Ultrafast proton radiography of the magnetic fields generated by a laser-driven coil current
Ultrafast proton radiography of the magnetic fields generated by a laser-driven coil current
复制标题
DOI：
10.1063/1.4945643
复制
发表时间：
2016-04-01
影响因子：
2.2
通讯作者：
Alfonso, Noel
中科院分区：
文献类型：
--
作者：
Gao, Lan;Ji, Hantao;Alfonso, Noel
通过连接两个铜箔的u形线圈的电流产生的磁场用超快质子射线照相测量。两个1.25 kJ， 1 ns的激光脉冲通过前箔的激光入口孔传播，并以3 × 10(16) W/cm(2)的强度聚焦到后箔上。强烈的激光-固体相互作用在铜箔之间产生高电压，并在连接线圈中产生大电流。质子数据显示线圈中心有40-50 T的磁场，类似于激光照射后3-4 ns的磁场。这些实验为未来的目标设计提供了重要的见解，旨在为高能量密度科学的各种应用开发强大的外部磁场源。(C) 2016 AIP出版有限责任公司
Magnetic fields generated by a current flowing through a U-shaped coil connecting two copper foils were measured using ultrafast proton radiography. Two similar to 1.25 kJ, 1-ns laser pulses propagated through laser entrance holes in the front foil and were focused to the back foil with an intensity of similar to 3 x 10(16) W/cm(2). The intense laser-solid interaction induced a high voltage between the copper foils and generated a large current in the connecting coil. The proton data show similar to 40-50 T magnetic fields at the center of the coil similar to 3-4 ns after laser irradiation. The experiments provide significant insight for future target designs that aim to develop a powerful source of external magnetic fields for various applications in high-energy-density science. (C) 2016 AIP Publishing LLC.