Department of Physics, Aoyama Gakuin University
Faculty of Engineering, Aomori University
Physical Department of Moscow State University
Department of Physics, Aoyama Gakuin University
Faculty of Physics and Technology, Hirosaki University
Shonan Institute of Technology
Department of Physics, Aoyama Gakuin University
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
Faculty of Physics and Technology, Hirosaki University
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
School of Medicine, Hirosaki University
P. N. Lebedev Physical Institute of Russian Academy of Sciences
Institute for Nuclear Researches of Russian Academy of Sciences
Faculty of Physics and Technology, Hirosaki University
Physical Department of Moscow State University
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
Physical Department of Moscow State University
Physical Department of Moscow State University
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
Department of Management, Urawa College
Department of Physics, Aoyama Gakuin University
Shonan Institute of Technology
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
Department of Physics, Aoyama Gakuin University
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
Institute for Nuclear Researches of Russian Academy of Sciences
D. V. Skobeltsyn Institute of Nuclear Physics, Moscow State Universit
We report a new energy determination method using the emulsion calorimeter with diffuser module. The idea of diffuser method is based on the energy estimation for a PeV proton observed by the first RUNJOB(RUssia-Nippon JOint Balloon-program) experiment in 1995 and we have used a new type of emulsion chamber with diffuser module since 1997. The diffuser module was set below calorimeter, and the electromagnetic cascade shower develops in the calorimeter, and spreads geometcally in the diffuser. In general, it is very hard to determine the energy unless we detect the shower maximum, but it might be possible to determine the shower energy with help of the diffuser module. We find the energy resolution is better than σ～0.2 for proton with several tens TeV and for iron with 100TeV if the path length of calorimeter and the diffuser are 6c.u. and 4cm respectively. With the thickness of calorimeter of 9c.u. with 4cm diffuser, we can estimate the energy up to nearly 100TeV for proton with the resolution of better than σ～0.2. In this report, we disscus the energy resolution in the present method based on the simulation calculation of cascade shower in the calorimeter with diffuser module. We show several events observed by RUNJOB experiment in 1997 and alloy the present method for the energy determination.
シャワー拡散層付エマルションチェンバーによるエネルギー決定
SA0200107.pdf
(985.25KB)
