ASgamma project

Mesurement of cosmic ray composition
　　We installed an air shower detector and an air shower core detector in Tibet (4300 m) to measure the cosmic ray chemical composition of "Knee region". We already have revealed all particle spectra, protons and helium spectra in this observation In order to measure the spectrum of heavier nuclei, we are developing a new detector YAC (Yangbajing Air shower Core).

oCALET(CALorimetric Electron Telescope) project

　

o Development of radiation detector and electronics 　　

Wide Dynamic range charge amplifier(WDAMP) ASIC

We developed a front end ASIC with a wide measurement range (0.1 fC to several tens of pC) for radiation detectors in cooperation with KEK and JAXA.

o Research on cosmic ray acceleration mechanism by solar neutron observation

o BETS(Balloon-borne Electron Telescope with Scintillating fibers),Polar Patrol Balloon (PPB) experiment

Topics

published paper (Jan. 2011)

"Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects", Advances in Space Research, 47,629-639, 2011
M. Amenomori, Y.Katayose, M.Shibata et al, Abstract

published paper "CHEMICAL COMPOSITION AND MAXIMUM ENERGY OF GALACTIC COSMIC RAYS",
The Astrophysical Journal 716 (2010) 1076-1083
M.Shibata, Y.Katayose, J.Huang, D.Chen, Abstract

published paper（2008）

"The All-Particle Spectrum of Primary Cosmic Rays in the Wide Energy Range from 10^14 to 10^17 eV Observed with the Tibet-III Air-Shower Array" The Astrophysical Journalpp. vol. 678, pp1165-1179 (2008).