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超短强脉冲与固体靶相互作用产生超热电子,对超热电子的能谱及超热电子的空间分布研究的方法很多,如复合靶的Kα线法、高能离子测量法及硬X射线法等。但最直接的测量法是电子磁谱仪法。带电粒子在匀强磁场中由于受到洛伦兹力的作用而作圆周运动。电子动能不同,回旋轨道半径各异,沿回旋直径方向布放探测器即可测得电子能谱。实际上,电子除了受到磁场的洛伦兹力作用外,还必须考虑重力漂移、磁场的梯度漂移和曲率漂移的影响。重力漂移方向为g×B,使B的方向竖直向上可消除重力的影响。为了消除梯度漂移和曲率漂移影响,采取如下措施:1）真正使用的磁场区高度为5m。,可通过加大磁场区高度,使
Ultrashort pulses interact with solid targets to generate hyperthermal electrons. There are many methods to study the energy spectrum of hot electrons and the spatial distribution of hot electrons. For example, Kα line method, high energy ion measurement and hard X-ray method Wait. But the most direct measurement method is the electron spectrometer method. Charged particles in a uniform magnetic field due to the Lorentz force and circular motion. Different electron kinetic energy, different radius of orbital orbit, along the direction of the diameter of the gyroscope can be placed to measure the electronic spectrum. In fact, in addition to the electron Lorentz force magnetic field, but also must consider the gravity drift, the magnetic field gradient drift and curvature drift. Gravitational drift direction g × B, so that the direction of B upwards to eliminate the impact of gravity. In order to eliminate the effects of gradient drift and curvature drift, the following measures are taken: 1) The real magnetic field height is 5m. , By increasing the magnetic field height, so