用于激光等离子体中脉冲强磁场产生的电感耦合线圈  

Optimization of pulsed intense magnetic field device for laser plasma experiment via inductively coupled coil

作　　者：赵佳羿 胡鹏[1] 王雨林 王金灿 唐桧波 胡广月[1,2] Zhao Jia-Yi;Hu Peng;Wang Yu-Lin;Wang Jin-Can;Tang Hui-Bo;Hu Guang-Yue(CAS Key Laboratory of Geospace Environment,Department of Engineering and Applied Physics,University of Science and Technology of China,Hefei,Anhui 230026,China;CAS Center for Excellence in Ultra-intense Laser Science(CEULS),Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学技术大学工程与应用物理系,中国科学院近地空间环境重点实验室,合肥230026 [2]中国科学院上海光学精密机械研究所,中国科学院超强激光科学卓越创新中心,上海201800

出　　处：《物理学报》2021年第16期191-197,共7页Acta Physica Sinica

基　　金：中国科学院战略先导专项项目(批准号:XDB16000000);国家自然科学基金(批准号:11775223,11375197,11605200,11275202);中央高校基本科研业务费专项资金;强场激光物理国家重点实验室开放基金资助的课题。

摘　　要：脉冲强磁场装置是磁化激光等离子体实验的核心设备.本文研制了一种用于优化脉冲强磁场设备的电感耦合线圈,相对于单匝磁场线圈可以进一步提高磁场强度.通过实验和模拟研究了电感耦合线圈的初级螺线管匝数和直径对磁场强度的影响,发现对于2.4μF电容的放电系统,电感耦合线圈的初级螺线管在35匝、35 mm直径时,可以在5 mm内径的次级磁场线圈中获得最高的峰值磁场强度,是相同尺寸单匝磁场线圈产生磁场强度的3.6倍.在充电电压20 kV时,峰值磁场强度达到19 T,使用铍铜材料的电感耦合线圈克服强磁场中线圈炸裂问题,在35 kV的充电电压下得到了33 T的峰值磁场强度.这种新方法产生了更强的磁场、降低了对回路电感的要求、提升了实验排布的灵活性,为研究强磁场下的激光等离子体行为创造了条件.Magnetized laser plasma has attracted a lot of attention in recent years especially in magnetized inertial confinement fusion,laboratory astrophysics,and industrial application.Pulsed intense magnetic field device is the core equipment of magnetized laser plasma experiment.Here in this work,an inductively coupled coil is developed to optimize the pulsed intense magnetic field device.The primary coil of a multi-turn solenoid is used instead of a single-turn coil.Then the energy of the solenoid is delivered to the secondary coil via inductively coupled transformer,which increases the current density markedly.The current generates a stronger magnetic field in the single-turn magnetic field coil.The influence of the diameter and the number of turns of the primary solenoid of the inductively coupled coil on the magnetic field are explored in experiment and simulation.It is found that for a discharge system of 2.4μF capacitance,the optimized parameters of the primary solenoid are 35 turns and 35 mm diameter.The optimized magnetic field is 3.6 times stronger than that of the conventional directly connected single-turn coil.At a charging voltage of 20 kV,the peak magnetic field reaches 19 T in a magnetic field coil of 5 mm inner diameter.The inductively coupled coil made of CuBe solves the problem of coil expansion in intense magnetic field,and a peak magnetic field of 33 T is obtained at a charging voltage of35 kV.The present approach creates stronger magnetic field environments.At the same time,the inductively coupled coil reduces the requirements for system inductance,so that components such as energy storage capacitors and switch can be placed far from the coil,which improves the flexibility of the experiment setup.

关 键 词：激光等离子体 磁化等离子体 脉冲强磁场设备 电感耦合线圈 

分 类 号：TM55[电气工程—电器]