Fusion Engineering and Design最新文献_第8页

Coupled model for liquid lithium plasma facing components 面向组件的液态锂等离子体耦合模型

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-09-03 DOI: 10.1016/j.fusengdes.2024.114651

Andrei Khodak, Eric Emdee, Robert Goldston, Rajesh Maingi

{"title":"Coupled model for liquid lithium plasma facing components","authors":"Andrei Khodak, Eric Emdee, Robert Goldston, Rajesh Maingi","doi":"10.1016/j.fusengdes.2024.114651","DOIUrl":"10.1016/j.fusengdes.2024.114651","url":null,"abstract":"<div><p>Numerical analysis provides the design choice and operating window of liquid metal Plasma Facing Components (PFC) concepts. Coupled analysis of boundary plasma together with the surrounding boundary structures is required. To achieve this goal, PPPL is developing a comprehensive multi-physics model for modeling of PFCs in fusion devices. The model includes the fluid-kinetic code SOLPS-ITER and the flow and heat transfer code CFX from ANSYS. SOLPS-ITER was augmented with a liquid metal boundary condition algorithm, allowing direct two-way coupling of the plasma analysis with the two-dimensional analytical slab flow model which includes heat convection in the liquid metal PFC. The target heat flux resulting from this coupled analysis is used as a boundary condition for detailed 3D Computational Fluid Dynamics (CFD) Magneto Hydro Dynamics (MHD) and heat transfer analysis. A new formulation of MHD equations is introduced in the numerical procedure ensuring current conservation of the discretized equations. Results of the 3D analysis are used for final validation of the coupled model. A PFC design where a porous wall is used to stabilize the liquid metal surface, while MHD drive is used to push the liquid metal flow inside the PFC, will be investigated in the regimes where vapor shielding is created for enhanced volumetric plasma heat dissipation.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114651"},"PeriodicalIF":1.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design and position analysis of 2PUU-2PSS parallel mechanism for auxiliary assembly in DEMO vacuum vessel 用于 DEMO 真空容器辅助组件的 2PUU-2PSS 并联机构的设计和位置分析

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-09-03 DOI: 10.1016/j.fusengdes.2024.114645

Shikun Wen , Shutao Wu , Qian Qi , Huapeng Wu , Yang Yang , Yong Cheng , Aihong Ji

{"title":"Design and position analysis of 2PUU-2PSS parallel mechanism for auxiliary assembly in DEMO vacuum vessel","authors":"Shikun Wen , Shutao Wu , Qian Qi , Huapeng Wu , Yang Yang , Yong Cheng , Aihong Ji","doi":"10.1016/j.fusengdes.2024.114645","DOIUrl":"10.1016/j.fusengdes.2024.114645","url":null,"abstract":"<div><p>This study proposes a 2PUU-2PSS parallel mechanism (PM) designed to meet the high-precision assembly requirements of the DEMO vacuum vessel. The mechanism, featuring four degrees of freedom (3T1R), is capable of moving to the working area with the assistance of a conveying device to perform high-precision cutting and welding operations on the inner walls of the vacuum vessel. Firstly, the number and characteristics of the mechanism's degrees of freedom are analyzed based on screw theory, where the correctness of the design is verified. Secondly, with the constraint of the mechanism's rod length, the forward and inverse kinematics equations are established. The forward kinematics equations are then transformed into unconstrained optimization equations, and a differential evolution algorithm is employed for solving. Furthermore, to enhance the optimization efficiency and robustness of the differential evolution algorithm, a mean-based dual mutation strategy and an individual selection strategy are proposed and integrated into the traditional differential evolution algorithm, forming a Mean-based Dual Mutation Differential Evolution (MDDE) algorithm with strong global search capabilities and convergence rates. To assess the performance of the MDDE algorithm, numerical experiments are conducted using two CEC Benchmarks functions and two mechanical examples. The experimental results demonstrate that the MDDE algorithm consistently outperforms the compared algorithms. Finally, numerical examples are provided to demonstrate the application of the MDDE algorithm in obtaining the forward kinematics solution, including the single-point position and orientation and continuous trajectory, for the 2PUU-2PSS PM, where the correctness of the forward kinematics solution is verified through the application of the inverse kinematics.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114645"},"PeriodicalIF":1.9,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

