【摘要】 ASIC芯片VA140是64路电荷灵敏放大器,具有低噪声、低功耗等特点,还具备信号成型、保持、多路模拟信号读出等功能。本工作在完成VA140的线性度测试基础上,设计了基于VA140的硅片探测器测试系统。利用²⁰⁷Bi放射源,首先测试得到2 mm厚硅片探测器的能量分辨以及信噪比,然后测试得到内转换电子穿过300μm厚硅片探测器的沉积能谱。测试结果验证了将VA140用于中国电磁监测试验卫星300μm厚硅条探测器的可行性。更多还原

【Abstract】 VA140 is a 64 channel charge sensitive amplifier ASIC with low- noise、low- power characteristics and hold、multiplexed analog readout、calibration facilities. The silicon detector readout electronic system based on VA140 was designed after testing VA140’s. This paper gives the²⁰⁷ Bi radioactive source test results of 2mm thickness silicon detector and the and SNR. The result of 300 μm thickness silicon detector’s²⁰⁷Bi test confirms the feasibility of using VA140 as the electronic readout of 300 μm thickness double strip silicon detector in the China electromagnetic detection test satellite更多还原