Hoshino, Kazuo

写真a

Affiliation

Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics （Yagami）

Position

Associate Professor

Related Websites

External Links
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Career 【 Display / hide 】

  • 2008.04
    -
    2011.03

    Japan Atomic Energy Agency, Sector of Fusion Research and Development, Postdoctoral Fellow

  • 2011.04
    -
    2016.03

    Japan Atomic Energy Agency, Sector of Fusion Research and Development, Researcher

  • 2016.04
    -
    2016.06

    National Institutes for Quantum and Radiological Science and Technology, Fusion Energy Research and Development Directorate, Senior Researcher

  • 2016.07
    -
    2018.03

    National Institutes for Quantum and Radiological Science and Technology, Fusion Energy Research and Development Directorate, Principal Researcher

  • 2018.04
    -
    Present

    Keio University, Faculty of Science and Technology, Associate Professor

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Academic Background 【 Display / hide 】

  • 1998.04
    -
    2002.03

    Keio University, Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics

    University, Graduated

  • 2003.04
    -
    2005.03

    Keio University, Graduate School of Science and Technology, School of Fundamental Science and Technology

    Graduate School, Completed, Master's course

  • 2005.04
    -
    2008.03

    Keio University, Graduate School of Science and Technology, School of Fundamental Science and Technology

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • 博士（工学）, Keio University, Coursework

    トカマクにおける境界層プラズマ流の構造と重金属不純物輸送に関する研究

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Research Areas 【 Display / hide 】

  • Energy Engineering / Fundamental plasma

  • Energy Engineering / Nuclear fusion

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Research Keywords 【 Display / hide 】

  • Plasma

  • Computer Simulation

  • Fusion

  • Divertor Plasma

  • Ion source plasma

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Papers 【 Display / hide 】

  • Development and Application of SONIC Divertor Simulation Code to Power Exhaust Design of Japanese DEMO Divertor

    N. Asakura, K. Hoshino, Y. Homma, Y. Sakamoto

    Processes 10   872 2022.04

    Research paper (scientific journal), Joint Work, Accepted

  • Numerical study of different electron density observed in a Hydrogen and Deuterium negative ion source plasma

    T. Shibata, R. Kato, H. Nakano, K. Hayashi, J. Sato, K. Miyamoto, K. Hoshino, A. Hatayama

    Journal of Physics: Conference Series 2244   012002 2022.04

    Research paper (international conference proceedings), Joint Work, Accepted

  • Numerical analysis of isotope effect in NIFS negative ion source

    R. Kato, K. Hoshino, H. Nakano, T. Shibata, K. Miyamoto, A. Hatayama

    Journal of Physics: Conference Series 2244   012035 2022.04

    Research paper (international conference proceedings), Joint Work, Accepted

  • Study of negative ion beam emittance characteristics using 3D PIC-MCC simulation

    K. Miyamoto, A. Hatayama, K. Nagaoka, N. Haruhisa, K. Hoshino, T. Shibata, K. Tsumori

    Journal of Physics: Conference Series 2244   012040 2022.04

    Research paper (international conference proceedings), Joint Work, Accepted

  • Power exhaust concepts and divertor designs for Japanese and European DEMO fusion reactors

    Nobuyuki Asakura and Kazuo Hoshino and Satoshi Kakudate and Fabio Subba and Christian Vorpahl and Yuki Homma and Hiroyasu Utoh and Youji Someya and Yoshiteru Sakamoto and Ryoji Hiwatari and Satoshi Suzuki and Jeong-Ha You and Mattia Siccinio and Gianfranco Federici

    Nuclear Fusion （{IOP} Publishing)  61 （ 12 ）  2021.10

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  00295515

    　View Summary

    Concepts of the power exhaust and divertor design have been developed, with a high priority in the pre-conceptual design phase of the Japan-Europe broader approach DEMO design activity (BA DDA). Common critical issues are the large power exhaust and its fraction in the main plasma and divertor by the radiative cooling (P radtot/P heat 0.8). Different exhaust concepts in the main plasma and divertor have been developed for Japanese (JA) and European (EU) DEMOs. JA proposed a conventional closed divertor geometry to challenge large P sep/R p handling of 30-35 MW m-1 in order to maintain the radiation fraction in the main plasma at the ITER-level (f radmain = P radmain/P heat ∼ 0.4) and higher plasma performance. EU challenged both increasing f radmain to ∼0.65 and handling the ITER-level P sep/R p in the open divertor geometry. Power exhaust simulations have been performed by SONIC (JA) and SOLPS5.1 (EU) with corresponding P sep = 250-300 MW and 150-200 MW, respectively. Both results showed that large divertor radiation fraction (P raddiv/P sep 0.8) was required to reduce both peak q target (10 MW m-2) and T e,idiv. In addition, the JA divertor performance with EU-reference P sep of 150 MW showed benefit of the closed geometry to reduce the peak q target and T e,idiv near the separatrix, and to produce the partial detachment. Integrated designs of the water cooled divertor target, cassette and coolant pipe routing have been developed in both EU and JA, based on the tungsten (W) monoblock concept with Cu-alloy pipe. For year-long operation, DEMO-specific risks such as radiation embrittlement of Cu-interlayers and Cu-alloy cooling pipe were recognized, and both foresee higher water temperature (130 °C-200 °C) compared to that for ITER. At the same time, several improved technologies of high heat flux components have been developed in EU, and different heat sink design, i.e. Cu-alloy cooling pipes for targets and RAFM steel ones for the baffle, dome and cassette, was proposed in JA. The two approaches provide important case-studies of the DEMO divertor, and will significantly contribute to both DEMO designs.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • 小特集統合コードによる磁場閉じ込め核融合プラズマシミュレーションの現状と今後の展望：　２．統合コードを構成する物理モジュール群