An analytical thermal model for the optimization of EU DEMO feeder thermal shields 用于优化欧盟 DEMO 送料机隔热罩的热分析模型

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-09-03 DOI: 10.1016/j.fusengdes.2024.114650

Corrado Groth , Andrea Chiappa , Roberto Guarino

引用次数: 0

The impact of stray magnetic fields on the KSTAR NBI performance 杂散磁场对 KSTAR NBI 性能的影响

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-09-02 DOI: 10.1016/j.fusengdes.2024.114646

SeulChan Hong , Geonwoo Baek , Jae Young Jang , Byungkeun Na , J.H. Jeong , C.Y. Lee , Min Park , Jaewook Kim , Jong-Gu Kwak , Yong-Su Na

{"title":"The impact of stray magnetic fields on the KSTAR NBI performance","authors":"SeulChan Hong , Geonwoo Baek , Jae Young Jang , Byungkeun Na , J.H. Jeong , C.Y. Lee , Min Park , Jaewook Kim , Jong-Gu Kwak , Yong-Su Na","doi":"10.1016/j.fusengdes.2024.114646","DOIUrl":"10.1016/j.fusengdes.2024.114646","url":null,"abstract":"<div><p>The stray magnetic fields generated by a plasma discharge impact the performance of neutral beam injection (NBI), leading to a decline in the plasma performance of the Korea Superconducting Tokamak Advanced Research (KSTAR). To evaluate the impact of the stray magnetic field on the NBI performance, a Monte Carlo simulation tool was developed. The simulation tool integrates the stray magnetic fields, NBI beam line components, and charge exchange processes comprehensively, allowing for quantitative analysis of the NBI performance reduction due to the stray magnetic fields. The high pressure of the beam chamber, along with the stray magnetic fields, causes a significant reduction of the beam power, emphasizing the need to maintain low vacuum pressure. However, the stray magnetic field does not significantly affect the injection angle of the beam particles reaching the tokamak. Predictive integrated simulations show that the decrease in beam performance due to stray magnetic fields can affect a degradation in plasma performance during long pulse discharge in KSTAR.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114646"},"PeriodicalIF":1.9,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Development of a PXIe-based data acquisition and control system for hydrogen pellet injection system 为氢粒喷射系统开发基于 PXIe 的数据采集和控制系统

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-31 DOI: 10.1016/j.fusengdes.2024.114641

M. Banaudha , J. Mishra , P. Panchal , S. Mukherjee , P. Nayak , V. Gupta , H. Agravat , R. Gangradey

{"title":"Development of a PXIe-based data acquisition and control system for hydrogen pellet injection system","authors":"M. Banaudha , J. Mishra , P. Panchal , S. Mukherjee , P. Nayak , V. Gupta , H. Agravat , R. Gangradey","doi":"10.1016/j.fusengdes.2024.114641","DOIUrl":"10.1016/j.fusengdes.2024.114641","url":null,"abstract":"<div><p>A data acquisition and control (DAC) system has been developed for the solid hydrogen pellet injection system. This injector is a gas gun type injector, where solid hydrogen pellet ice is formed using a closed cycle cryocooler, and high-pressure helium gas or a pneumatic punch is used to dislodge the pellet. The DAC system is based on National Instrument's embedded controller NI PXIe-8133, along with associated I/O DAC cards and the LabVIEW application. A graphical user interface (GUI) developed using LabVIEW software allows users to remotely control the pellet formation and injection process. The data is stored locally on a desktop computer or in cloud storage for further analysis. The images of the injected pellet were obtained by using a Phantom V-1210 high-speed camera at 100-Killo FPS, which reveals the size and speed of the pellet. The developed DAC system provides the flexibility needed to operate the injector remotely during the plasma discharge in a tokamak environment. The injector setup system has been successfully tested in a test bench operation, and it will be integrated with the ADITYA-U tokamak.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114641"},"PeriodicalIF":1.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Determining aqueous deuterium detection limits via infrared spectroscopy to understand its capabilities for real-time monitoring of tritiated water 通过红外光谱测定水体氘检测限，了解其对三价水的实时监测能力

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-31 DOI: 10.1016/j.fusengdes.2024.114647

