The event trigger system for CALET

Yoshitaka Ueyama*, Shoji Torii, Katsuaki Kasahara, Hiroyuki Murakami, Shunsuke Ozawa, Yosui Akaike, Tae Niita, Masanori Nakamura, Keisuke Yoshida, Tadahisa Tamura, Shoji Okuno, Yusaku Katayose, Yuki Shimizu


研究成果: Conference contribution


The CALorimetric Electron Telescope, CALET, is a mission to study high energy phenomena in the universe by observing high energy cosmic rays (electrons, gamma rays, and nuclei) on the International Space Station. The instrument consists of a segmented plastic scintillator charge-measuring module, an imaging calorimeter consisting of 8 scintillating fiber planes interleaved with tungsten plates of 3 radiation length, and a total absorption calorimeter consisting of orthogonal PWO logs of 27 radiation length. It is necessary to eliminate the background events, mostly low energy protons that prevent efficient observation of high energy cosmic rays. Therefore, CALET has an on-board trigger system to select events which are 1) high energy showers, 2) low energy showers and 3) non-interacting protons or heavy nuclei. These triggers are generated by a combination of the signals from the charge detector, the imaging calorimeter, and the top layer of PWO in the total absorption calorimeter. A CERN-SPS beam test of the CALET prototype detector was carried out by using muons, electrons, and hadrons. We introduce the CALET trigger system and present its performance verified during the beam test.

ホスト出版物のタイトルProceedings of the 32nd International Cosmic Ray Conference, ICRC 2011
出版社Institute of High Energy Physics
出版ステータスPublished - 2011
イベント32nd International Cosmic Ray Conference, ICRC 2011 - Beijing
継続期間: 2011 8月 112011 8月 18


Other32nd International Cosmic Ray Conference, ICRC 2011

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学


「The event trigger system for CALET」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。