I worked at Moxtek in Orem Utah for a period of time in the lat 90's, they build low noise JFETs, assemblies containing the JFETs and other items for XRF (X-ray Fluorescence) equipment. When the JFET assemblies are operating they're cooled to a temperature close to liquid nitrogen the only reason they're not at the same temperature as the liquid nitrogen is they have a tiny heater that keeps them at their optimal operating temperature. When not operating & turned off their temperature gets very close to the tempo of the liquid nitrogen. One of the tests I had to run was on some Honeywell Mil-Spec IR LEDs, was simulating the cold /hot cycles the equipment would go through. The diodes had to with stand being dunked into liquid nitrogen for a specified number of times. I looked at putting together a mechanical dunker for the tests, and decided I could get it done faster by doing it by hand. While the Diodes passed with flying colors any temperature color shift didn't make them visible.
NASA's Orion Flight Software Production Systems Manager Darrel G. Raines joins Planet Analog Editor Steve Taranovich and Embedded.com Editor Max Maxfield to talk about embedded flight software used in Orion Spacecraft, part of NASA's Mars mission. Live radio show and live chat. Get your questions ready.
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