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1 工作原理 这种主检测器包括512个通道氙气检测器,通过施加高压的电极,采集入射的X线使氙电离产生的电流,然后将电流信号输出。每个通道的电流信号通过封闭的针状引线传送到四块基板上,这些基板用于连接Q—MUX块。在Q—MUX上这些电流信号,变成充电信号,这些充电信号又被送到Q/V板即充电/电压转换器上,变成电压信号,再经FPA/ADC板的放大并转变数字信号最后由(Timg I/O)接口控制板输送到FRU系统进行图像重建。
1 Principle of Operation The main detector consists of 512 channel xenon detectors. By applying a high voltage electrode, the incident x-rays are collected and the current generated by the xenon is ionized. Then the current signal is output. The current signal of each channel is transmitted to four substrates through closed pin wires. These substrates are used to connect Q-MUX blocks. These current signals on the Q-MUX become charge signals. These charge signals are sent to the Q/V board, that is, the charge/voltage converter, and become voltage signals. Then, they are amplified by the FPA/ADC board and converted into digital signals. Finally, the (Timg I/O) interface control board is transported to the FRU system for image reconstruction.