Journal of Fusion Energy最新文献_第3页

Development of Gyrotrons and the High Power Operation for the LHD Experiments 回旋管的研制与LHD实验的大功率运行

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-29 DOI: 10.1007/s10894-026-00587-7

H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, T. Ii Tsujimura, R. Yanai, N. Kenmochi, M. Nishiura, T. Kariya, R. Minami, S. Ito, Y. Mizuno, S. Kobayashi, T. Takeuchi, M. Kanda, H. Takubo

{"title":"Development of Gyrotrons and the High Power Operation for the LHD Experiments","authors":"H. Takahashi, S. Kubo, Y. Yoshimura, H. Igami, T. Ii Tsujimura, R. Yanai, N. Kenmochi, M. Nishiura, T. Kariya, R. Minami, S. Ito, Y. Mizuno, S. Kobayashi, T. Takeuchi, M. Kanda, H. Takubo","doi":"10.1007/s10894-026-00587-7","DOIUrl":"10.1007/s10894-026-00587-7","url":null,"abstract":"<div><p>The electron cyclotron heating (ECH) system has played a key role in plasma heating and control since the earliest stages of the Large Helical System (LHD) project. In this paper, we will show the history of the strategic installation of gyrotrons, which are the core components of the ECH system, into the LHD and the progress of increasing ECH power. In the LHD, total injection power has been increased by repeatedly installing and replacing gyrotrons, and in particular, 1 MW-class gyrotrons, which began operation in 2007 and have led to a significant increase in the ECH power of the LHD. For these gyrotrons, the frequencies of 77–154 GHz were selected to initiate and heat the plasma under a magnetic field strength of 2.75 T for the standard magnetic configuration in the LHD. With the installation of the gyrotrons and a significant increase in millimeter wave power per tube, due to the stepped anode voltage rising, simultaneous ECH injection power into the LHD reached 5.6 MW.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00587-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bayesian Comparison of Kinematic Viscosity Models in Reversed-Field Pinch Fusion Plasmas 反场捏合等离子体运动粘度模型的贝叶斯比较

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-25 DOI: 10.1007/s10894-026-00584-w

J. De Rycke, S. Cappello, G. Spizzo, D. Terranova, M. Veranda, G. Verdoolaege

引用次数: 0

Joining Beryllium to Steel for Fusion Application: An Overview 铍与钢的熔合应用综述

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-18 DOI: 10.1007/s10894-026-00581-z

V. Kirillova, A. Suchkov, N. Popov, P. Piskarev, I. Mazul

引用次数: 0

A New Empirical Formalism for (n,3n) Reaction Cross Sections of Even–Even Nuclei Induced by 14–15 MeV Neutrons 14 - 15mev中子诱导偶偶核（n,3n）反应截面的新经验形式

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-12 DOI: 10.1007/s10894-026-00583-x

Mustafa Yiğit

{"title":"A New Empirical Formalism for (n,3n) Reaction Cross Sections of Even–Even Nuclei Induced by 14–15 MeV Neutrons","authors":"Mustafa Yiğit","doi":"10.1007/s10894-026-00583-x","DOIUrl":"10.1007/s10894-026-00583-x","url":null,"abstract":"<div><p>Direct measurements of nuclear reaction cross sections are not feasible for all target nucleus mass regions and incident particle energies due to experimental difficulties, such as stable target availability, energy resolution, and reaction threshold constraints. In such kind of situation, nuclear cross sections must be evaluated using empirical systematics or theoretical model calculations. In this work, a new empirical formula is presented for the calculation of (n,3n) reaction cross sections induced by 14–15 MeV neutrons, developed within the framework of the statistical model with inclusion of the reaction <span>(:{text{Q}}_{text{n}})</span>-value. It is obtained through a least-squares fit to experimental data for even–even heavy nuclei in the mass range <span>(:146le:text{A}le:238)</span>. The results of the present empirical formula are compared with both experimental data and TALYS 1.95 code calculations. The systematic analysis presented in this paper provides a reference for the (n,3n) reaction channel, particularly in view of the lack of literature data at neutron energies of 14–15 MeV. </p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00583-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148237083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid Vapor-Driven Plasma Contamination and Suppressed Net Lithium Surface Loss in the HIDRA Stellarator HIDRA仿星器中快速蒸汽驱动等离子体污染和抑制净锂表面损失

