CAJ | 학술논문

噪声因子是输入信噪比和输出信噪比的比值,能够反映微通道板的噪声特性,是影响微光像增强器信噪比的主要因素.为探寻降低微光像增强器中防离子反馈微通道板噪声因子的技术途径,根据微通道板噪声因子定义和测试原理,构建了防离子反馈微通道板噪声因子测试系统.由于防离子反馈微通道板的输入面镀覆有一层薄膜,其对微通道板的噪声因子有较大影响.因此,利用噪声因子测试系统重点测试了有、无防离子反馈膜以及不同材料、不同孔径、不同输入电子能量、不同微通道板作电压条件下的微通道板噪声因子,获得了微通道板噪声因子与输入电子能量、微通道板电压之间的关系,为降低防离子反馈微通道板噪声提供了有效的技术指导.
조성인자시수입신조비화수출신조비적비치,능구반영미통도판적조성특성,시영향미광상증강기신조비적주요인소.위탐심강저미광상증강기중방리자반궤미통도판조성인자적기술도경,근거미통도판조성인자정의화측시원리,구건료방리자반궤미통도판조성인자측시계통.유우방리자반궤미통도판적수입면도복유일층박막,기대미통도판적조성인자유교대영향.인차,이용조성인자측시계통중점측시료유、무방리자반궤막이급불동재료、불동공경、불동수입전자능량、불동미통도판작전압조건하적미통도판조성인자,획득료미통도판조성인자여수입전자능량、미통도판전압지간적관계,위강저방리자반궤미통도판조성제공료유효적기술지도.
The noise factor, which is the main factor affecting the noise performance of image intensifier and can accurately reflect the noise characteristics of the microchannel plate, is the ratio of the input signal to noise ratio and the output signal to noise. According to definition of noise factor of microchannel plate and test principle, filmed MCP test system was established in order to study the technical way to reduce noise factor of MCP. The input surface of the MCP was covered with ion feedback film, which had a great impact on the noise factor of the MCP. Hence, noise factor of filmed MCP and un-filmed MCP were measured respectively, and the noise factor with different material, different channel pore, different incident electrons and MCP voltage were measured too. Relationships between noise factor and incident electron, noise factor and MCP voltage was obtained. That was valuable to reduce the noise of filmed MCP.