Atsushi Mase
Kyushu University
268 Papers
1.9K Citations
Atsushi Mase is an academic researcher from Kyushu University. The author has contributed to research in topics: Plasma diagnostics & Reflectometry. The author has an hindex of 26, co-authored 265 publications. Previous affiliations of Atsushi Mase include Japan Atomic Energy Research Institute & Graduate University for Advanced Studies.
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Papers
Development of microwave diagnostic simulator
H. Hojo,Y. Kurosawa,Atsushi Mase +2 more
Abstract: Two-dimensional simulator models are presented for microwave diagnostics. The models assume the Maxwell wave equation coupled with the equation of plasma current density in a cold magnetized plasma, which can describe propagation, reflection, and cross polarization scattering of the ordinary and extraordinary modes. The effects of waveguide for the microwave launcher and wall boundary of the vacuum vessel are included in the models. The simulations of ultrashort-pulse reflectometry with the use of incident subcyclic ordinary modes in the models are performed to test the problem of density profile reconstruction.
Analytical study of ultra-short pulse reflectometry
TL;DR: In this paper, the results of an analytical treatment of the time-dependent 2D full-wave equation are presented for the case of ultra-short pulse (USP) reflectometry.
19
Patent
Biological vibration frequency detector and vehicle
Atsushi Mase,Keisuke Nishiyama,Tetsuro Shirakata,Naonori Tateishi,Takashi Yoshida,傑 吉田,哲朗 白形,尚之 立石,恵介 西山,淳 間瀬 +9 more
- 30 Aug 2007
TL;DR: In this article, a heart rate detector is provided with a plurality of microwave transmitter-receivers 20 for irradiating a subject 16 with microwaves 12 and receiving the reflected waves 14, and a CPU 50 for executing correlation processing using heart rate signals Shr based on the plurality of reflected wave 14 and detecting the heart rate [times/minute] of the subject 16 using the processing result.
19
Development of millimeter-wave two-dimensional imaging array
Naoyuki Oyama,Atsushi Mase,H. Negishi,T. Tokuzawa,Akiyosi Itakura,Teruo Tamano,K. Yatsu,K. Watabe,Koji Mizuno,Y. Nagayama,Kazuo Kawahata,H. Matsuura,K. Uchida,A. Miura +13 more
TL;DR: In this article, a millimeter-wave two-dimensional imaging array has been developed for diagnostics of magnetically confined plasmas, which is applied to the plug cell of the GAMMA 10 tandem mirror, and measures time evolution of radial and axial line-density and electron cyclotron emission (ECE) profiles in one plasma shot.
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Beaming of Millimeter Waves from Plasma Photonic Crystal Waveguides
TL;DR: In this article, the beaming of millimeter waves from two-dimensional plasma photonic crystal waveguides is studied numerically based on a finite difference time domain simulation, and it is shown that the coupling with surface lattice modulation is due to the horn antenna of plasma rods having a plasma-rod lattice in a vacuum.