Journal of Fusion Energy最新文献_第4页

Prediction of the Linear Growth Rate of Tokamak Sawtooth Mode Based on Machine Learning and Physical Models 基于机器学习和物理模型的托卡马克锯齿模式线性增长率预测

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-01-07 DOI: 10.1007/s10894-025-00543-x

Peijie Zhang, Hongwei Ning, Jinhong Yang, Zhenzhen Ren, Sheng Liu, Jun Kuang, YiQing Wang, Weihua Wang

{"title":"Prediction of the Linear Growth Rate of Tokamak Sawtooth Mode Based on Machine Learning and Physical Models","authors":"Peijie Zhang, Hongwei Ning, Jinhong Yang, Zhenzhen Ren, Sheng Liu, Jun Kuang, YiQing Wang, Weihua Wang","doi":"10.1007/s10894-025-00543-x","DOIUrl":"10.1007/s10894-025-00543-x","url":null,"abstract":"<div><p>High-confinement tokamak plasmas typically exhibit characteristics such as a small aspect ratio, large elongation, and significant triangularity configuration, with the core plasma often experiencing sawtooth mode. Experimental and simulation studies have shown that the linear stability of sawtooth mode is related to the aspect ratio, triangularity, and elongation. When numerically investigating the relationship between sawtooth mode and plasma configurations, the broad parameter space and the large number of parameter combinations require substantial computational time. Therefore, this paper builds upon previous numerical simulations of the sawtooth mode instability physical model (CLT) to construct a database containing plasma configurations and their corresponding sawtooth mode growth rates. We trained three machine learning methods—KNN Random Forest and SVR—to rapidly predict the growth rates of sawtooth mode for plasma configurations across a wide parameter domain. Experiments demonstrate that the Random Forest model achieves an R² of 99.45%, while the SVR and KNN models achieve R² values of 90.38% and 97.62%, respectively. The trained models exhibit sufficient generalization capabilities. By comprehensively comparing the predictive performance of the models, the Random Forest model, which aligns best with the simulation data, was selected for prediction. The relative error between the predicted and actual values does not exceed 2%, indicating reliable prediction performance for the growth rate of sawtooth mode.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145930419","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

Semi-Empirical Formulae for Triton Emission at 14-15 MeV Neutrons 中子在14- 15mev时Triton发射的半经验公式

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-01-03 DOI: 10.1007/s10894-025-00541-z

Asma Ghezal, Samra Nehaoua, Nouri Benaidja

引用次数: 0

ECE Imaging System in LHD LHD中的ECE成像系统

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-01-03 DOI: 10.1007/s10894-025-00544-w

Daiki Nishimura, Tokihiko Tokuzawa, Daisuke Kuwahara, Tatsuhiro Nasu

引用次数: 0

Parametric Study of Helicon Wave Current Drive in NCST NCST螺旋波电流驱动的参数化研究

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2026-01-03 DOI: 10.1007/s10894-025-00545-9

J. Y. Gao, X. C. Chen, X. F. Wu, S. Q. Liu

{"title":"Parametric Study of Helicon Wave Current Drive in NCST","authors":"J. Y. Gao, X. C. Chen, X. F. Wu, S. Q. Liu","doi":"10.1007/s10894-025-00545-9","DOIUrl":"10.1007/s10894-025-00545-9","url":null,"abstract":"<div><p>Helicon waves (HW) are fast magnetosonic waves that can efficiently drive off-axis plasma current in tokamak plasmas through electron Landau damping (ELD) and transit-time magnetic pumping (TTMP) effect. Simulation of helicon wave current drive (HCD) were conducted for the purpose of increasing the discharge current of the NCST, combined with theoretical analysis of wave absorption based on the dispersion relation. Key findings are as follows: (1) When the wave frequency f > 40 MHz, ELD becomes the dominant absorption mechanism for HW in NCST, which is confirmed by the significant increase in the Landau damping term with frequency (Fig. 1). (2) At a frequency of approximately 65 MHz, HCD effectively supplements the bootstrap current for the NCST scenario. (3) Under the optimal parameter combination (<span>({n_parallel }= - 3.8)</span>, <span>(beta ={10^ circ })</span>), the maximum current drive efficiency reaches 136 kA/MW. These results clarify the parameter range for efficient HCD, validate HCD as a feasible non-inductive current drive solution for compact spherical tokamaks, and thereby provide critical theoretical guidance for the design and construction of NCST’s helicon system.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"45 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145887132","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

Effect of Nuclear Elastic Scattering on the Fusion Reaction Rate in the LHD Plasmas 核弹性散射对LHD等离子体中聚变反应速率的影响

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-29 DOI: 10.1007/s10894-025-00540-0

Hideaki Matsuura, Shinji Wakisaka, Takahito Fukuda, Kunihiro Ogawa, Mitsutaka Isobe, Yasuko Kawamoto

引用次数: 0

Assessment of SPND Signal in IFMIF-DONES using a Monte Carlo Modelling 利用蒙特卡罗模型评估IFMIF-DONES中的SPND信号

