Fabrication and absolute calibration of B-dot probe for magnetic field measurement on a high power l

• 作 者: Longyu KUANG Feibiao XUE Longfei JING Ruizhen YU Huabing DU Tao YI Tingshuai LI Hang LI Yi YU Feng WANG Shaoen JIANG Guangyue HU Jian ZHENG
• 机 构: Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei
• 出 处: 等离子体科学和技术（英文版）
• 发表日期: 2020年8期
• 关键词: B-dot magnetic field diagnostic laser targeting

The fabrication and absolute calibration of a B-dot probe is employed to measure the pulsed magnetic field at the Shenguang-Ⅱ high power laser facility.Copper enameled silk with a cross section diameter of 0.1 mm is used to wind the one-turn coil with a 1 mm diameter.Two coils are paired and reversely linked to their respective circuits to form a differential B-dot probe that is sealed in and protected by a quartz shell.This B-dot probe is experimentally calibrated and then used to measure the pulsed magnetic field in laser targeting experiments at the Shenguang-Ⅱ high power laser facility.Signals show a high performance of this B-dot probe.The common mode noise can be effectively canceled out by the differential pair.The magnetic field of over 300 T can be extrapolated at the location close to the target.