针对CFETR(China Fusion Engineering Test Reactor)设计面临的文档管理需求,提出一种基于依赖管理的CFETR文档管理系统。CFETR文档管理系统由基础文档管理模块和设计包管理模块组成。其中,基础文档管理模块用来管理原始的设计文档。考...针对CFETR(China Fusion Engineering Test Reactor)设计面临的文档管理需求,提出一种基于依赖管理的CFETR文档管理系统。CFETR文档管理系统由基础文档管理模块和设计包管理模块组成。其中,基础文档管理模块用来管理原始的设计文档。考虑到原始数据的安全性、稳定性需求,基础文档管理模块基于成熟的商业软件ENOVIA开发。设计包管理模块解决设计文档的依赖问题。基于"设计包"的概念,定义设计包的数据结构,并在数据库系统中实现设计包的持久化存储。开发设计包管理程序,其具备创建、审批、查看和销毁设计包的功能。提出依赖冲突检测算法,能够识别版本依赖冲突和循环依赖冲突。经过部署和测试,该系统能有效地管理文档和设计包依赖关系,从而保障设计工作的自洽性,提高设计效率。展开更多
The microwave reflectometer is a popular non-intrusive plasma density diagnostic instrument on tokamaks that provides centimeter and millisecond level resolution.The ultrashort-pulse reflectometer(USPR)achieves plasma...The microwave reflectometer is a popular non-intrusive plasma density diagnostic instrument on tokamaks that provides centimeter and millisecond level resolution.The ultrashort-pulse reflectometer(USPR)achieves plasma density measurement by emitting a chirped wave containing a broadband signal and measuring the time of flight from different frequency components.A USPR system is currently being built on EAST(Experimental Advanced Superconducting Tokamak)to meet the needs of diagnostic of the pedestal density evolution,such as high-frequency small edge-localized modes.In order to predict the density reconstruction of the EAST USPR system,this work presents a numerical simulation study of the beam propagation of the chirped wave of extraordinary waves(X-mode)in the plasma based on Python.The electron density profile has been successfully reconstructed by the reflection signal interpretation.The small gap between the right-hand cut-off layer and the electron cyclotron resonance layer,due to the low plasma density on the plasma edge,causes unexpected leakage from the transmitting microwave beam to the pedestal and the core region.This kind of‘tunneling’effect will cause the reflected signal to have energy loss in the low-frequency band.The study also discusses the influence of the poloidal magnetic field on the reflected signal.The spatial variation of the poloidal magnetic field will lead to the conversion between extraordinary(X)waves and ordinary(O)waves,which leads to energy loss in the reflected signals.The simulation results show that the‘tunneling’effect and the O-X mode conversion effect have little effect on the EAST USPR system.Therefore,the currently designed transmit power meets the working requirements.展开更多
在德国卡尔斯鲁厄理工学院提出的KALPUREX(Karlsruhe liquid metal based pumping process for fusion reactor exhaust gases)流程中,利用直线型水银扩散泵实现对聚变堆排灰气的连续抽气,从而解决使用捕集式低温泵带来的高氚滞留量问...在德国卡尔斯鲁厄理工学院提出的KALPUREX(Karlsruhe liquid metal based pumping process for fusion reactor exhaust gases)流程中,利用直线型水银扩散泵实现对聚变堆排灰气的连续抽气,从而解决使用捕集式低温泵带来的高氚滞留量问题。为了支持直线型水银扩散泵的设计研究,基于直接模拟蒙特卡洛方法开展了直线型水银扩散泵的抽气性能模拟研究。基于早期实验中的直线型水银扩散泵结构,模拟了空气的抽气速率及水银返流率,并分析了其随压强变化的原因。针对聚变堆排灰气中可能包含的氢(作为氢同位素的代表)、氦、氖、氩等气体,分别模拟了直线型水银扩散泵的抽气性能。模拟得到的不同气体的抽气速率与气体摩尔质量间的关系基本符合理论预测。展开更多
The change in the toroidal rotation of plasma caused by electron cyclotron wave（ECW） injection has been observed in EAST. It is found that the response of the rotation is similar for all possible ECW toroidal inject...The change in the toroidal rotation of plasma caused by electron cyclotron wave（ECW） injection has been observed in EAST. It is found that the response of the rotation is similar for all possible ECW toroidal injection angles. The core toroidal rotation velocity increases in the co-current direction along with a rise in the plasma temperature and stored energy. The profile of the electron temperature, ion temperature and toroidal rotation velocity gradually become peaked.The change in toroidal rotation in the core increases with the ECW injection power. Different behavior is observed when the ECWs are injected into low hybrid current drive（LHCD） target plasmas, where the electron temperature and rotation profile become peaked, while the ion temperature profile flattens after ECW injection, suggesting different transport characteristics in energy and momentum.展开更多
