Journal of Fusion Energy最新文献_第2页

Development of Charge Exchange Spectroscopy in LHD LHD电荷交换光谱研究进展

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-28 DOI: 10.1007/s10894-026-00594-8

Mikirou Yoshinuma, Katsumi Ida, Tatsuya Kobayashi

引用次数: 0

Spectroscopy Using a Schwob-Fraenkel Grazing Incidence Spectrometer schwo - fraenkel掠入射光谱仪的光谱学研究

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-20 DOI: 10.1007/s10894-026-00585-9

Chihiro Suzuki, Hisamichi Funaba, Naoki Tamura

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An Integrated AHP-SWOT Analysis on the Strategic Transition of Traditional Oil and Gas Companies to Fusion Energy in China 中国传统油气企业向聚变能源战略转型的AHP-SWOT综合分析

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-20 DOI: 10.1007/s10894-026-00593-9

Chao Guo, Ya Yuan, Yongxin Zheng, Bo Wang, Xingang Li

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Plasma Disruption Prediction on the Nanchang Spherical Tokamak: A Comparative Study of Models Based on Sliding Window Statistical Features 南昌球形托卡马克等离子体破坏预测：基于滑动窗口统计特征的模型比较研究

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-11 DOI: 10.1007/s10894-026-00590-y

Li Zhang, Xincheng Xiong, Xiaochang Chen, Sanqiu Liu, Xiaolan Liu

{"title":"Plasma Disruption Prediction on the Nanchang Spherical Tokamak: A Comparative Study of Models Based on Sliding Window Statistical Features","authors":"Li Zhang, Xincheng Xiong, Xiaochang Chen, Sanqiu Liu, Xiaolan Liu","doi":"10.1007/s10894-026-00590-y","DOIUrl":"10.1007/s10894-026-00590-y","url":null,"abstract":"<div><p>Plasma disruption poses a critical challenge to the steady-state operation of tokamaks. Based on 201 discharge shots from the Nanchang Spherical Tokamak (NCST), this study presents a systematic evaluation of disruption prediction models that integrate sliding window statistical features with machine learning. From eight diagnostic signals, local mean and standard deviation within a 5 ms window are extracted to construct a 24-dimensional feature space. Four models—Random Forest, Logistic Regression, Support Vector Machine and LightGBM—are compared under a 20 ms warning window, with hyperparameters optimized via cross-validation and cost-sensitive learning. Results indicate that LightGBM outperforms the others, achieving 96.7% accuracy, 100% recall, and an F1 score of 0.960. Feature importance analysis highlights loop voltage, toroidal magnetic field, and plasma stored energy as the most significant contributors, which aligns with the physical mechanisms of disruptions. This work validates the feasibility of disruption prediction on NCST and provides a model reference for the real-time warning system of the upgraded NCST-U device.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465638","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

Criteria for the economic viability of fusion power plants 核聚变发电厂经济可行性的标准

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-10 DOI: 10.1007/s10894-026-00577-9

D. G. Whyte, A. Lo, R. Bielajew, M. Hancock, R. Moeykens, G. Shaw

{"title":"Criteria for the economic viability of fusion power plants","authors":"D. G. Whyte, A. Lo, R. Bielajew, M. Hancock, R. Moeykens, G. Shaw","doi":"10.1007/s10894-026-00577-9","DOIUrl":"10.1007/s10894-026-00577-9","url":null,"abstract":"<div><p>Commercial fusion energy requires frameworks to assess both the scientific and economic viability of a wide variety of fusion concepts. Inspired by the Lawson criterion’s ability to universally describe fusion energy gain, a generalized framework is developed to determine the economic gain of fusion power plants. The model exploits temporal equilibrium, and engineering and cost parameters normalized to the energy capture surface. The derived criteria for economic gain are therefore independent of the power plant’s absolute power, impartial to the particulars of its fusion technology, and can be applied to any fusion confinement concept. The derivation of the economic gain factor, <span>(mathrm {Q_{econ}})</span>, results in nonlinear equations with ten controlling normalized design parameters ranging from fusion power density and surface component lifetime to energy fluence, price of energy, and component efficiency and cost. These ten controlling parameters are varied over a wide range to provide high-level insights in design, finance and operational tradeoffs that improve the prospects for economically viable fusion energy.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00577-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465256","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

