SAWADA, KEIJI | Shinshu University Researcher Directory

Academic Organization	Academic Assembly　School of Science and Technology　Institute of Engineering	TEL
Education and Research Organization	Faculty of Engineering　Division of Mathematics and Physics	FAX
Position	Professor	Mail Address
Address	4-17-1, Wakasato, Nagano, 380-8553, Japan	Web site

Profile

Assigned Class: Graduate School, Division of Science and Technology
Interdisciplinary Graduate School of Science and Technology

Research Field: Plasma science

Current Subject: Plasma Spectroscopy
Keywords:plasma , spectroscopy , collisional-radiative model , nuclear fusion

Academic Background: Graduate School
Kyoto University , 1994
Kyoto University , 1989

College
Kyoto University , 1987

Degree
Doctor of Engineering , kyoto University

Research

Books, Articles, etc.: Articles
Isotope effect of rovibrational distribution of hydrogen molecules desorbed from amorphous carbon
JAPANESE JOURNAL OF APPLIED PHYSICS,61(SA):SA1005 2022
Author:Nakamura, Hiroaki; Saito, Seiki; Sawada, Takumi; Sawada, Keiji; Kawamura, Gakushi; Kobayashi, Masahiro; Hasuo, Masahiro;

Electron and Proton Energy Loss via Rovibrational Excitation of Molecular Hydrogen in Fusion Detached Plasmas
Plasma and Fusion Research,17:2403044-1-4 2022
Author:Keiji SAWADA

Reduction of pulsed particle load with dynamic pressure induced by transient recycled neutral flux
Plasma Physics and Controlled Fusion,64:105013 2022
Author:Yuki Hayashi, Hirohiko Tanaka, Noriyasu Ohno, Shin Kajita, Thomas Morgan, Hennie van der Meiden, John Scholten, Jordy Vernimmen, Hiroki Natsume, Keiji Sawada, Shota Masuda

Ro-vibrational population distribution in the ground state of hydrogen isotopologues in LHD peripheral plasmas deduced from emission spectroscopy
Journal of Quantitative Spectroscopy & Radiative Transfer,267:107592 2021
Author:Hiroki Ishihara, Arseniy Kuzmin, Masahiro Kobayashi, Taiichi Shikama, Keiji Sawada, Seiki Saito, Hiroaki Nakamura, Keisuke Fujii, Masahiro Hasuo, the LHD Experiment Group.

Neutral transport code for rovibrational population calculation of molecular hydrogen in large helical device plasmas
Contrib. Plasm. Phys.,:e201900153 2020
Author:K. Sawada, H. Nakamura, S. Saito, G. Kawamura, M. Kobayashi, K. Haga, R. Migita, T. Sawada, M. Hasuo

Molecular Dynamics Simulation Model of Hydrogen Recycling on Carbon Divertor for Neutral Transport Analysis in LHD
Contrib. Plasm. Phys.,:e201900152 2020
Author:S. Saito, H. Nakamura, K. Sawada, G. Kawamura, M. Kobayashi, M. Hasuo

Detached helium plasma simulation by a one-dimensional fluid code with detailed collisional-radiative model
PHYSICS OF PLASMAS,27(10):102505 2020
Author:Tanaka, H.; Saeki, I.; Ohno, N.; Kajita, S.; Ido, T.; Natsume, H.; Hatayama, A.; Hoshino, K.; Sawada, K.; Goto, M.

Development of a Molecular Dynamics Method with Heat Transfer into Bulk for Ion Injection into Materials
PLASMA AND FUSION RESEARCH,15:2403073 2020
Author:Saito, Seiki; Nakamura, Hiroaki; Sawada, Keiji; Kobayashi, Masahiro; Gakushi, Kawamura; Masahiro, Hasuo

Molecular dynamics simulation for hydrogen recycling on tungsten divertor for neutral transport analysis
JAPANESE JOURNAL OF APPLIED PHYSICS,(60):SAAB08 2020
Author:Saito, Seiki; Nakamura, Hiroaki; Sawada, Keiji; Kobayashi, Masahiro; Kawamura, Gakushi; Sawada, Takumi; Masahiro, Hasuo

Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST
ATOMS,8:44 2020
Author:Mori, Satoru; Shikama, Taiichi; Hanada, Kazuaki; Yoneda, Nao; Kuzmin, Arseniy; Hasuo, Masahiro; Idei, Hiroshi; Onchi, Takumi; Ejiri, Akira; Osawa, Yuki; Peng, Yi; Matsuzaki, Kyohei; Kado, Shinichiro; Sawada, Keiji; Ido, Takeshi; Nakamura, Kazuo; Ikezoe, Ryuya; Nagashima, Yoshihiko; Hasegawa, Makoto; Kuroda, Kengo; Higashijima, Aki; Nagata, Takahiro; Shimabukuro, Shun