文摘针对CFETR(China Fusion Engineering Test Reactor)设计面临的文档管理需求,提出一种基于依赖管理的CFETR文档管理系统。CFETR文档管理系统由基础文档管理模块和设计包管理模块组成。其中,基础文档管理模块用来管理原始的设计文档。考虑到原始数据的安全性、稳定性需求,基础文档管理模块基于成熟的商业软件ENOVIA开发。设计包管理模块解决设计文档的依赖问题。基于"设计包"的概念,定义设计包的数据结构,并在数据库系统中实现设计包的持久化存储。开发设计包管理程序,其具备创建、审批、查看和销毁设计包的功能。提出依赖冲突检测算法,能够识别版本依赖冲突和循环依赖冲突。经过部署和测试,该系统能有效地管理文档和设计包依赖关系,从而保障设计工作的自洽性,提高设计效率。
基金supported by the National Magnetic Confinement Fusion Energy R&D Program of China(No.2019YFE03030004)National Natural Science Foundation of China(No.12005144)。
文摘The microwave reflectometer is a popular non-intrusive plasma density diagnostic instrument on tokamaks that provides centimeter and millisecond level resolution.The ultrashort-pulse reflectometer(USPR)achieves plasma density measurement by emitting a chirped wave containing a broadband signal and measuring the time of flight from different frequency components.A USPR system is currently being built on EAST(Experimental Advanced Superconducting Tokamak)to meet the needs of diagnostic of the pedestal density evolution,such as high-frequency small edge-localized modes.In order to predict the density reconstruction of the EAST USPR system,this work presents a numerical simulation study of the beam propagation of the chirped wave of extraordinary waves(X-mode)in the plasma based on Python.The electron density profile has been successfully reconstructed by the reflection signal interpretation.The small gap between the right-hand cut-off layer and the electron cyclotron resonance layer,due to the low plasma density on the plasma edge,causes unexpected leakage from the transmitting microwave beam to the pedestal and the core region.This kind of‘tunneling’effect will cause the reflected signal to have energy loss in the low-frequency band.The study also discusses the influence of the poloidal magnetic field on the reflected signal.The spatial variation of the poloidal magnetic field will lead to the conversion between extraordinary(X)waves and ordinary(O)waves,which leads to energy loss in the reflected signals.The simulation results show that the‘tunneling’effect and the O-X mode conversion effect have little effect on the EAST USPR system.Therefore,the currently designed transmit power meets the working requirements.
基金This work was supported by the National Natural Science Foundation of China （No.11274288 and No.11574289）. We thank the Supercomputing Center of USTC for support in performing parallel computations.
文摘在德国卡尔斯鲁厄理工学院提出的KALPUREX(Karlsruhe liquid metal based pumping process for fusion reactor exhaust gases)流程中,利用直线型水银扩散泵实现对聚变堆排灰气的连续抽气,从而解决使用捕集式低温泵带来的高氚滞留量问题。为了支持直线型水银扩散泵的设计研究,基于直接模拟蒙特卡洛方法开展了直线型水银扩散泵的抽气性能模拟研究。基于早期实验中的直线型水银扩散泵结构,模拟了空气的抽气速率及水银返流率,并分析了其随压强变化的原因。针对聚变堆排灰气中可能包含的氢(作为氢同位素的代表)、氦、氖、氩等气体,分别模拟了直线型水银扩散泵的抽气性能。模拟得到的不同气体的抽气速率与气体摩尔质量间的关系基本符合理论预测。
基金supported by the National Magnetic Confinement Fusion Science Program of China (2013GB112004, 2015GB103002)National Natural Science Foundation of China (11305212, 11405212)+1 种基金the MajorProgram of Development Foundation of Hefei Center for Physical Science and Technology (2016FXZY008)the Natural Science Research Key Project of the Education Department of Anhui Province under grant No. KJ2016A434
文摘The change in the toroidal rotation of plasma caused by electron cyclotron wave（ECW） injection has been observed in EAST. It is found that the response of the rotation is similar for all possible ECW toroidal injection angles. The core toroidal rotation velocity increases in the co-current direction along with a rise in the plasma temperature and stored energy. The profile of the electron temperature, ion temperature and toroidal rotation velocity gradually become peaked.The change in toroidal rotation in the core increases with the ECW injection power. Different behavior is observed when the ECWs are injected into low hybrid current drive（LHCD） target plasmas, where the electron temperature and rotation profile become peaked, while the ion temperature profile flattens after ECW injection, suggesting different transport characteristics in energy and momentum.
