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Akademický článek

Fast nondiffusive response of heat and turbulence pulse propagation

Autor: Naoki Kenmochi, Katsumi Ida, Tokihiko Tokuzawa, Yoshinori Mizuno, Ryo Yasuhara, Hisamichi Funaba, Hiyori Uehara, Daniel J. Den Hartog, Mikirou Yoshinuma, Yuki Takemura, Hiroe Igami, Ryoma Yanai

Publikováno v: Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)

Abstract The experimental findings from the Large Helical Device have demonstrated a fast, nondiffusive behavior during the propagation of heat pulses, with an observed increase in speed with reduction in their temporal width. Concurrent propagation

Externí odkaz: https://doaj.org/article/36ff99fbd25142cbb07bc343f5c4d9c3

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Investigation of Capability of Current Control by Electron Cyclotron Waves in the Quasiaxisymmetric Stellarator CFQS

Autor: Yasuo YOSHIMURA, Motonari KANDA, Ryoma YANAI, Akihiro SHIMIZU, Shigeyoshi KINOSHITA, Mitsutaka ISOBE, Shoichi OKAMURA, Kunihiro OGAWA, Hiromi TAKAHASHI, Takanori MURASE, Sho NAKAGAWA, Hiroyuki TANOUE, Haifeng LIU, Yuhong XU

Publikováno v: the 30th International Toki Conference on Plasma and Fusion Research (ITC30)

The capability of plasma current control by the second harmonic electron cyclotron current drive in the quasiaxisymmetric stellarator CFQS is investigated. We used the ray-tracing code TRAVIS to evaluate the electron cyclotron (EC) wave power deposit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44713be9fca7228fd194b5e77df6b8ef
http://hdl.handle.net/10655/00013145

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Collective Thomson scattering diagnostic with in situ calibration system for velocity space analysis in large helical device

Autor: Masaki Nishiura, Shun Adachi, Kenji Tanaka, Shin Kubo, Naoki Kenmochi, Takashi Shimozuma, Ryoma Yanai, Teruo Saito, Hideo Nuga, Ryosuke Seki

Publikováno v: Masaki Nishiura, Shun Adachi, Kenji Tanaka, Shin Kubo, Naoki Kenmochi, Takashi Shimozuma, Ryoma Yanai, Teruo Saito, Hideo Nuga, and Ryosuke Seki, "Collective Thomson scattering diagnostic with in situ calibration system for velocity space analysis in large helical device", Review of Scientific Instruments 93, 053501 (2022) https://doi.org/10.1063/5.0079296

A collective Thomson scattering (CTS) diagnostic with a ±3 GHz band around a 77 GHz gyrotron probe beam was developed to measure the velocity distribution of bulk and fast ions in high-temperature plasmas. We propose a new in situ calibration method

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adfa0a9e35ce565d947529d30e526f4e
https://doi.org/10.1063/5.0079296

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Development of new experimental setup focusing on long-pulse magnetic reconnection by using rotating magnetic field technique

Autor: Michiaki Inomoto, Ryoma Yanai, Y. Takahata

Publikováno v: The Review of scientific instruments. 89(10)

A new closed-type experimental setup to achieve a long-pulse magnetic reconnection in weakly ionized plasmas was developed by using a rotating magnetic field (RMF) technique. The experimental setup has a cylindrical vacuum vessel in which two sets of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a26f8df8beb52816d61a2083bc70802b
https://pubmed.ncbi.nlm.nih.gov/30399850

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