SIRTF will require new liquid helium cryogenics and optical technology at liquid helium temperatures to meet the scientific requirements. In particular, it will require a helium cryogenic system operating at 1.25 K with a lifetime of five years. The optical system will require a 1-m mirror operating at 2 K, which is diffraction limited at 3 microns. This paper describes the advances which will be needed and the approaches to be taken.

Mason, P.↗

NASA NTRS1985

Protective Package for a Gamma-Ray Detector

Package for germanium gamma-ray detector protects semiconductor crystal from contamination, allows it to operate at high voltages, and isolates from shock and vibration. Package seals detector from its surroundings, whether in atmosphere or in vacuum of space. Main parts of package made of aluminum. Cover sealed to base by soft aluminum ring.

Fong, M.↗

NASA NTRS1982

Reflective-Shield Radiative Cooler

Tests show radiative cooler consisting of several thin reflective shields with a slight angle between them redirects flow of heat very effectively. Shield can be used for deflecting virtually any level of thermal radiation can be deflected by technique; but it may be useful in construction reflecting baffles in front of ovens or furnaces.

Petrick, W.↗