Radiation Effects on Microcircuits

Microcircuit response to nuclear radiations has become an increasingly important concern over the past year. This discussion will consider transient radiation effects (TRE); a companion discussion will cover space radiation effects. The interesting effects occur in two areas: displacement effects resulting from fast neutron irradiation, and ionizing effects caused by prompt pulses composed of x-rays and ?-rays. Fast neutron degradation of microcircuit performance is dominated by transistor current gain reduction. Current gain degradation in microcircuit transistor elements follows the same laws as current gain reduction in discrete transistors of similar base region design and geometry.     

第三届亚太地区辐射化学研讨会通知

<正>The 3rd Asia-Pacific Symposium on Radiation Chemistry (APSRC-2010) incorporating 10th Trombay Symposium on Radiation Photochemsitry (TSRP- 2010), organized by     

Radiation Effects on Multiplier Phototubes

A multiplier phototube is an extremely sensitive device used to measure ultraviolet, visible and near infrared radiant energy. Physically, multiplier phototubes are high vacuum tubes which are comprised of a photo-cathode; an electron lens, which directs the photo-electrons onto the first dynode; a series of dynodes or amplifying stages; and an anode or collector. The use of multiplier phototubes in photometric and nuclear detectors for satellite systems has increased dramatically within the last few years. Because many of these systems are subjected to either natural or artificially created radiation, such as encountered in the Van Allen belts, or the South Atlantic anomaly, or galactic or solar cosmic radiation, a study of the behavior of these tubes under such conditions has become necessary. This paper summarizes the work of EMR and that of many other investigators, and discusses degradation of optical windows used; effects on photocathodes and dynodes; effects on noise, dark current and resolution. A list of conclusions is given.