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-18 DOI: 10.1007/s10894-025-00542-y

Irene Álvarez, Juan Alejandro de la Torre, Marta Anguiano, Fernando Mota, Concepción Oliver, Axel Klix, Yuefeng Qiu, Dieter Leichtle, Frederik Arbeiter, Santiago Becerril

{"title":"Assessment of SPND Signal in IFMIF-DONES using a Monte Carlo Modelling","authors":"Irene Álvarez, Juan Alejandro de la Torre, Marta Anguiano, Fernando Mota, Concepción Oliver, Axel Klix, Yuefeng Qiu, Dieter Leichtle, Frederik Arbeiter, Santiago Becerril","doi":"10.1007/s10894-025-00542-y","DOIUrl":"10.1007/s10894-025-00542-y","url":null,"abstract":"<div><p>IFMIF-DONES (International Fusion Materials Irradiation Facility-DEMO Oriented Neutron Source) is a key facility for the study and analysis of the materials properties exposed to irradiation conditions characterised by a high neutron flux with high energies up to 55 MeV. These irradiation conditions are expected by the future DEMOnstration fusion power plant (DEMO). Within IFMIF-DONES, the irradiation modules which host the specimens material are placed. Therefore, real-time monitoring of the neutron flux is essential to detect and correct any deviations, ensuring continuous and uniform irradiation. Among the diagnostics taken into account, the Self-Powered Neutron Detector (SPND) appears to offer strong physical characteristics in such an environment. However, they have so far only been used in fission reactors. In this work, a theoretical study has been carried out to analyse the signals that could be measured with these diagnostics.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"44 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-025-00542-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145778603","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

Recipe of Helium Neutral Beam Injection for Studying Helium Transport in LHD 用于LHD中氦输运研究的氦中性束注入配方

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-09 DOI: 10.1007/s10894-025-00539-7

Yutaka Fujiwara, Kenichi Nagaoka, Gen Motojima, Hiroyuki Yamaguchi, Mamoru Sato, Naoyuki Suzuki, Hiromi Kato, Ryuichi Sakamoto, Daisuke Nagata, Shuji Kamio, Masaki Osakabe, Katsuyoshi Tsumori, Haruhisa Nakano, Mikiro Yoshinuma, Tatsuya Kobayashi, Katsumi Ida

{"title":"Recipe of Helium Neutral Beam Injection for Studying Helium Transport in LHD","authors":"Yutaka Fujiwara, Kenichi Nagaoka, Gen Motojima, Hiroyuki Yamaguchi, Mamoru Sato, Naoyuki Suzuki, Hiromi Kato, Ryuichi Sakamoto, Daisuke Nagata, Shuji Kamio, Masaki Osakabe, Katsuyoshi Tsumori, Haruhisa Nakano, Mikiro Yoshinuma, Tatsuya Kobayashi, Katsumi Ida","doi":"10.1007/s10894-025-00539-7","DOIUrl":"10.1007/s10894-025-00539-7","url":null,"abstract":"<div>\u0000 \u0000 <p>To advance the understanding of helium transport physics, helium neutral beam (He-NB) experiments were initiated in the Large Helical Device (LHD) during the FY2021 experimental campaign. To facilitate these investigations, modifications were implemented in both the impurity exhaust system and the neutral beam (NB) injection system, enabling the use of the helium beam in a typical fusion experimental environment. In the positive-ion-source-based NB system—originally designed for hydrogen and deuterium beams—the gas supply lines were adapted to introduce helium and argon into the ion sources, while argon was injected into the neutralizer cells. These modifications allowed for the injection of a high current and high focused 78 keV He-NB into the plasma. To improve helium exhaust efficiency at main vessel, turbo-molecular pumps were installed, increasing the effective pumping speed by approximately 1.4 times. During He-NB operation, a gradual decrease in the arc current of the NB ion source was observed with each discharge. This effect was attributed to the formation of helium bubbles on the tungsten filament surface, and a recovery method using argon gas discharges was successfully demonstrated. Plasma heating by He-NB injection was confirmed, and both energetic helium ions and bulk helium ions were successfully measured. Their spatial distributions were also observed. These results contribute to a deeper understanding of helium behavior in fusion plasma and offer valuable insights for future helium transport studies.</p>\u0000 </div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"44 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-025-00539-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729902","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

Modeling and Thermal-hydraulics Characteristics Analysis of sCO2/LiPb Dual Function Blanket Auxiliary Cooling System sCO2/LiPb双功能包层辅助冷却系统建模及热工特性分析

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-08 DOI: 10.1007/s10894-025-00537-9

Youyou Tian, Haoyang Liao, Xianbo Wang, Fulong Zhao, Rui Han, Sichao Tan, Ruifeng Tian