    村上定義，本多充，相羽信行，松山顕之，林伸彦，星野一生，藤田隆明，福山淳，横山雅之

    プラズマ・核融合学会誌 95 ( 09 ) 427 - 436 2019.09

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • 小特集　原型炉に向けてのダイバータの研究開発課題ー現状と展望ー：　２．日本における原型炉ダイバータ概念の現状と開発課題

    朝倉伸幸、星野一生

    プラズマ・核融合学会誌 92 ( 12 ) 870 - 876 2016.12

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • 小特集　原型炉に向けてのダイバータの研究開発課題ー現状と展望ー：3 非接触プラズマと熱・粒子処理に関するダイバータ実験研究およびモデリングの現状と研究開発課題　3.2 ダイバータモデリング研究

    星野一生

    プラズマ・核融合学会誌 92 ( 12 ) 882 - 885 2016.12

    Article, review, commentary, editorial, etc. (scientific journal), Single Work

  • 小特集 DEMOに向けた直線型装置を用いた境界プラズマ、プラズマ・壁相互作用研究： １．直線型プラズマ生成装置の現状と原型炉ダイバータ設計における課題

    坂本瑞樹、大野哲靖、朝倉伸幸、星野一生

    プラズマ・核融合学会誌 90 ( 08 ) 473 - 479 2014.08

    Article, review, commentary, editorial, etc. (scientific journal), Joint Work

  • 小特集 核融合プラズマおよびダイバータにおけるタングステン研究の進展と課題： 4. タングステン不純物輸送モデリングの進展と課題

    星野一生

    プラズマ・核融合学会誌 87 ( 09 ) 600 - 606 2011.09

    Article, review, commentary, editorial, etc. (scientific journal), Single Work

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Presentations 【 Display / hide 】

  • Effect of negative ion sheath on beam extraction in negative hydrogen ion sources

    K. Hayashi, K. Hoshino, K. Miyamoto, A. Hatayama

    International Conference on Ion Sources, 

    2021.09
    , 

    Oral presentation (general)

  • Investigation of neutral-neutral collision model in the DEMO level divertor by SONIC simulation

    K. Hoshino, S. Tokunaga, S. Yamoto, Y. Homma, N. Asakura

    The 18th International Workshop on Plasma Edge Theory in Fusion Devices, 

    2021.09
    , 

    Poster presentation

  • Improvement of Neutral Transport Model in SONIC toward DEMO

    M. Nakano, S. Yamoto, Y. Homma, N. Asakura

    The 18th International Workshop on Plasma Edge Theory in Fusion Devices, 

    2021.09
    , 

    Poster presentation

  • Detached helium plasma simulation with collisional-radiative model

    H. Tanaka, I. Saeki, N. Ohno, S. Kajita, T. Ido, H. Natsume, A. Hatayama, K. Hoshino, K. Sawada, M. Goto

    The 40th JSST Annual International Conference on Simulation Technology, 

    2021.09
    , 

    Oral presentation (general)

  • Plasma Exhaust and Divertor Designs in Japan and Europe Broader Approach, DEMO Design Activity

    N. Asakura, K. Hoshino, Y. Homma, C. Vorpahl, F. Subba, H. Utoh, Y. Someya, S. Kakudate S. Suzuki, Y. Sakamoto, R. Hiwatari, M. Siccinio, G. Federici, J.-H. You

    28th IAEA Fusion Energy Conference (online) , 

    2021.05
    , 

    Poster presentation

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 消えるプラズマの時空間構造を支配する物理・化学機構の解明と制御

    2020.04
    -
    2024.03

    Nagoya University, Grant-in-Aid for Scientific Research (A), Research grant, Coinvestigator(s)

