TY - JOUR
T1 - Detection of current-sheet and bipolar ion flows in a self-generated antiparallel magnetic field of laser-produced plasmas for magnetic reconnection research
AU - Morita, Taichi
AU - Kojima, T.
AU - Matsuo, S.
AU - Matsukiyo, S.
AU - Isayama, S.
AU - Yamazaki, R.
AU - Tanaka, S. J.
AU - Aihara, K.
AU - Sato, Y.
AU - Shiota, J.
AU - Pan, Y.
AU - Tomita, Kentaro
AU - Takezaki, T.
AU - Kuramitsu, Y.
AU - Sakai, K.
AU - Egashira, S.
AU - Ishihara, H.
AU - Kuramoto, O.
AU - Matsumoto, Y.
AU - Maeda, K.
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. Ozaki for the target alignment in the experiment, and M. Hoshino, S. Zenitani, Y. Ohira, and N. Yamamoto for helpful comments and valuable discussions. This research was partially supported by JSPS KAKENHI Grants No. JP22H01251, No. JP22H00119, No. JP20H01881, No. JP20K20285, No. JP18H01232, and No. JP17H06202, JSPS Core-to-Core Program B:Asia- Africa Science Platforms Grant No. JPJSCCB20190003, and by the joint research project of the Institute of Laser Engineering, Osaka University.
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/11
Y1 - 2022/11
N2 - Magnetic reconnection in laser-produced magnetized plasma is investigated by using optical diagnostics. The magnetic field is generated via the Biermann battery effect, and the inversely directed magnetic field lines interact with each other. It is shown by self-emission measurement that two colliding plasmas stagnate on a midplane, forming two planar dense regions, and that they interact later in time. Laser Thomson scattering spectra are distorted in the direction of the self-generated magnetic field, indicating asymmetric ion velocity distribution and plasma acceleration. In addition, the spectra perpendicular to the magnetic field show different peak intensity, suggesting an electron current formation. These results are interpreted as magnetic field dissipation, reconnection, and outflow acceleration. Two-directional laser Thomson scattering is, as discussed here, a powerful tool for the investigation of microphysics in the reconnection region.
AB - Magnetic reconnection in laser-produced magnetized plasma is investigated by using optical diagnostics. The magnetic field is generated via the Biermann battery effect, and the inversely directed magnetic field lines interact with each other. It is shown by self-emission measurement that two colliding plasmas stagnate on a midplane, forming two planar dense regions, and that they interact later in time. Laser Thomson scattering spectra are distorted in the direction of the self-generated magnetic field, indicating asymmetric ion velocity distribution and plasma acceleration. In addition, the spectra perpendicular to the magnetic field show different peak intensity, suggesting an electron current formation. These results are interpreted as magnetic field dissipation, reconnection, and outflow acceleration. Two-directional laser Thomson scattering is, as discussed here, a powerful tool for the investigation of microphysics in the reconnection region.
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U2 - 10.1103/PhysRevE.106.055207
DO - 10.1103/PhysRevE.106.055207
M3 - Article
C2 - 36559487
AN - SCOPUS:85142328582
SN - 2470-0045
VL - 106
JO - Physical Review E
JF - Physical Review E
IS - 5
M1 - 055207
ER -