论文标题
在强磁场中，活跃的横向能滤波器以较大的螺距角度区分低能颗粒
An active transverse energy filter to differentiate low energy particles with large pitch angles in a strong magnetic field
论文作者
论文摘要
我们为带电颗粒的角度选择性滤波器提供了原理测量的概念和证明。设置的动机源于在Mac-E滤光片类型的光谱仪中将背景电子与信号电子区分开。尽管很大一部分背景电子相对于磁性引导场表现出主要的角度（对应于运动组件中横向线线的低数量的动能，在下面称为横向能量），并传递过过滤器，主要是未受到不受欢迎的过滤器，从同位素发射源与活跃的滤器相互作用，并检测到了与活动源相互作用并检测到的。使用微通道板（MCP）作为活动过滤器元件来证明该概念。当与磁场正确对齐时，具有较小横向能的电子通过MCP的通道而无需相互作用，而具有较大横向能的电子撞击了通道墙，并触发了随后被检测到的二次电子的雪崩。由于MCP的实际横向能过滤器的几个缺点，因此提出了一种使用微结构Si-Pin二极管的替代检测技术。
We present the idea and proof of principle measurements for an angular-selective active filter for charged particles. The motivation for the setup arises from the need to distinguish background electrons from signal electrons in a spectrometer of MAC-E filter type. While a large fraction of the background electrons exhibit predominantly small angles relative to the magnetic guiding field (corresponding to a low amount of kinetic energy in the motion component transverse to the field lines, in the following referred to as transverse energy) and pass the filter mostly unhindered, signal electrons from an isotropically emitting source interact with the active filter and are detected. The concept is demonstrated using a microchannel plate (MCP) as an active filter element. When correctly aligned with the magnetic field, electrons with a small transverse energy pass the channels of the MCP without interaction while electrons with large transverse energies hit the channel walls and trigger an avalanche of secondary electrons that is subsequently detected. Due to several drawbacks of MCPs for an actual transverse energy filter, an alternative detection technique using microstructured Si-PIN diodes is proposed.
