Germanium And Germanium Diamond Bolometers Operated At 4.2 K, 2.0 K, 1.2 K, 0.3 K, And 0.1 K

The design, construction, and performance of state-of-the-art germanium and germanium-diamond bolometers operated at 4.2, 2.0, 1.2, and 0.3 K will be discussed. These detectors have a broad range of applications, and are particularly important for the long wavelength (far infrared to millimeter) regions. Current results may be extrapolated to lower temperatures and higher levels of performance. A system which will operate at 0.1 K using a He4-He3 dilution refrigerator is under development.