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-10 DOI: 10.1007/s10894-026-00582-y

Rabel Rizkallah, Andrew Shone, Daniel O’Dea, Davide Curreli, Daniel Andruczyk

引用次数: 0

Simulation of Energetic Particle Driven Instabilities 高能粒子驱动不稳定性的模拟

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-06-03 DOI: 10.1007/s10894-026-00580-0

Hao Wang, Ryosuke Seki, Takeshi Ido, Masaki Osakabe, Yasushi Todo

{"title":"Simulation of Energetic Particle Driven Instabilities","authors":"Hao Wang, Ryosuke Seki, Takeshi Ido, Masaki Osakabe, Yasushi Todo","doi":"10.1007/s10894-026-00580-0","DOIUrl":"10.1007/s10894-026-00580-0","url":null,"abstract":"<div><p>Research on the simulation of energetic particle driven instabilities in the Large Helical Device (LHD) has been actively conducted in recent decades. The progress achieved has been substantial since the last comprehensive review by Todo <i>et al.</i> [29]. Since then, many new simulations have been conducted to investigate the energetic particle driven instabilities in LHD. The simulation studies are mainly focused on the energetic particle driven geodesic acoustic modes (EGAMs), covering both linear properties and nonlinear frequency chirping, as well as the energy channel and anomalous bulk ion heating. In addition, there are also notable studies on the Alfvén eigenmodes (AEs). The energetic particle transport caused by AEs is investigated in different ways. The interchange modes are also simulated under different conditions. In addition to the published works mentioned above, there are also new findings. Both the low-frequency and high-frequency branches of the EGAM are investigated, and various types of energetic particle velocity distribution functions are modeled with different charge-exchange loss rates. The transition between the low-frequency and high-frequency branches of EGAM is determined by the slope of the energetic particle velocity distribution. The low-frequency branch is excited under the condition of a slowing-down distribution, while the high-frequency branch is excited with a bump-on-tail distribution. Furthermore, the bulk pressure perturbation and the energetic particle pressure perturbation are in anti-phase for the low-frequency branch, while they are in-phase for the high-frequency branch.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00580-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlation ECE Measurement System for Electron Temperature Fluctuations in LHD LHD中电子温度波动的相关ECE测量系统

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-05-23 DOI: 10.1007/s10894-026-00579-7

Ryoma Yanai, Tokihiko Tokuzawa, Tatsuhiro Nasu, Masaki Nishiura, Daiki Nishimura

引用次数: 0

Collisional-Radiative Models for Tungsten Ions and Analysis of Extreme Ultraviolet Spectra Measured in LHD Plasma 钨离子的碰撞辐射模型及LHD等离子体中极紫外光谱的分析

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-05-13 DOI: 10.1007/s10894-026-00578-8

Izumi Murakami, Daiji Kato, Akira Sasaki, Tetsutarou Oishi, Hiroyuki A. Sakaue, Motoshi Goto, Tomoko Kawate, Yasuko Kawamoto, Shigeru Morita

