The Shanghai high-repetition-rate X-ray free-electron laser and extreme light facility(SHINE)operates at a maximum repetition rate of 1 MHz.Kicker magnets are key components that distribute electron bunches into three...The Shanghai high-repetition-rate X-ray free-electron laser and extreme light facility(SHINE)operates at a maximum repetition rate of 1 MHz.Kicker magnets are key components that distribute electron bunches into three different undulator lines in a bunch-by-bunch mode.The kicker field width must be less than the time interval between bunches.A lumpedinductance kicker prototype was developed using a vacuum chamber with a single-turn coil.The full magnetic field strength was 0.005 T.This paper presents the requirements,design considerations,design parameters,magnetic field calculations,and measurements of the kicker magnets.The relevant experimental results are also presented.The pulse width of the magnetic field was approximately 600 ns,and the maximum operation repetition rate was 1 MHz.The developed kicker satisfies the requirements for the SHINE project.Finally,numerous recommendations for the future optimization of kicker magnets are provided.展开更多
There are different layout schemes for 330-500 kV switchyard with one and a half breaker configuration. However, as far as the UHV switch-yards for power plants concerned, it is obvious that some layout schemes take u...There are different layout schemes for 330-500 kV switchyard with one and a half breaker configuration. However, as far as the UHV switch-yards for power plants concerned, it is obvious that some layout schemes take up too much area and some others are not compatible with the general layout of power plants. In order to overcome the above problems, a new aligned switchyard layout scheme, i. e., all circuit breakers and disconnecting switches are aligned in one row is discussed in this paper.展开更多
变电构架人字形柱连接节点的构造和受力比较复杂,是构架结构的关键部位之一。结合某500 k V输变电工程,对构架节点受力性能进行了原型试验研究。结果表明,在正常设计工况下,构架节点处于弹性工作状态,具有较大的安全裕度。超加载至2.5...变电构架人字形柱连接节点的构造和受力比较复杂,是构架结构的关键部位之一。结合某500 k V输变电工程,对构架节点受力性能进行了原型试验研究。结果表明,在正常设计工况下,构架节点处于弹性工作状态,具有较大的安全裕度。超加载至2.5倍设计荷载时,构架节点仍未出现整体破坏,仅在非节点区发生局部屈曲,法兰处螺栓基本未出现滑移和松动,焊缝处无明显裂纹,构架节点柱头顶板和底板应变较小。研究成果为进一步进行构架节点优化设计提供了参考。展开更多
基金This work was supported by the Shanghai Municipal Science and Technology Major Project(No.2017SHZDZX02)the National Natural Science Foundation of China(No.12005282)+1 种基金the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2021283)the Shanghai Pilot Program for Basic Research—Chinese Academy of Science,Shanghai Branch(JCYJSHFY-2021-010).
文摘The Shanghai high-repetition-rate X-ray free-electron laser and extreme light facility(SHINE)operates at a maximum repetition rate of 1 MHz.Kicker magnets are key components that distribute electron bunches into three different undulator lines in a bunch-by-bunch mode.The kicker field width must be less than the time interval between bunches.A lumpedinductance kicker prototype was developed using a vacuum chamber with a single-turn coil.The full magnetic field strength was 0.005 T.This paper presents the requirements,design considerations,design parameters,magnetic field calculations,and measurements of the kicker magnets.The relevant experimental results are also presented.The pulse width of the magnetic field was approximately 600 ns,and the maximum operation repetition rate was 1 MHz.The developed kicker satisfies the requirements for the SHINE project.Finally,numerous recommendations for the future optimization of kicker magnets are provided.
文摘There are different layout schemes for 330-500 kV switchyard with one and a half breaker configuration. However, as far as the UHV switch-yards for power plants concerned, it is obvious that some layout schemes take up too much area and some others are not compatible with the general layout of power plants. In order to overcome the above problems, a new aligned switchyard layout scheme, i. e., all circuit breakers and disconnecting switches are aligned in one row is discussed in this paper.
文摘变电构架人字形柱连接节点的构造和受力比较复杂,是构架结构的关键部位之一。结合某500 k V输变电工程,对构架节点受力性能进行了原型试验研究。结果表明,在正常设计工况下,构架节点处于弹性工作状态,具有较大的安全裕度。超加载至2.5倍设计荷载时,构架节点仍未出现整体破坏,仅在非节点区发生局部屈曲,法兰处螺栓基本未出现滑移和松动,焊缝处无明显裂纹,构架节点柱头顶板和底板应变较小。研究成果为进一步进行构架节点优化设计提供了参考。
