Performance of Silicon Controlled Rectifiers in Radiation Environment

A Study of the effect of gamma radiation upon silicon controlled rectifiers (SCR´s) is presented and correlated with electron radiation encountered by spacecraft. Six electrical characteristics of each SCR were measured before, during, and after exposure to radiation. During irradiation some were unbiased, some biased, and others were pulsed electrically. Additionally, two different dose rates of radiation were employed. Test results are presented in graphic form, showing each of the six characteristics as a function of the total accumulated dose.