{"title":"Modeling and Thermal-hydraulics Characteristics Analysis of sCO2/LiPb Dual Function Blanket Auxiliary Cooling System","authors":"Youyou Tian, Haoyang Liao, Xianbo Wang, Fulong Zhao, Rui Han, Sichao Tan, Ruifeng Tian","doi":"10.1007/s10894-025-00537-9","DOIUrl":"10.1007/s10894-025-00537-9","url":null,"abstract":"<div><p>The supercritical carbon dioxide (sCO<sub>2</sub>) cooled Lithium–Lead (LiPb) dual function blanket is an advanced blanket concept design proposed by Chinese Fusion Engineering and Test Reactor (CFETR), which has the characteristics of high inherent safety and high thermoelectric conversion efficiency. In order to study the operational safety characteristics of the fusion reactor blanket Auxiliary Cooling System (ACS) and ensure the safe and stable operation of the system, this paper establishes a dynamic simulation model of key equipment for the fusion reactor blanket ACS, and develops a system analysis program. Based on the self-programming system program, this paper analyzes the thermal safety effects of various heating powers and flow rates on the sCO<sub>2</sub>/LiPb dual function blanket, and conducts research on the operational safety characteristics of the system under expected shutdown transient events and varying degrees of Unprotected Loss of Heat Sink (ULOHS) accidents. The results indicate that sCO<sub>2</sub> and LiPb can effectively remove plasma radiation heat flux and nuclear thermal power, ensuring the thermal safety of the blanket. When the LiPb mass flow rate is 60% of the rated value, the outlet temperature of LiPb in the breeding zone exceeds its design limit of 1273.15K. When the LiPb flow rate is 30% of the rated value, the temperature of the cooling plate material in the blanket exceeds its design limit of 798.15K. Under expected shutdown operating conditions, the system can effectively export residual heat from the blanket. The ultimate operating condition of ULOHS accident is a 95% loss of sCO<sub>2</sub> flow on the secondary side, and after 3000 s, the LiPb temperature inside the blanket exceeds the limit value. This study can provide technical support for system regulation and operation control.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"44 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729611","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

Implementation and Technical Evaluation of Shot-by-Shot Data Transfer from GAMMA 10/PDX To LHD LABCOM Via SNET 伽玛10/PDX通过SNET向LHD LABCOM逐射数据传输的实现与技术评价

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-06 DOI: 10.1007/s10894-025-00538-8

Masayuki Yoshikawa, Mizuki Sakamoto, Naomichi Ezumi, Junko Kohagura, Mafumi Hirata, Akihiko Sugiyama, Yasunori Washo, Yoriko Shima, Hideya Nakanishi, Masahiko Emoto, Masaki Ohsuna

引用次数: 0

Measurements of Optical Emission from Singly Ionized Er Ions at LHD for Laboratory Assessment of Atomic Data Relevant to Opacity of Kilonovae LHD单电离Er离子的光发射测量，用于实验室评估与千新星不透明度相关的原子数据

IF 2.1 4区工程技术

Journal of Fusion Energy Pub Date : 2025-12-02 DOI: 10.1007/s10894-025-00531-1

Priti, Motoshi Goto, Tetsutaro Oishi, Hiroyuki A. Sakaue, Izumi Murakami, Nobuyuki Nakamura, Hajime Tanuma, Masaomi Tanaka, Gediminas Gaigalas, Daiji Kato

{"title":"Measurements of Optical Emission from Singly Ionized Er Ions at LHD for Laboratory Assessment of Atomic Data Relevant to Opacity of Kilonovae","authors":"Priti, Motoshi Goto, Tetsutaro Oishi, Hiroyuki A. Sakaue, Izumi Murakami, Nobuyuki Nakamura, Hajime Tanuma, Masaomi Tanaka, Gediminas Gaigalas, Daiji Kato","doi":"10.1007/s10894-025-00531-1","DOIUrl":"10.1007/s10894-025-00531-1","url":null,"abstract":"<div><p>The atomic data of heavy elements, especially rare-earth metals, plays a crucial role in enhancing our understanding and interpreting kilonova spectra and underlying astrophysical processes. Among these elements, Erbium (Er) is particularly intriguing because it is important for opacities of the kilonova observed in 2017 (GW170817). In order to assess the atomic data, optical spectra of Er ions were precisely measured in <span>(385-400,hbox {nm})</span> at Large Helical Device (LHD). In the present experiment, Er was injected into the core plasma of LHD through carbon pellets containing Er powders. The electron density and temperature of the Er-contained C pellet ablation cloud were obtained to be <span>(1.6 times 10^{22},hbox {m}^{-3})</span> and 1.4 eV using the Stark broadening of a C II line and the Boltzmann plot of Er II lines, respectively. Transition probabilities of observed Er II lines were assessed using the Boltzmann plot analysis. Recent measurements with laser-induced breakdown spectroscopy (LIBS) of an Er II line at 393.86 nm were confirmed by the present work.</p></div>","PeriodicalId":634,"journal":{"name":"Journal of Fusion Energy","volume":"44 2","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10894-025-00531-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675266","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