Researcher Database

（Last updated : 2024-06-22 15:38:54）　

OKA TOMOHIKO

Department / Course Research Organization of Science and Technology

Title / Position Senior Researcher

Academic background
1.	2020/04～2023/03	Doctorial Course │ Department for Physics │ Graduate School, Division of Natural Science │ Kyoto University │ Completed Doctor of Science (Hunting for PeV proton accelerators in Galactic supernova remnants by γ-ray observations)
2.	2018/04～2020/03	Master Course │ Department for Physics │ Graduate School, Division of Natural Science │ Kyoto University │ Completed

Business career
1.	2023/10 ～	Senior Researcher │ Research Organization of Science and Technology │ Ritsumeikan University
2.	2023/04 ～ 2023/09	Project researcher │ Research Organization of Science and Technology │ Ritsumeikan University

Research activities
1.	2018/12 ～	The Physical Society of Japan.
2.	2019/05 ～	The Astronomical Society of Japan.

Subject of research
1.	Search for the origin of cosmic rays by gamma-ray observations

Research summary
MeV gamma ray observations using the electron-track Compton Camera to discover the origin of cosmic rays Many mysteries remain in the evolution of the universe and the formation of stars and galaxies. The origin of Cosmic Rays (CRs), which are the key to these mysteries, is, however, still unclear. If CR origin exists in our Galaxy, CRs emit nuclear gamma-ray lines with the energy of several Mega electron volts (MeV), and thus, we can elucidate the CR origin by searching such emissions. However, current MeV gamma-ray detectors cannot achieve sufficient performance to find this radiation. In this research, our team develops a next-generation MeV gamma-ray detector, an “electron-tracking Compton Camera,” that has the best spatial resolution and sufficient sensitivity and then conducts balloon experiments toward observing the gamma-ray sky.

Present specialized field
Keyword：Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics

Papers
1.	2024/06	High-energy extension of the gamma-ray band observable with an electron-tracking Compton camera │ Nuclear Instruments and Methods in Physics Research Section A │ 1063 (169242) (Co-authored)

E-Mail Address

Department laboratory expense researcher number
10992414

External Researcher ID
ORCID ID
0000-0002-9924-9978