Search

Your search keyword '"Komura S"' showing total 25 results
Start Over Author "Komura S" Publisher iop publishing
25 results on '"Komura S"'

1. Development of a μ-PIC with glass substrate aiming at high gas gain

Author

Abe, M, primary, Tanimori, T, additional, Takada, A, additional, Mizumura, Y, additional, Komura, S, additional, Kishimoto, T, additional, Takemura, T, additional, Yoshikawa, K, additional, Nakamura, Y, additional, Nakamasu, Y, additional, Taniguchi, T, additional, Onozaka, K, additional, Saito, K, additional, Mizumoto, T, additional, Sonoda, S, additional, Parker, J D, additional, Miuchi, K, additional, and Sawano, T, additional

Published
2020
Full Text
View/download PDF

2. AN ELECTRON-TRACKING Compton TELESCOPE for A SURVEY of the DEEP UNIVERSE by MeV GAMMA-RAYS

Author

Tanimori, T., Kubo, H., Takada, A., Iwaki, S., Komura, S., Kurosawa, S., Matsuoka, Y., Miuchi, K., Miyamoto, S., Mizumoto, T., Mizumura, Y., Nakamura, K., Nakamura, S., Oda, M., Parker, J. D., Sawano, T., Sonoda, S., Takemura, T., Tomono, D., Ueno, K., Tanimori, T., Kubo, H., Takada, A., Iwaki, S., Komura, S., Kurosawa, S., Matsuoka, Y., Miuchi, K., Miyamoto, S., Mizumoto, T., Mizumura, Y., Nakamura, K., Nakamura, S., Oda, M., Parker, J. D., Sawano, T., Sonoda, S., Takemura, T., Tomono, D., and Ueno, K.

Abstract

Photon imaging for MeV gammas has serious difficulties due to huge backgrounds and unclearness in images, which originate from incompleteness in determining the physical parameters of Compton scattering in detection, e.g., lack of the directional information of the recoil electrons. The recent major mission/instrument in the MeV band, Compton Gamma Ray Observatory/COMPTEL, which was Compton Camera (CC), detected a mere ∼30 persistent sources. It is in stark contrast with the ∼2000 sources in the GeV band. Here we report the performance of an Electron-Tracking Compton Camera (ETCC), and prove that it has a good potential to break through this stagnation in MeV gamma-ray astronomy. The ETCC provides all the parameters of Compton-scattering by measuring 3D recoil electron tracks; then the Scatter Plane Deviation (SPD) lost in CCs is recovered. The energy loss rate (dE/dx), which CCs cannot measure, is also obtained, and is found to be helpful to reduce the background under conditions similar to those in space. Accordingly, the significance in gamma detection is improved severalfold. On the other hand, SPD is essential to determine the point-spread function (PSF) quantitatively. The SPD resolution is improved close to the theoretical limit for multiple scattering of recoil electrons. With such a well-determined PSF, we demonstrate for the first time that it is possible to provide reliable sensitivity in Compton imaging without utilizing an optimization algorithm. As such, this study highlights the fundamental weak-points of CCs. In contrast we demonstrate the possibility of ETCC reaching the sensitivity below 1 × 10(-12) erg cm(-2) s(-1) at 1 MeV.

Published
2015

3. A performance study of an electron-tracking Compton camera with a compact system for environmental gamma-ray observation

Author

Mizumoto, T., primary, Tomono, D., additional, Takada, A., additional, Tanimori, T., additional, Komura, S., additional, Kubo, H., additional, Matsuoka, Y., additional, Mizumura, Y., additional, Nakamura, K., additional, Nakamura, S., additional, Oda, M., additional, Parker, J.D., additional, Sawano, T., additional, Bando, N., additional, and Nabetani, A., additional

Published
2015
Full Text
View/download PDF

4. Performance of a new Electron-Tracking Compton Camera under intense radiations from a water target irradiated with a proton beam

Author

Matsuoka, Y., primary, Tanimori, T., additional, Kubo, H., additional, Takada, A., additional, Parker, J.D., additional, Mizumoto, T., additional, Mizumura, Y., additional, Iwaki, S., additional, Sawano, T., additional, Komura, S., additional, Kishimoto, T., additional, Oda, M., additional, Takemura, T., additional, Miyamoto, S., additional, Sonoda, S., additional, Tomono, D., additional, Miuchi, K., additional, Kabuki, S., additional, and Kurosawa, S., additional

Published
2015
Full Text
View/download PDF

5. Development of a 30 cm-cube Electron-Tracking Compton Camera for the SMILE-II Experiment

Author

Mizumura, Y, primary, Tanimori, T, additional, Kubo, H, additional, Takada, A, additional, Parker, J D, additional, Mizumoto, T, additional, Sonoda, S, additional, Tomono, D, additional, Sawano, T, additional, Nakamura, K, additional, Matsuoka, Y, additional, Komura, S, additional, Nakamura, S, additional, Oda, M, additional, Miuchi, K, additional, Kabuki, S, additional, Kishimoto, Y, additional, Kurosawa, S, additional, and Iwaki, S, additional

Published
2014
Full Text
View/download PDF

6. NEWAGE

Author

Nakamura, K, primary, Miuchi, K, additional, Tanimori, T, additional, Kubo, H, additional, Mizumoto, T, additional, Parker, J D, additional, Takada, A, additional, Nishimura, H, additional, Sekiya, H, additional, Takeda, A, additional, Sawano, T, additional, Matsuoka, Y, additional, Komura, S, additional, Yamaguchi, Y, additional, and Nakaura, S, additional

Published
2013
Full Text
View/download PDF

7. Simulation of gas avalanche in a micro pixel chamber using Garfield++

Author

Takada, A, primary, Tanimori, T, additional, Kubo, H, additional, Parker, J D, additional, Mizumoto, T, additional, Mizumura, Y, additional, Iwaki, S, additional, Sawano, T, additional, Nakamura, K, additional, Taniue, K, additional, Higashi, N, additional, Matsuoka, Y, additional, Komura, S, additional, Sato, Y, additional, Namamura, S, additional, Oda, M, additional, Sonoda, S, additional, Tomono, D, additional, Miuchi, K, additional, Kabuki, S, additional, Kishimoto, Y, additional, and Kurosawa, S, additional

Published
2013
Full Text
View/download PDF

9. Development of the balloon-borne sub-MeV gamma-ray Compton camera using an electron-tracking gaseous TPC and a scintillation camera

Author

Ueno, K, primary, Mizumoto, T, additional, Hattori, K, additional, Higashi, N, additional, Iwaki, S, additional, Kabuki, S, additional, Kishimoto, Y, additional, Komura, S, additional, Kubo, H, additional, Kurosawa, S, additional, Matsuoka, Y, additional, Miuchi, K, additional, Nakamura, K, additional, Nishimura, H, additional, Parker, J, additional, Sato, Y, additional, Sawano, T, additional, Takada, A, additional, and Tanimori, T, additional

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results