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Experimental Evidence for Reflected Ions and Ion Temperature Anisotropy in a Forming Supercritical Magnetized Collisionless Shock
Abstract
Supercritical magnetized collisionless shocks require ion reflection for dissipation, yet its role during formation remains unclear. Using high-power lasers, self-emission imaging, and collective Thomson scattering, we investigate a forming quasi-perpendicular shock. An upstream emission tail is consistent with a foot-like structure, while ion heating and temperature anisotropy extend upstream of a ramp-like region. These observations provide evidence of reflected-ion-related heating during early shock formation, although the incident and reflected ion populations are not separately resolved. Future measurements of ion distributions and plasma waves could clarify how this heating mediates shock dissipation and particle energization.
Versions
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BibTeX
@misc{yamazaki2026experimental,
title = {{Experimental Evidence for Reflected Ions and Ion Temperature Anisotropy in a Forming Supercritical Magnetized Collisionless Shock}},
author = {Ryo Yamazaki and T. Takezaki and T. Morita and S. Tomita and S. J. Tanaka and Y. Ohira and T. Umeda and K. Aihara and S. Kambayashi and R. Kawamura and K. Obayashi and M. Murakoshi and Y. Sato and R. Shiina and A. Takata and K. Matsui and S. Ueno and Y. Kidokoro and S. Yakura and Y. Okada and S. Suzuki and H. Kondo and N. Shimoda and J. Shiota and Y. Sudo and D. Suzuki and K. Sugiyama and A. Morita and H. Kawakatsu and A. Kashima and Y. Ishimura and K. Umehara and S. Egashira and H. Ishihara and O. Kuramoto and Y. Matsumoto and K. Maeda and Y. Suzuki and M. Hanano and Y. Toyoda and K. Kuramoto and F. Nikaido and K. Iida and Y. Naito and Y. Sato and K. Takahashi and K. Nakahara and Y. Maenosono and Y. Muramoto and Y. Kanesada and K. Koba and T. Ogawa and R. Shiiba and T. Oguchi and M. Edamoto and M. Iwamoto and M. Hoshino and T. Inoue and S. Isayama and A. T. Ishii},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.34058},
eprint = {2610.34058},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.34058},
}
RIS
TY - UNPB
TI - Experimental Evidence for Reflected Ions and Ion Temperature Anisotropy in a Forming Supercritical Magnetized Collisionless Shock
AU - Ryo Yamazaki
AU - T. Takezaki
AU - T. Morita
AU - S. Tomita
AU - S. J. Tanaka
AU - Y. Ohira
AU - T. Umeda
AU - K. Aihara
AU - S. Kambayashi
AU - R. Kawamura
AU - K. Obayashi
AU - M. Murakoshi
AU - Y. Sato
AU - R. Shiina
AU - A. Takata
AU - K. Matsui
AU - S. Ueno
AU - Y. Kidokoro
AU - S. Yakura
AU - Y. Okada
AU - S. Suzuki
AU - H. Kondo
AU - N. Shimoda
AU - J. Shiota
AU - Y. Sudo
AU - D. Suzuki
AU - K. Sugiyama
AU - A. Morita
AU - H. Kawakatsu
AU - A. Kashima
AU - Y. Ishimura
AU - K. Umehara
AU - S. Egashira
AU - H. Ishihara
AU - O. Kuramoto
AU - Y. Matsumoto
AU - K. Maeda
AU - Y. Suzuki
AU - M. Hanano
AU - Y. Toyoda
AU - K. Kuramoto
AU - F. Nikaido
AU - K. Iida
AU - Y. Naito
AU - Y. Sato
AU - K. Takahashi
AU - K. Nakahara
AU - Y. Maenosono
AU - Y. Muramoto
AU - Y. Kanesada
AU - K. Koba
AU - T. Ogawa
AU - R. Shiiba
AU - T. Oguchi
AU - M. Edamoto
AU - M. Iwamoto
AU - M. Hoshino
AU - T. Inoue
AU - S. Isayama
AU - A. T. Ishii
PY - 2026
DA - 2026/10/25
PB - arXiv
DO - 10.48550/arxiv.2610.34058
UR - https://arxiv.org/abs/2610.34058
AB - Supercritical magnetized collisionless shocks require ion reflection for dissipation, yet its role during formation remains unclear. Using high-power lasers, self-emission imaging, and collective Thomson scattering, we investigate a forming quasi-perpendicular shock. An upstream emission tail is consistent with a foot-like structure, while ion heating and temperature anisotropy extend upstream of a ramp-like region. These observations provide evidence of reflected-ion-related heating during early shock formation, although the incident and reflected ion populations are not separately resolved. Future measurements of ion distributions and plasma waves could clarify how this heating mediates shock dissipation and particle energization.
ER -