A. Cooper , T. Stokes , M. Irwin , E. Dixon , A. Wilson , G. Cefali

{"title":"Determining aqueous deuterium detection limits via infrared spectroscopy to understand its capabilities for real-time monitoring of tritiated water","authors":"A. Cooper , T. Stokes , M. Irwin , E. Dixon , A. Wilson , G. Cefali","doi":"10.1016/j.fusengdes.2024.114647","DOIUrl":"10.1016/j.fusengdes.2024.114647","url":null,"abstract":"<div><p>Tritiated water will be present in many demonstrator class fusion devices in a wide array of locations and concentrations. Accurate and fast measurement will be a key requirement to ensure suitable process monitoring, safety assurance and tritium tracking is in place. This work quantifies the deuterium detection limits achievable using a benchtop transmission Fourier transform infrared (FTIR) instrument and an industrialised attenuated total reflectance (ATR)-FTIR instrument to understand the capabilities of these techniques for real-time monitoring of aqueous tritium. Deuterium limits of detection of 4.62 × 10<sup>-5</sup> mol mL<sup>-1</sup> and 1.07 × 10<sup>-3</sup> mol mL<sup>-1</sup> were demonstrated with measurement times of 10s for the transmission FTIR and ATR-FTIR, respectively. These instruments are considered viable for the measurement of high concentration tritiated water and have many potential benefits associated with their deployment.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114647"},"PeriodicalIF":1.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0920379624004988/pdfft?md5=0db7a501d3bbfd7fa963e83fc8fb5edd&pid=1-s2.0-S0920379624004988-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

EAST plant data storage system based on IoTDB time series database 基于 IoTDB 时间序列数据库的 EAST 工厂数据存储系统

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-30 DOI: 10.1016/j.fusengdes.2024.114648

Guang Yang , Feng Wang , Dixin Fan

{"title":"EAST plant data storage system based on IoTDB time series database","authors":"Guang Yang , Feng Wang , Dixin Fan","doi":"10.1016/j.fusengdes.2024.114648","DOIUrl":"10.1016/j.fusengdes.2024.114648","url":null,"abstract":"<div><p>EAST (Experimental Advanced Superconducting Tokamak) has been in operation since 2006. With increasing operation time, the volume of plant data stored in MySQL has steadily grown to several billion rows. The current storage architecture centered around the relational database has shown poor performance when facing massive time series data, so it is crucial to adopt TSDB (Time Series Database) for storing plant data. In initial testing, IoTDB demonstrated a performance advantage of at least 2 times over other TSDBs in terms of both write throughput and large-scale queries for plant data management. However, as the inflexible underlying infrastructure of EAST, the plant database cannot be easily modified directly. To remedy this problem, we propose a MySQL-IoTDB Hierarchical Mechanism (MIHM). Specifically, we utilized a MySQL master–slave to IoTDB cluster design to seamlessly transfer the performance burden from relational database to TSDB IoTDB. Extensive tests on the EAST plant data demonstrate that MIHM-based plant data storage system has increased the write throughput by 20 times and the large-scale data querying speed by 100 times compared to previous systems.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114648"},"PeriodicalIF":1.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Simulation and experiment of CRAFT NNBI cryopump CRAFT NNBI 低温泵的模拟和实验

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-30 DOI: 10.1016/j.fusengdes.2024.114637

Qianxu Wang , Yuanlai Xie , Huihui Hong , Yang Zhu , Fang Wang , Yao Jiang , Jianjie Yao

