摘要
氧化钒(Vanadium Oxide,VO_(x))探测器对红外辐射敏感,尤其是在长波红外(Long-Wave Infrared,LWIR)波段,具有高灵敏度、低噪声、非制冷及成本效益显著等优势,在空间成像探测中发挥着重要作用。然而,空间辐射对VO_(x)的成像质量和可靠性会产生严重影响。为填补当前VO_(x)探测器辐射效应研究的不足,开展了地面辐射模拟试验,并对探测器辐射损伤进行了分析。采用在线与离线试验测试方法,系统研究了不同剂量下探测器输出变化。结合退火试验,探究了空间辐射对探测器性能退化规律。结果表明,电离辐射会显著影响探测器输出,当剂量值达31 krad(Si)后,黑体温度响应非均匀性及盲元数激增;当到达39 krad(Si)时,黑体响应非均匀性增加88%,盲元率增加66%,输出图像异常。该变化可通过室温退火恢复,退火72 h后,对黑体响应的输出平均灰度值与辐照前的结果相近,退火一周后盲元数量趋于0。该研究可为VO_(x)探测器的空间应用抗辐射加固提供参考。
[Background]Vanadium oxide(VO_(x))detectors play a crucial role in the fields of space infrared detection and imaging due to their sensitivity to infrared radiation,particularly in the Long-Wave Infrared(LWIR)range,as well as their advantages of high sensitivity,low noise,uncooled operation,and cost-effectiveness.However,performance degradation caused by space ionizing radiation,particularly the decrease in responsivity and the increase in noise levels,poses a significant threat to the imaging quality and reliability of these detectors.[Purpose]This study aims to bridge the current gap in research on the space radiation effects on VO_(x)detectors and provide input for their radiation hardening.[Methods]Ground-based radiation simulation experiments were conducted to analyze the radiation damage to VO_(x)detectors.Both online and offline testing methods were employed to systematically investigate the changes in detector output under varying radiation doses.Additionally,post-irradiation annealing tests were performed to examine the specific patterns of performance degradation in VO_(x)detectors under space radiation environments.[Results]The results indicate that space radiation significantly affects the output performance of VO_(x)detectors.When the accumulated dose reaches 31 krad(Si),the non-uniformity of the detector's blackbody temperature response and the number of dead pixels surge.At 39 krad(Si),the non-uniformity of the blackbody response escalates to 88%,the dead pixel rate climbs to 66%,and the output image becomes aberrant.Within 24 h after the irradiation test,the annealing effect of the VO_(x)infrared array detector is evident,with the average grayscale value of the blackbody response output closely aligning with the pre-irradiation results after 72 h of annealing,and the number of dead pixels tending towards 0 after one week of annealing.[Conclusions]Space radiation significantly impacts the output of VO_(x)detectors,with the detector's output performance declining as the radiation dose accumulates,reaching a point where the device cannot recognize objects in images at 24 krad(Si).The total ionizing dose effect at lower accumulated dose values does not constitute permanent damage,as the detector's performance can be restored through room-temperature annealing.This study provides valuable insights for the subsequent design of radiation-hardened VO_(x)detectors for space applications.
作者
银鸿
文轩
冯展祖
王俊
赵呈选
高欣
秦晓刚
史亮
张剑锋
杨生胜
YIN Hong;WEN Xuan;FENG Zhanzu;WANG Jun;ZHAO Chengxuan;GAO Xin;QIN Xiaogang;SHI Liang;ZHANG Jianfeng;YANG Shengsheng(Lanzhou Institute of Physics Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou 730000,China)
出处
《核技术》
北大核心
2025年第5期141-149,共9页
Nuclear Techniques
基金
国防科技重点实验室基金(No.JZJJXN20230004-08)
国防科技重点实验室基金(No.6142910220207)资助。