{"title":"Collisional-Radiative Models for Tungsten Ions and Analysis of Extreme Ultraviolet Spectra Measured in LHD Plasma","authors":"Izumi Murakami, Daiji Kato, Akira Sasaki, Tetsutarou Oishi, Hiroyuki A. Sakaue, Motoshi Goto, Tomoko Kawate, Yasuko Kawamoto, Shigeru Morita","doi":"10.1007/s10894-026-00578-8","DOIUrl":"10.1007/s10894-026-00578-8","url":null,"abstract":"<div><p>We have constructed collisional-radiative (CR) models for tungsten ions, W<sup>q+</sup>, with q = 18–25, including ionizing and recombining processes as well as collisional excitation/deexcitation and radiative decay, and applied the models to analyze extreme ultraviolet (EUV) spectra measured in magnetically confined fusion plasmas with a tungsten pellet injection into the Large Helical Device (LHD). The CR models are constructed as hybrids with fine-structure levels for lower states and relativistic configuration-averaged levels for higher states to include autoionizing states. The dielectronic recombination process is treated as dielectronic capture to the autoionizing states and radiative decay from the autoionizing states in the CR model. We calculated EUV spectra of the tungsten ions for ionizing and recombining plasmas. Measured spectra at the 2–4 nm region were used to estimate the charge state distribution of tungsten ions in LHD plasmas by comparing calculated emission peaks of <i>n</i> = 4–5 transitions of W<sup>q+</sup> with q = 22–25. Using the estimated ion distribution, the synthesized spectral profile at 4.5–7 nm shows characteristic profiles similar to the measured so-called unresolved transition array (UTA) due to <i>n</i> = 4–4 transitions. We also synthesized the spectra at 10–35 nm, where the UTA due to <i>n</i> = 5–5 transitions appeared, and we partly reproduced the UTA with synthesized spectra. The CR models for the tungsten ions were validated with the measured spectra of LHD plasmas.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00578-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147938268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2-laser Interferometer on the Large Helical Device 大螺旋装置上的co2激光干涉仪

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-05-05 DOI: 10.1007/s10894-026-00570-2

Kenji Tanaka, Tsuyoshi Akiyama, Toshiki Kinoshita, Hikona Sakai, Yuki Takemura, Hikaru Okuwada, Akira Uritani, Clive Michael

引用次数: 0

Suppression of MHD Effects in Liquid Metals through Solid Insulation Particle Doping 固体绝缘颗粒掺杂抑制液态金属中的MHD效应

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-04-29 DOI: 10.1007/s10894-026-00575-x

Gaoyuan Liu, Junge Li, Xihao Chu, Jingjing Wang, Bing Wang, Bo Wang

{"title":"Suppression of MHD Effects in Liquid Metals through Solid Insulation Particle Doping","authors":"Gaoyuan Liu, Junge Li, Xihao Chu, Jingjing Wang, Bing Wang, Bo Wang","doi":"10.1007/s10894-026-00575-x","DOIUrl":"10.1007/s10894-026-00575-x","url":null,"abstract":"<div><p>Suppressing the magnetohydrodynamic (MHD) effect in the liquid tritium breeder is key to ensuring the safe and stable operation of the tritium breeding blanket in a fusion reactor.To address this issue, this study proposes a novel strategy for regulating the MHD effect by doping with solid insulating particles.Based on the finite element method, a three-dimensional rectangular duct MHD model is constructed, in which solid insulating Al₂O₃ particles are assumed to be uniformly distributed in the liquid lithium-lead alloy and interact with the velocity field and the electromagnetic field.By varying the particle quantity and the applied magnetic field strength, the effects of particles on the velocity field, electric potential distribution, and MHD pressure drop are simulated and analyzed.The results show that the introduction of solid insulating particles significantly optimizes the flow characteristics.Under a magnetic field of 2 T, the velocity reduction after adding 128 alumina particles with a diameter of 5 mm is 24.7%, which is substantially smaller than the 64.7% reduction observed without particles.Meanwhile, the dimensionless MHD pressure drop is reduced by 37.4% upon particle doping. Mechanism analysis reveals that the particle-induced micro-Hall effect is the primary mechanism for MHD suppression.The particle doping strategy proposed in this study provides a new theoretical basis and technical pathway for the optimal design of liquid tritium breeder blankets.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147797083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0