Development of Infrared Detector for Astronomical Camera in Space

在与三菱电气公司的合作下，对PtSi肖特基势垒CSD器件进行了极低温下的评估。在这种测量中最重要的事情之一是在几种情况下器件的电荷转移效率(CTE)的变化，以及将器件的读出噪声降到最低也是很重要的。此外，还测量了HIMAC的质子辐照损伤后的CTE以及东京大学的60Co的伽马射线。这些测量是在不同的条件下进行的，包括不同的温度，器件的驱动模式，以及在非常暗的情况下，器件中的电子很少。根据我们的测量结果，我们找到了适合行星探测器的最合适的设计，并实际选择了用于行星C/VCO任务的探测器。该装置的出色性能使我们能够在飞行任务的巡航阶段对黄道光进行观测。

An evaluation of PtSi Schottky Barrier CSD device at very low temperature was done under collaboration with Mitsubishi Electric Company. One of the most important thing in this measurement is the variation of the charge transfer efficiency (CTE) of the device under several conditions, and it is also important to minimize the read-out noise of the device. The CTE was also measured after the radiation damage by proton beam in HIMAC as well as by gamma ray of 60Co at University of Tokyo. These measurements were performed under various conditions including several temperature, driving mode of the device, and under the very dark situation with very few electrons in the CCD device. Using our measurements, we find out the most suitable design for the detector for a planetary explorer, and actually the designed device is selected for the one for PLANET-C/VCO mission. The excellent performance of the device enables us to conduct observations of the zodiacal light during the cruising phase of the mission.