Speaker
Prof.
Toru Tanimori
(Dept. of Physics, Kyoto University)
Description
High energy gamma-ray astronomy has become a very promising field. On the other hand, in MeV region, there still remain many unobserved interesting celestial objects such as black holes and Gamma-ray Bursts. To explore this energy range, we have developed Electron Tracking Compton Camera (ETCC) consisting of a gaseous Time projection Chamber (TPC) based on the micro pixel gas counter (-PIC) and fine Scintillator pixel array. By measuring the 3D-track of a recoil electron in TPC, ETCC can measure the direction of incident gamma-rays photon by photon with a 3str wide field of view, and provides both a good background rejection and an angular resolution of ~1degree at 1MeV (FWHM). ETCC with a 1x1x0.5m size will be a good candidate for wide band measurement on 0.1-100MeV gamma rays by single detector. Our final goal is the all-sly survey with several ten times better sensitivities of COMPTEL between 100keV to 100MeV using above large ETCC in space. We already carried out the observation of celestial sub-MeV gamma rays using with a small ETCC with a balloon (Sub-MeV gamma ray Imaging Loaded-on-balloon Experiment: SMILE-I) in 2006, and successfully obtained diffuse cosmic and atmosphere gamma rays. Now we are constructing a medium ETCC with a 30 cm cubic for the next balloon experiment to catch gamma-rays from the Crab, GRB and terrestrial gamma-ray burst occurred in the North Pole (SMILE-II). Terrestrial gamma-ray bursts are generated by relativistic electron precipitation accelerated along the terrestrial magnetic field. Long duration flight (2weeks) around the North Pole is planned in 2013 using this SMILE-II.
Here I will mention about the design concept and performance of the ETCC using SMILE-II. Also results on the measurement of the angular resolution for the pair creation mode in 10-20MeV region using the ETCC is presented
Author
Prof.
Toru Tanimori
(Dept. of Physics, Kyoto University)
Co-authors
Dr
Atsushi Takada
(Research Institute for Sustainable Humanosphere, Kyoto University)
Dr
Hidetoshi Kubo
(Dept. of Physics, Kyoto University)
Dr
Joseph Parker
(Dept. of Physics, Kyoto University)
Dr
Kazuki Ueno
(Dept. of Physics, Kyoto University)
Dr
Kentaro Miuchi
(Dept. of Physics, Kyoto University)
Mr
Kiseki Nakamura
(Dept. of Physics, Kyoto University)
Mr
Kojiro Taniue
(Dept. of Physics, Kyoto University)
Mr
Masashiro Aono
(Dept. of Physics, Kyoto University)
Mr
Satoru Iwaki
(Dept. of Physics, Kyoto University)
Dr
Shigeto Kabuki
(Dept. of Physics, Kyoto University)
Shunsuke Kurosaw
(Dept. of Physics, Kyoto University)
Mr
Tatsuya Sawano
(Dept. of Physics, Kyoto University)
Mr
Yoshihiro Matsuoka
(Dept. of Physics, Kyoto University)
Dr
Yuji Kishimoto
(Dept. of Physics, Kyoto University)
