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Masaki Nishiura / Associate Professor / Division of Transdisciplinary Sciences
Department of Advanced Energy / / Plasma physics and sciences, Plasma diagnostics
http://www.ppl.k.u-tokyo.ac.jp/

Career Summary
1999: Ph.D. from The Graduate University for Advanced Studies
1999: Research Fellow of the Japan Society for the Promotion Science, National Institute for Fusion Science
2001: Special Postdoctoral Researcher, RIKEN
2003-2013: Assistant Professor, National Institute for Fusion Science
2013.4-9: Guest visiting researcher, Max-Planck-Institut für Plasmaphysik(Garching)
2013: Associate Professor, The University of Tokyo
Educational Activities
Graduate School: Basic course on Plasma Physics, course on Plasma and Nuclear Fusion
Research Activities
High temperature plasma production and physics research using the magnetsphere type plasma experimental device (RT-1).

Magnetsphere type plasma experimental device RT-1. The levitating superconducting coil generates the magnetic field for plasma confinement. Millimeter electromagnetic wave produces a high temperature plasma.
Magnetsphere type plasma experimental device RT-1. The levitating superconducting coil generates the magnetic field for plasma confinement. Millimeter electromagnetic wave produces a high temperature plasma.


Produced plasma in RT-1.
Produced plasma in RT-1.


Development and application of collective Thomson scattering (CTS) diagnostic using a millimeter electromagnetic wave
This diagnostic is useful for ion velocity distribution and ion temperature diagnostics in fusion devices. We are currently developing and establishing the reliable CTS diagnostic system.

Development of lost alpha particle diagnostic in burning plasmas
Alpha particle loss diagnostic is required in fusion devices such as ITER, because the losses increase the degradation of fusion output and damage the first wall. We are currently researching ways to use this diagnostic in severe radiation environments.
Literature
1) Masaki Nishiura, Shin Kubo, Kenji Tanaka, Sakuji Kobayashi, Kohta Okada, Hiroshi Kasahara, Shinya Ogasawara, Takashi Shimozuma, Takashi Mutoh, Kazuo Kawahata, Teruo Saito, and Yoshinori Tatematsu, LHD experiment group,“70 GHz range notch filter for microwave plasma diagnostics", Plasma and Fusion Research, 8, 2402027 (2013).
2) M. Nishiura, T. Nagasaka, K. Fujioka, Y. Fujimoto, T. Tanaka, T. Ido, S. Yamaomoto, S. Kashiwa, and M. Sasao, LHD experiment group, "Development and irradiation test of lost alpha detection system for ITER", Review of Scientific Instruments 81 (2010) 10D313.
3) T. Hirouchi, M. Nishiura, T. Nagasaka, T. Ido, M. Sasao, K. Fujioka, M. Isobe, and T. Mutoh, "Effect of ion beam and neutron irradiations on the luminescence of polycrystalline Ce-doped Y3Al5O12 ceramics", Journal of Nuclear Materials 386-388 (2009) 1049-1051.
4) M. Nishiura, M. Sasao, and M. Bacal, "H- laser photodetachment at 1064, 532, and 355 nm in plasma", Journal of Applied Physics, Vol.83, (1998) 2944-2949.
5) M. Nishiura, M. Sasao, M. Wada, and M. Bacal, "Plasma perturbation induced by laser photodetachment”, Physical Review E. Vol. 63 March(2001)#036408.
6) M. Nishiura, T. Ido, A. Shimizu, S. Kato, K. Tsukada, A. Nishizawa, Y. Hamada, Y. Matsumoto, A. Mendenilla, and M. Wada, "Optimization of negative ion sources for a heavy ion beam probe", Review of Scientific Instruments, 77 (2006) 03A537.

Other Activities
The Physical Society of Japan (JPS)
The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF), (2000-2001, manager of region 2)
The Japan Society of Applied Physics (JSAP)
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Future Plan
We explore a new physics through experimental and theoretical studies in the magnetsphere plasma device RT-1. Corresponding new technologies will be developed.

Messages to Students
We welcome all who have an idea that they want to explore in a research field. Our laboratory will support you and help bring your ideas to fruition.
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