TY - JOUR
T1 - Local plasma parameter measurements in colliding laser-produced plasmas for studying magnetic reconnection
AU - Morita, T.
AU - Tomita, K.
AU - Sakai, K.
AU - Takagi, M.
AU - Aihara, K.
AU - Edamoto, M.
AU - Egashira, S.
AU - Higuchi, T.
AU - Ishizaka, N.
AU - Izumi, T.
AU - Kakuchi, S.
AU - Kojima, T.
AU - Kuramitsu, Y.
AU - Matsukiyo, S.
AU - Nakagawa, Y.
AU - Minami, T.
AU - Murakami, H.
AU - Nishioka, Y.
AU - Ota, M.
AU - Sano, T.
AU - Sei, S.
AU - Sugiyama, K.
AU - Tanaka, S. J.
AU - Yamazaki, R.
AU - Sakawa, Y.
N1 - Funding Information:
The authors would like to acknowledge the dedicated technical support of the staff at the Gekko-XII facility for the laser operation, target fabrication, and plasma diagnostics. We would also like to thank N. Yamamoto and S. Zenitani for helpful comments and valuable discussions. This research was partially supported by JSPS KAKENHI Grant Nos. 18H01232 , 17H06202 , 15H02154 , 17K14876 , and 17H18270 and by the joint research project of Institute of Laser Engineering, Osaka University.
Funding Information:
The authors would like to acknowledge the dedicated technical support of the staff at the Gekko-XII facility for the laser operation, target fabrication, and plasma diagnostics. We would also like to thank N. Yamamoto and S. Zenitani for helpful comments and valuable discussions. This research was partially supported by JSPS KAKENHI Grant Nos. 18H01232, 17H06202, 15H02154, 17K14876, and 17H18270 and by the joint research project of Institute of Laser Engineering, Osaka University.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/8
Y1 - 2020/8
N2 - We have implemented laser Thomson scattering for local plasma measurement of electron and ion temperatures, electron density, flow velocity, and charge state. The electron density increases by two times in the interaction of two plasma flows, indicating collisionless interaction. The density and velocity show fluctuations only at t=40 ns, and the density suddenly decreases, indicating the plasma ejection from the interaction region, which can be explained by a magnetic reconnection. The electron temperature in the double-flow is larger than that in the single flow. This may be explained by the energy transfer from the plasma kinetic energy to thermal energy. The ion temperature is much larger than electron temperature in the double-flow, and this may be explained by collisional effects between two plasmas, and/or possibly interpreted as a thermalization due to magnetic reconnection.
AB - We have implemented laser Thomson scattering for local plasma measurement of electron and ion temperatures, electron density, flow velocity, and charge state. The electron density increases by two times in the interaction of two plasma flows, indicating collisionless interaction. The density and velocity show fluctuations only at t=40 ns, and the density suddenly decreases, indicating the plasma ejection from the interaction region, which can be explained by a magnetic reconnection. The electron temperature in the double-flow is larger than that in the single flow. This may be explained by the energy transfer from the plasma kinetic energy to thermal energy. The ion temperature is much larger than electron temperature in the double-flow, and this may be explained by collisional effects between two plasmas, and/or possibly interpreted as a thermalization due to magnetic reconnection.
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U2 - 10.1016/j.hedp.2020.100754
DO - 10.1016/j.hedp.2020.100754
M3 - Article
AN - SCOPUS:85082016256
SN - 1574-1818
VL - 36
JO - High Energy Density Physics
JF - High Energy Density Physics
M1 - 100754
ER -