Impact of additional plasma heating on detached plasma formation in divertor simulation experiments using the GAMMA 10/PDX tandem mirror
Nuclear Materials and Energy,18:216-221 2019
Author:Y. Nakashima, M.S. Islam, T. Iijima, M. Sakamoto, N. Ezumi, M. Yoshikawa, N. Asakura, M. Fukumoto, A. Hatayama, M. Hirata, M. Ichimura, R. Ikezoe, T. Imai, M.M. Islam, T. Kariya, J. Kohagura, S. Masuzaki, R. Minami, T. Nakano, K. Nojiri, T. Numakura, K. Sawada, M. Shoji, A. Terakado, S. Togo, S. Yamashita, T. Yoshimoto

Reaction processes of molecular activated recombination leading to detachment of divertor simulation plasma in GAMMA 10/PDX
Nuclear Materials and Energy,20:100679 2019
Author:A. Terakado, M. Sakamoto, N. Ezumi, K. Nojiri, T. Mikami, Y. Kinoshita, S. Togo, T. Iijima, K. Sawada, S. Kado, Y. Nakashima

Hydrogen recycling study with a high temperature target in the divertor simulation experiment in GAMMA 10 / PDX
Plasma and Fusion Research,13:3402096 2018
Author:Akihiro TERAKADO, Mizuki SAKAMOTO, Naomichi EZUMI, Kunpei NOJIRI, Tomohiro MIKAMI, Satoshi TOGO, Takaaki IIJIMA, Takayuki YOKODO, Keiji SAWADA

Molecular activated recombination in divertor simulation plasma on GAMMA 10/PDX
Nuclear Materials and Energy,12:1004-1009 2017
Author:M. Sakamoto, A. Terakado, K. Nojiri, N. Ezumi, Y. Nakashima, K. Sawada, K. Ichimura, M. Fukumoto, K. Oki, K. Shimizu, N. Ohno, S. Masuzaki, S. Togo, J. Kohagura, M. Yoshikawa

Rovibrationally Resolved Time-Dependent Collisional-Radiative Model of Molecular Hydrogen and Its Application to a Fusion Detached Plasma
Atoms,4(4):29 2016
Author:Keiji Sawada and Motoshi Goto

Photon Trapping Effects in DEMO Divertor Plasma
Contrib. Plasma Phys,56:657–662 2016
Author:K. Hoshino, K. Sawada, R. Idei, S. Tokunaga, N. Asakura, K. Shimizu, N. Ohno

Particle source and edge confinement study based on spectroscopic diagnosis in the LHD
Plasma Physics and Controlled Fusion,58:84001-84005 2016
Author:M. Goto, K. Sawada, T. Oishi, S. Morita

Energy Density Dependence of Hydrogen Combustion Efficiency in Atmospheric Pressure Microwave Plasma
Fusion Science and Technology,67:650-653 2015
Author:T. Yoshida, N. Ezumi, K. Sawada, Y. Tanaka, M. Tanaka, K. Nishimura

Hydrogen atomic and molecular emission locations and intensities in the LHD edge plasma determined from simultaneously observed polarization spectra
Plasma and Fusion Research,10:3402041 2015
Author:K. Fujii, K. Sawada, M Goto, S. Morita, M. Hasuo

Influence of Plasma-Neutral Collisions on Probe Measurements in Atmospheric Pressure Plasmas
Contributions to Plasma Physics,54:304–307 2014
Author:N. Ezumi, K. Takahashi, T. Yoshida, Y. Hatada, Y. Hayashi, C. Uchiyama, S. Iio, K. Sawada, N. Ohno, Zh. Kiss'ovski

Determination of electron temperature and density at plasma edge in the Large Helical Device with opacity-incorporated helium collisional-radiative model
Journal of Quantitative Spectroscopy and Radiative Transfer,137:23-28 2014
Author:M. Goto, K. Sawada

Numerical study of the H0 atomic density and the Balmer line intensity profiles in a hydrogen negative ion source with the effect of non-equilibrium electron energy distribution function
Plasma and Fusion Research,9:1401011 2014
Author:Takanori Shibata, Mieko Kashiwagi, Akiyoshi Hatayama, Keiji Sawada, Takashi Inoue, Masaya Hanada

Deuterium atomic density estimation in recombining plasmas using self‐absorption spectroscopy
IEEJ Transactions on Electrical and Electronic Engineering,8:1-6 2013
Author:S. Kajita, T. Nishiwaki, N. Ohno, Noriyasu, K. Sawada, M. Takagi

Influence of the Probe Electrode on Probe Measurements for Atmospheric Pressure Microwave Plasma Torch
Contrib. Plasma Phys.,53:81-85 2013
Author:N. Ezumi, N. Kodama, K. Akahane, S. Shiozawa, K. Sawada, N. Ohno