Real-Time Control System for Electron Cyclotron Heating Injection on LHD LHD电子回旋加热注入实时控制系统

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-06 DOI: 10.1007/s10894-026-00588-6

Naoki Kenmochi, Tohru Ii Tsujimura, Yoshinori Mizuno, Masaki Nishiura, Kota Okada, Yasuo Yoshimura, Hiroe Igami, Hiromi Takahashi, Ryoma Yanai, Toshiki Takeuchi, Shin Kubo, Takashi Shimozuma, Sakuji Kobayashi, Satoshi Ito, Hidenori Takubo

{"title":"Real-Time Control System for Electron Cyclotron Heating Injection on LHD","authors":"Naoki Kenmochi, Tohru Ii Tsujimura, Yoshinori Mizuno, Masaki Nishiura, Kota Okada, Yasuo Yoshimura, Hiroe Igami, Hiromi Takahashi, Ryoma Yanai, Toshiki Takeuchi, Shin Kubo, Takashi Shimozuma, Sakuji Kobayashi, Satoshi Ito, Hidenori Takubo","doi":"10.1007/s10894-026-00588-6","DOIUrl":"10.1007/s10894-026-00588-6","url":null,"abstract":"<div><p>Real-time control of electron cyclotron heating (ECH) is critical for optimizing plasma performance and preventing instabilities in advanced fusion devices. We present a comprehensive real-time ECH control system developed on the Large Helical Device (LHD) that enables real-time adjustment of microwave heating in response to evolving plasma conditions. A field-programmable gate array (FPGA) controller actuates the ECH launchers, enabling millisecond-level adjustments of both injection angle and polarization to maximize absorption as plasma density and temperature profiles change. To compute suitable settings rapidly, a generative adversarial network (GAN) model was trained on thousands of past LHD discharges and ray-tracing simulations of ECH to generate control parameters for the deposition position and polarization. In high-density LHD experiments, another machine-learning-based prediction framework enabled the first active avoidance of radiative collapse. The predictor identified an impending collapse about 65 milliseconds in advance, triggering automated ECH power re-targeting and a cutoff of fueling that stabilized the plasma beyond the conventional density limit. These developments demonstrate how real-time ECH control, together with machine-learning-assisted prediction and inference, can sustain stable, high-performance plasmas, highlighting a pathway toward long-duration, steady-state fusion operations.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00588-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465412","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

Review of High-Power Microwave Transmission System for ECH in LHD LHD中用于ECH的大功率微波传输系统综述

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-06 DOI: 10.1007/s10894-026-00586-8

Ryoma Yanai, Shin Kubo, Takashi Shimozuma, Yasuo Yoshimura, Masaki Nishiura, Hiroe Igami, Hiromi Takahashi, Toru Ii Tsujimura, Naoki Kenmochi, Sakuji Kobayashi, Satoshi Ito, Yoshinori Mizuno, Kota Okada, Toshiki Takeuchi, Hidenori Takubo

{"title":"Review of High-Power Microwave Transmission System for ECH in LHD","authors":"Ryoma Yanai, Shin Kubo, Takashi Shimozuma, Yasuo Yoshimura, Masaki Nishiura, Hiroe Igami, Hiromi Takahashi, Toru Ii Tsujimura, Naoki Kenmochi, Sakuji Kobayashi, Satoshi Ito, Yoshinori Mizuno, Kota Okada, Toshiki Takeuchi, Hidenori Takubo","doi":"10.1007/s10894-026-00586-8","DOIUrl":"10.1007/s10894-026-00586-8","url":null,"abstract":"<div><p>Electron cyclotron heating (ECH) is one of the auxiliary heating methods employed in many magnetically confined fusion devices. In the Large Helical Device (LHD), the ECH system - including high-power gyrotrons, transmission lines, and mirror antennas – has played an important role in improving plasma parameters and realizing a variety of plasma experiments. Highly efficient transmission lines capable of withstanding high-power microwaves are essential to deliver high-power microwaves emitted from gyrotrons. In addition, mirror antennas are important for ensuring that the ECH power is absorbed at the intended location. In this paper, the ECH transmission system, focusing on the associated components used in high-power microwave transmission lines and various mirror antennas prepared for the LHD experiment, is reviewed.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-026-00586-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465526","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

