This work evaluates the viability of polyimide and parylene-C for passivation of lithium-drifted silicon (Si(Li)) detectors. The passivated Si(Li) detectors will form the particle tracker and X-ray detector of the General Antiparticle Spectrometer (GAPS) experiment, a balloon-borne experiment optimized to detect cosmic antideuterons produced in dark matter annihilations or decays. Successful passivation coatings were achieved by thermally curing polyimides, and the optimized coatings form an excellent barrier against humidity and organic contamination. The passivated Si(Li) detectors deliver $\lesssim$ 4 keV energy resolution (FWHM) for 20$-$100 keV X-rays while operating at temperatures of $-$35 to $-$45 °C. This is the first reported successful passivation of Si(Li)-based X-ray detectors operated above cryogenic temperatures.

这项工作评估了聚酰亚胺和聚对二甲苯-C对锂漂移硅（Si（Li））检测器的钝化能力。钝化的Si（Li）探测器将构成通用反粒子光谱仪（GAPS）实验的粒子跟踪器和X射线探测器，该实验是一种气球式实验，用于检测暗物质an灭或衰变中产生的宇宙抗氘核。通过热固化聚酰亚胺获得成功的钝化涂层，并且经过优化的涂层对湿度和有机污染物形成了极好的屏障。钝化的Si（Li）探测器可提供$\lesssim$ 4 keV能量分辨率（FWHM）为20$-$在以下温度下运行时100 keV X射线 $-$35至 $-$45℃。这是首次报道的在低温下工作的基于Si（Li）的X射线探测器成功钝化。