Optical Emission and Mass Spectra Observations during Hydrogen Combustion in Atmospheric Pressure Microwave Plasma
Plasma and Fusion Research,7:2401075 2012
Author:N. Ezumi, K. Akahane, K. Sawada, Y. Tanaka, M. Tanaka, T. Uda and K. Nishimura

Evaluation of hydrogen atom density in the plasma core regionbased on the Balmer-αline profile
Nucl. Fusion,51:23005 2011
Author:M. Goto, K. Sawada, K. Fujii, M. Hasuo, S. Morita

Spectroscopic diagnostic of helium-hydrogen rf plasma under the influence of radiation trapping
Plasma and Fusion Res.,6:1401010 2011
Author:K. Sawada, M. Goto, N. Ezumi

A Collisional-Radiative Model for Hydrogen Atom Including Velocity Changing Collisions
Plasma and Fusion Research,6:2401125 2011
Author:Keisuke FUJII, Taiichi SHIKAMA, Keiji SAWADA, Motoshi GOTO, Shigeru MORITA and Masahiro HASUO

Collisional-radiative model for spectroscopic diagnostic of optically thick helium plasma
Plasma and Fusion Res.,5:001 2010
Author:K. Sawada, Y. Yamada, T. Miyachika, N.Ezumi, A. Iwamae, M. Goto

Development of multiwavelength-range fine-resolution spectrometer for hydrogen emissions and its applicationto large helical device periphery plasmas
Rev. Sci. Instrum.,81(3):033106 2010
Author:K. Fujii, K. Mizushiri, T. Nishioka, T. Shikama, A. Iwamae, M. Goto, S. Morita,S Kado, K. Sawada, M. Hasuo

FDTD simulation on plasmon in gold nanorod excited by scanning near field optical microscopy
Plasma and Fusion Res.,5:S2110 2010
Author:K. Sawada, H. Nakamura, T. Maruoka, Y. Tamura, K. Imura, T. Saiki, H. Okamoto

Magnetic axial dependency of Hα emission location in peripheral plasmas of Large Helical　Device as determined by plasma　polarization spectroscopy
Plasma and Fusion Res.,5:032 2010
Author:A. Iwamae, A. Sakaue, N. Neshi, J. Yanagibayashi, M. Hasuo, D. Nakamura,　K. Sawada, M. Goto, S. Morita

Atomic and molecular processes with lithium in peripheral plasmas
Fusion Engineering and Design,(85):854–857 2010
Author:I. Murakami, D. Kato, Y. Hirooka, K. Sawada

Simulation of electric quadrupole and magnetic dipole transition efficiencies in optical near fields generated by a subwavelength slit array
J. Phys. Soc. Jpn.,78:024301 2009
Author:K. Deguchi, M. Okuda, A. Iwamae, H. Nakamura, K. Sawada and M. Hasuo

Spatial structure of volume recombination in JT-60U detached divertor plasmas
Plasma and Fusion Res.,4:025 2009
Author:K. Fujimoto, T. Nakano, H. Kubo, K. Sawada, T. Takizuka, H. Kawashima, K. Shimizu, N. Asakura

Alignment creation and deviation from statistical population distribution in hydrogenn = 3 levels observed on MSE spectra of LHD plasma
Plasma Phys. Control. Fusion,51:115004 2009
Author:A. Iwamae, A. Sakaue, M. Atake, K. Sawada, M. Goto, S. Morita

Surface temperature effects on hydrogen and impurity release from the limiter studied by means of visible and near infrared spectroscopic measurement in TRIAM-1M
J. Nucl. Mater.,363-365:938-943 2007
Author:R. Bhattacharyay, H. Zushi, K. Nakashima, T. Shikama, M. Sakamoto, M. Ogawa, K. Nakamura, N. Yoshida, S. Kado, K. Sawada, Y. Hirooka, K. Hanada, K.N. Sato, H. Idei, K. Sasaki, H. Xu, M. Hasegawa, K. Uehara, A. Tsushima, N. Kimura, Y. Nozaki, S. Kawasaki, H. Nakashima, A. Higashijima

Detailed atomic, molecular and radiation kinetics in current 2D and 3D edge plasmafluid codes
,363-365:649-657 2007
Author:D. Reiter, V. Kotov, P. Börner, K. Sawada, R.K. Janev, B. Kuppers

Contribution of hydrogen molecular assisted recombination processes to population of hydrogen atom in divertor simulator MAP-II
J. Nucl. Mater.,363-365:395-399 2007
Author:A. Okamoto, S. Kado, K. Sawada, Y. Kuwahara, Y. Iida, S. Tanaka