A Method of (in)validating the Projected Levelized Cost of Electricity of Fusion Power 一种验证核聚变发电预计平准化电力成本的方法

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-06 DOI: 10.1007/s10894-026-00592-w

Adam Jackson

{"title":"A Method of (in)validating the Projected Levelized Cost of Electricity of Fusion Power","authors":"Adam Jackson","doi":"10.1007/s10894-026-00592-w","DOIUrl":"10.1007/s10894-026-00592-w","url":null,"abstract":"<div><p>Reliable predictions of the cost of electricity from fusion power plants are fundamental to making sound investment decisions and efficiently allocating resources. Yet, without any detailed designs for fusion power plants, let alone any operational experience, how can we be sure that the projected costs of electricity that inform these decisions are achievable? Rather than trying to project the levelized cost of electricity (LCOE), here we recast the problem and instead work backwards from an assumed LCOE to calculate the implied cost of fusion hardware. In so doing it is possible to invalidate some claimed LCOE projections. Furthermore, this approach helps to elucidate a fundamental shortcoming of fusion power plant schemes that rely on a thermodynamic cycle for power generation: their low <i>net</i> thermal efficiency. The low net thermal efficiency, caused by the power plant itself being a major consumer of electricity, results in a relatively high cost of electricity. The low net thermal efficiency also implies that, on a per megawatt hour basis, cooling water demand from fusion thermal power plants will be significantly higher than for conventional thermal power plants. For fusion power to be widely adopted it will need to be economical. The economic implications of design decisions need to be widely understood early, lest ultimately uneconomical paths are followed. The easy-to-use methodology described herein can help researchers, even those unfamiliar with financial jargon or concepts, to understand how their design decisions may affect the financial viability of fusion power plant concepts.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465529","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

Experimental Data Management System for Long-Term Fusion Experiments 长期聚变实验数据管理系统

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-03 DOI: 10.1007/s10894-026-00591-x

Masahiko Emoto, Hideya Nakanishi, Masanobu Yoshida, Ryuichi Sakamoto

引用次数: 0

STEP Fusion: Overview of the Concept Design for the Spherical Tokamak for Energy Production and Lessons Learnt STEP Fusion：用于能源生产的球形托卡马克概念设计概述及经验教训

IF 2.3 4区工程技术

Journal of Fusion Energy Pub Date : 2026-07-01 DOI: 10.1007/s10894-026-00589-5

Stuart I. Muldrew, Jonathan Keep, Chris Waldon

{"title":"STEP Fusion: Overview of the Concept Design for the Spherical Tokamak for Energy Production and Lessons Learnt","authors":"Stuart I. Muldrew, Jonathan Keep, Chris Waldon","doi":"10.1007/s10894-026-00589-5","DOIUrl":"10.1007/s10894-026-00589-5","url":null,"abstract":"<div><p>The STEP Programme began in 2019 with the mission to deliver a UK prototype fusion energy plant, targeting 2040, and a path to commercial viability of fusion. The STEP Prototype Plant (SPP) aims to demonstrate power plant characteristics by producing at least <span>(100,mathrm {MW_e})</span> net electrical output, being fuel self-sufficient, demonstrating high grade heat production, and a route to commercial availability. In this paper we give an overview of the concept design stage and discuss lessons learnt that are applicable to wider fusion power plant design. Concepts were initially generated using a combination of systems and equilibrium codes, that gave staring points for more detailed study and evaluation. From 69 different concepts explored, a down-selection was made to the SPP-1 baseline design. Further development identified challenges around the lifetime of the centre column magnet and the realisation of the blanket. This led to a pivot to the new SPP-2 design, increasing the major radius from <span>(3.6,textrm{m})</span> to <span>(4.275,textrm{m})</span> to increase the centre column lifetime from <span>(0.22,textrm{FPY})</span> (Full Power Years) to <span>(0.6,textrm{FPY})</span>, and changing from liquid lithium to a solid lithium oxide breeder blanket. The STEP programme will now look to increase the design definition and confidence as it moves to preliminary design.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380475","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