{"title":"Simulation and experiment of CRAFT NNBI cryopump","authors":"Qianxu Wang , Yuanlai Xie , Huihui Hong , Yang Zhu , Fang Wang , Yao Jiang , Jianjie Yao","doi":"10.1016/j.fusengdes.2024.114637","DOIUrl":"10.1016/j.fusengdes.2024.114637","url":null,"abstract":"<div><p>The cryogenic vacuum system is an important subsystem of Comprehensive Research Facility for Fusion Technology Negative Neutral Beam Injector, which provides vacuum environment support for various experiments related to the beam generation and transport process. In the paper, a simulation and experimental study of the Comprehensive Research Facility for Fusion Reactor Negative Neutral Beam Injector (CRAFT NNBI) cryopump performance has been carried out. The Beam Line Vessel (BLV) and its components are modeled by Solidworks, the pressure distribution, gas molecular velocity distribution and adsorption uniformity of the crysorption pump in the BLV are analyzed by simulation using the Molflow software, at the same time, the performance of the south cryopump is tested experimentally using in-situ measurement method. The simulation results show that the average pressure near the Neutralizer is 8.5*10<sup>-3</sup> Pa, the average pressure near the Electrical Residual Ion Dump (ERID) is 8*10<sup>-3</sup> Pa, and the average pressure near the Calorimeter is 9*10<sup>-3</sup> Pa. The adsorption percentage fluctuates around 12%, which indicates that single structure plays the function of adsorption efficiently, the theoretical pumping speed of the south cryopump on H2 was calculated to be 7.34*10<sup>5</sup> L/s, total theoretical pumping speed of two cryopumps can reach 3.67*10<sup>6</sup> L/s. The experimental results showed that when the south cryopump was operation, the pressures near the Neutralizer were 2.8*10<sup>-2</sup> Pa, the pressures near the ERID were 2.7*10<sup>-2</sup> Pa, and the pressures near the Calorimeter were 7*10<sup>-3</sup> Pa, the actual pumping speed of the south cryopump on H2 was 6.37*10<sup>5</sup> L/s, total actual pumping speed of two cryopumps can reach 3.1*10<sup>6</sup> L/s.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114637"},"PeriodicalIF":1.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

New high-field side magnetic probe array system for three-dimensional magnetic fluctuation measurements on EAST 用于 EAST 三维磁波动测量的新型高场侧磁探针阵列系统

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-29 DOI: 10.1016/j.fusengdes.2024.114636

H. Lan , T.H. Shi , N. Yan , X.Q. Li , S. Li , R. Chen , M.Y. Duan , L.N. Liu , M. Chen , L.X. Chen , D.L. Chen , B. Shen , Y. Wang , Z.H. Xu , Z.K. Lu , L.M. Shao , Y.Y. Zheng , Z. Yuan , L.Q. Xu , G.H. Hu , G.S. Xu

{"title":"New high-field side magnetic probe array system for three-dimensional magnetic fluctuation measurements on EAST","authors":"H. Lan , T.H. Shi , N. Yan , X.Q. Li , S. Li , R. Chen , M.Y. Duan , L.N. Liu , M. Chen , L.X. Chen , D.L. Chen , B. Shen , Y. Wang , Z.H. Xu , Z.K. Lu , L.M. Shao , Y.Y. Zheng , Z. Yuan , L.Q. Xu , G.H. Hu , G.S. Xu","doi":"10.1016/j.fusengdes.2024.114636","DOIUrl":"10.1016/j.fusengdes.2024.114636","url":null,"abstract":"<div><p>To better study the magnetic fluctuations in the high-field side of EAST tokamak, a new high-field side magnetic probe array (HFS-MPA) has been developed on EAST recently. The HFS-MPA consists of 12 identical three-dimensional (3D) magnetic probes, which are mounted on the HFS wall with carefully designed arrangement. The HFS-MPA magnetic probes bring additional toroidal magnetic fluctuation measurements compared with the HFS regular magnetic probes which can only provide poloidal and radial magnetic fluctuation measurements. The upper limits of frequency and toroidal mode number (n) measurements of the magnetic fluctuations have been improved by comparing HFS-MPA with the HFS regular magnetic probes, i.e., 650 kHz vs 100 kHz and <em>n</em> = 23 vs <em>n</em> = 1. In developing the HFS-MPA diagnostic system, many practical challenges have been overcome and many special designs have been developed. These will be mentioned in the main subsystem description of the HFS-MPA diagnostic in this paper, which might be useful for developing new magnetic probe diagnostics in the future on EAST or other magnetically confined fusion devices. The calibration of the effective area and frequency response of the HFS-MPA is also described. The preliminary application in studying the frequency and propagation characteristics of the magnetic fluctuations with HFS-MPA compared with EAST regular magnetic probes shows that the HFS-MPA is well developed for plasma physics studies.</p></div>","PeriodicalId":55133,"journal":{"name":"Fusion Engineering and Design","volume":"207 ","pages":"Article 114636"},"PeriodicalIF":1.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Catalytic decomposition of NH3 as a by-product of magnetically confined nuclear fusion 催化分解 NH3 作为磁约束核聚变的副产品

IF 1.9 3区工程技术

Fusion Engineering and Design Pub Date : 2024-08-28 DOI: 10.1016/j.fusengdes.2024.114642

Jennifer Naglic, Sarah Stofik, Rahat Javaid, Jochen Lauterbach

引用次数: 0