Modification of tomography technique for two-dimensional spectroscopic measurement in JT-60U divertor plasmas
Plasma and Fusion Res.,2:S1121 2007
Author:K. Fujimoto, T. Nakano, H. Kubo, K. Sawada, T. Takizuka, K. Shimizu, H. Kawashima,N. Asakura

Simulation of optical near field of a sub-wavelength gold slit array and its electric quadrupole interactionwith 1s excitons in Cu2O
Phys. Stat. Sol.,c 3:3547-3552 2006
Author:M. Okuda, K. Deguchi, A. Iwamae, N. Nakamura, K. Sawada, M. Hasuo

Iterative numerical method for inclusion of radiation trapping into collisional-radiative model
J. Plasma Physics,72:1025-1029 2006
Author:K. Sawada

FDTD modeling of polarization near-field scanning optical microscope
J. Plasma Physics,72:1019-1023 2006
Author:K. Sawada, M. Sakai, Y. Kohashi, T. Saiki and H. Nakamura

Iterative numerical method for the inclusion of radiation trapping into a collisional-radiative model
JOURNAL OF PLASMA PHYSICS,72:1025-1029 2006
Author:Sawada, K

FDTD modeling of a polarization near-field scanning optical microscope
JOURNAL OF PLASMA PHYSICS,72:1019-1023 2006
Author:Sawada, K; Sakai, M; Kohashi, Y; Saiki, T; Nakamura, H

Spectroscopic study of hydrogen particlebehavior in attached and detached divertor plasmas of JT-60U
J. Nucl. Mater.,337-339:161-165 2005
Author:H. Kubo, H. Takenaga, K. Sawada, T. Nakano, S.Kobayashi, S.Higashijima, N. Asakura, K. Shimizu

Determinationof the hydrogen and helium ion densities in the initial and final stages of a plasma in the Large Helical Device by optical spectroscopy
PHYSICS OF PLASMAS,10(5):1402-1410 2003
Author:Goto, M; Morita, S; Sawada, K; Fujimoto, T; Yamamoto, S; Miyazawa, J; Yamada, H; Toi, K

Emission radiation of hydrogen and helium atoms and ions a plasma
CONTRIBUTIONS TO PLASMA PHYSICS,42(2-4):212-217 2002
Author:Goto, M; Sawada, K; Fujimoto, T

Relations between the ionization or recombination flux and the emission radiation for hydrogen and helium in plasma
PHYSICS OF PLASMAS,9(10):4316-4324 2002
Author:Goto, M; Sawada, K; Fujimoto, T

Effect of initial vibrational excitation of molecular hydrogen on molecular assisted recombination in divertor plasmas
CONTRIBUTIONS TO PLASMA PHYSICS,42(6-7):603-607 2002
Author:Sawada, K; Fujimoto, T

FDTD analysis of a near-field optical fiber probe with a double tapered structure
IEICE TRANSACTIONS ON ELECTRONICS,E85C(12):2055-2058 2002
Author:Sawada, K; Nakamura, H; Kambe, H; Saiki, T

Spatial resolution of near-field scanning optical microscopy with sub-wavelength aperture
PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT,(138):173-174 2000
Author:Nakamura, H; Sawada, K; Kambe, H; Saiki, T; Sato, T

Ultraviolet photoemission studies of valence bands in lead halides
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,67(6):2140-2141 1998
Author:Itoh, M; Shiokawa, T; Sawada, K; Kamada, M

Phonon broadening of line widths of Auger-free luminescence in wide-gap ionic crystals
JOURNAL OF LUMINESCENCE,72-4:762-764 1997
Author:Itoh, M; Sawada, K; Hara, H; Ohno, N; Kamada, M

Effective ionization and dissociation rate coefficients of molecular hydrogen in plasma (vol 78, pg 2913, 1995)
JOURNAL OF APPLIED PHYSICS,80(1):606-606 1996
Author:Sawada, K; Fujimoto, T

EFFECTIVE IONIZATION AND DISSOCIATION RATE COEFFICIENTS OF MOLECULAR-HYDROGEN IN PLASMA
JOURNAL OF APPLIED PHYSICS,78(5):2913-2924 1995
Author:SAWADA, K; FUJIMOTO, T

Presentations
Collisional-radiative model of molecular hydrogen
IAEA CRP on atomic and molecular data for state-resolved modelling of hydrogen and helium and their isotopes in fusion plasma 2016
Presenter:Keiji Sawada

Revision of Collisional-Radiative Models and Neutral-Transport Code for Hydrogen and Helium Species
IAEA first Research Coordination Meeting on Atomic and Molecular Data for State-Resolved Modelling of Hydrogen and Helium and Their Isotopes in Fusion Plasma 2011
Presenter:Keiji Sawada

Shinshu University Researcher Directory

SAWADA KEIJI

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Research

SAWADA　KEIJI