    　View Summary

    プラズマプロセッシングや核融合研究において重要な課題となっている気相中で消えるプラズマの物性を明らかにする。電子・イオン再結合（三体再結合，放射再結合）が主要な過程となる再結合プラズマ中の非熱平衡性，電位構造に関連した熱・粒子輸送過程を，直線型高密度プラズマ発生装置を用いた基礎実験とシミュレーションとの相補的な研究により明らかにする。また，振動励起水素分子により駆動される再結合（分子駆動再結合）プラズマ生成に関して，固体壁で生成される振動・回転励起水素分子の影響と同位体効果を明らかにする。さらに，再結合プラズマのパルス応答を高時間分解で調べ，時空間変化を決定する物理・化学過程を明らかにする。

  • 重水素負イオン源における同位体効果の物理メカニズムの理論的解明

    2019.04
    -
    2022.03

    Naruto University of Education, Grant-in-Aid for Scientific Research (C), Coinvestigator(s)

    　View Summary

    本研究は重水素負イオン源について、運動論的粒子モデルに基づく数値計算シミュレーションにより、負イオン源のドライバー領域から引出・加速部までを総括的にモデリングし、「研究の目的」に挙げた同位体効果と呼ばれる水素の場合と異なる物理特性のメカニズムを解明することが目的である。そして得られた知見により、核融合や医療用加速器等において、研究開発が進められている重水素負イオン源の実現に貢献する。

  • 運動論的統合モデリングによる非接触ダイバータプラズマの動的応答特性の解明

    2019.04
    -
    2022.03

    Keio University, Grant-in-Aid for Scientific Research (C), No Setting, Principal investigator

    　View Summary

    核融合原型炉に向けた最重要課題であるダイバータにかかる熱・粒子負荷の低減には、非接触ダイバータプラズマの形成と制御が必須である。本研究課題では、この非接触ダイバータプラズマの物理機構と動的応答特性の解明を目的とする。まず、プラズマPIC(Particle in Cell)モデルと先進的中性粒子輸送コードを用いて、ダイバータプラズマの基本的な動特性の理解を進める。その後、これらのモデルを結合した運動論的統合シミュレーションコードを開発する。開発した統合コードを用いて、非接触ダイバータプラズマの動的応答特性について総合的な理解を進め、その物理機構を明らかにする。

  • Kinetic Modeling of Fusion Edge Plasma and Dynamic Characteristics of Detachemnt Plasmas

    2015.04
    -
    2018.03

    Keio University, Hatayama Akiyoshi, Sawada Keiji, Tsumori Katuyoshi, Kojima Atsushi, Murakami Izumi, Nakamura Hiroaki, Nakashima Yousuke, Lettry Jacques, Grant-in-Aid for Scientific Research (B), Research grant, Coinvestigator(s)

    　View Summary

    The final goal of this study is to develop a new kinetic simulation tool of plasmas, neutrals, and impurities in fusion edge plasmas. Taking into account the non-equilibrium and non-steady characteristics of electron energy distribution function (EEDF), we have done a dynamic simulation of the ELM (Edge Localized Mode). The effect of the ELM on the plasma detachment has been studied. Especially. the effects of the ELM on the MAR (Molecular Activated Recombination) has been analyzed. The results show that the vibrational excited molecules, which play a key for MAR, are effectively produced during the ELM heat pulse. Due to this enhancement, MAR rate is possibly enhanced after the ELM pulse. In addition, a new kinetic impurity transport model has been successfully developed. The model includes neo-classical transport effects of impurities, which becomes important under the steep density/temperature gradient in the core pedestal region before and after the ELM pulse.

  • Study of the Detached Divertor Plasma under Huge Heat Flux Condition

    2015.04
    -
    2018.03

    Japan Atomic Energy Agency, Kazuo Hoshino, Grant-in-Aid for Young Scientists (B), Research grant, Principal investigator

    　View Summary

    Control of the detached divertor plasma and the resultant reduction of the divertor heat load are one of the most critical issues on the fusion DEMO design study. In this study, understanding of the detached divertor plasma has progressed by analysis of the experimental data and development of the divertor simulation code has progressed. Control of the detached divertor plasma and reduction of the divertor heat load by using impurity seeding has been also investigated.

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Courses Taught 【 Display / hide 】

  • SCIENCE OF ATOMIC ENERGY

    2022

  • PRESENTATION TECHNIQUE

    2022

  • PLASMA PHYSICS

    2022

  • PLASMA PHYSICS

    2022

  • INDEPENDENT STUDY ON FUNDAMENTAL SCIENCE AND TECHNOLOGY

    2022

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Memberships in Academic Societies 【 Display / hide 】

  • The Japan Society of Plasma Science and Nuclear Fusion Research, 

    2001.08
    -
    Present
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Committee Experiences 【 Display / hide 】

  • 2019.07
    -
    Present

    炉心プラズマ共同企画委員会　理論シミュレーション専門部会　専門委員, 量子科学技術研究開発機構

  • 2017.07
    -
    2019.06

    編集委員, プラズマ・核融合学会

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