共查询到18条相似文献,搜索用时 78 毫秒
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束流轨道稳定性是同步辐射光源的重要性能指标.储存环校正铁电源控制系统是进行束流轨道校正的重要前提.本文描述了该系统硬件结构、软件设计及调试结果.运行结果表明,改造后的合肥光源储存环校正铁电源控制系统很好地满足了轨道稳定性对其的要求. 相似文献
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A fast orbit feedback system is designed at SSRF to suppress beam orbit disturbance within sub-micron in the bandwidth up to 100 Hz.The SVD (Singular value decomposition) algorithm is applied to calculate the inverse response matrix in global orbit correction.The number of singular eigenvalues will influence orbit noise suppression and corrector strengths.The method to choose singular eigenvalue rejection threshold is studied in this paper,and the simulation and experiment results are also presented. 相似文献
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本文分析了H 1NF仿星器的磁场线圈组成与分布特征,研究了其在标准运行模式下的磁场位形特点,并模拟计算出高能量离子在该标准磁场位形中的典型运动轨道。基于H 1NF仿星器标准磁场位形的磁轴位置和磁面沿环向角的变化规律,以磁轴为旋转轴,按照旋转规律将不同环向角的极向截面旋转后得到一种旋转坐标系下的等效标定极向截面,并将高能量离子的三维运动轨道投影到这种等效标定极向截面上,从而可更加清晰地显示出高能量离子在该磁场位形中的运动轨道特征。结果表明,H 1NF仿星器中的通行粒子和捕获粒子轨道特征均与一般托卡马克中的相应粒子轨道特征相似,但H 1NF仿星器中的通行粒子轨道在等效标定极向截面上绕几圈后才闭合,H 1NF仿星器中捕获粒子的香蕉轨道没有闭合,且轨道逐渐向磁面外侧漂移,最终可能导致粒子损失。 相似文献
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Takashi MAEKAWA Tomokazu YOSHINAGA Hitoshi TANAKA Masaki UCHIDA Fumitake WATANABE 《等离子体科学和技术》2011,13(3):342-346
Electron orbits under the external vertical field (BV) and the self poloidal field of the toroidal plasma current in a toroidal geometry are investigated by using analytic model fields in order to search for the conditions of occurence of appropriate confinement asymmetry of fast electrons along the field lines. This asymmetry e±ciently and quickly generates a toroidal current, which may close the field lines in ECH-started plasmas. It is analytically shown that the characteristics of confinement asymmetry depend on the product of the major radius and the strength of the external vertical field. The results suggest that in large devices BV should be lowered and also some artificial means to speed up the pitch angle scattering for the fast electrons at a higher energy range are beneficial to generate the toroidal current in order to close the filed lines. 相似文献
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We provide correlated observations of enhanced dayside whistler-mode waves and energetic electron acceleration collected by the CLUSTER and GOES satellites during the 23~24 September 2001 storm.Energetic(>0.6 MeV) electron fluxes are found to increase significantly during the recovery phase and the main phase,by a factor of ~50 higher than the prestorm level.These high electron fluxes occur when strong dayside whistler-mode waves are present.Two-dimensional(2D) numerical simulations are carried out and the results demonstrate that the dayside whistler-mode wave can contribute to such enhancements in electron flux within 24 h,consistent with the observation. 相似文献
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GAO Zhe 《等离子体科学和技术》2011,13(1):15-20
Analytical theories of the geodesic acoustic mode (GAM) are reviewed in the small- and large-orbit drift width limits, respectively. Different physics pictures in these two limits are displayed. As an example, these two analytical methods are employed to investigate the plasma shaping effect on the frequency and collisionless damping rate of the GAM. 相似文献
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《中国原子能科学研究院年报(英文版)》2016,(0)
正Betatron is an accelerator device that utilizes electromagnetic induction to accelerate electrons.Its basic principle is to use the alternating magnetic flux to produce a spiral electric field in its surrounding space,and use this electric field to accelerate the electrons to obtain energy.Compared with other kinds of electronic accelerators, 相似文献