DSP大气中子单粒子效应试验研究

Experimental Investigation of DSP Single Event Effect Caused by Atmospheric Neutron

利用14Me V快中子辐照源,开展了数字信号处理器(DSP)大气中子单粒子效应地面模拟试验研究。设计了地面模拟的试验方法,包括单粒子效应监测方法、试验系统布局、试验程序及其判据等。获得了SMJ320F2812、SMJ320C6415、TMS320C6416、TMS320C6418等多款型号DSP器件的中子单粒子效应的翻转错误数试验数据,分析计算得到14Me V中子辐照源下的敏感截面。结果显示,DSP器件的主要敏感现象为单粒子翻转(SEU),部分器件还发生了单粒子功能中断效应(SEFI)。相同工艺的被测DSP器件的中子单粒子效应敏感截面具有相同的数量级,验证了本文使用的地面模拟试验方法的可行性,为航空电子设备的可靠性与安全性评估提供了大气中子单粒子效应的器件级基础数据。

The research of the sensitive property of Digital Signal Processor （DSP） single event effect under the atmospheric neutron radiation environment was carried out based on the 14Mev neutron radiation source in this paper. An experiment scheme on ground was designed including detection, experimental setup, testing procedure and criterion of the single event effect caused by atmospheric neutron. Different types of DSP, such as SMJ320F2812, SMJ320C6415, TMS320C6416, TMS320C6418, were used in the test. The results of the Single Event Upset （SEU） were acquired and then the cross section was calculated. The results show that the main sensitive phenomenon is single event upset, Single Event Function Interrupt （SEFI） occurred in some devices. The devices with the same feature size have the same order of the cross section magnitude, validating the feasibility of the experimental method. The results provide the basic data to evaluate the reliability and security of the avionic electronic equipments.