The use of extreme cold (within a few degrees of absolute zero) Cryogenic systems often involve the use of liquid helium (4 Kelvin) or liquid nitrogen (77 K) Astro-E uses liquid helium and solid neon (17 K)
Pertaining to very low temperatures Aluminum gains strength as temperature is reduced, making it an appropriate material for cryogenic applications
Cryogenic conditions are conditions where temperatures are low enough for gases to condense to become liquids or solids For IFE capsules, deuterium and tritium can be frozen to solid, cryogenic form by the boiling of liquid helium
Frozen at extremely low temperatures The field of cryogenics is attempting to produce temperatures as close to absolute zero as possible Absolute zero is the temperature at which molecules stop moving altogether
Empire Magnetics cryogenic motors and related products are rated for an ambient temperature of 20° K though motors rated for an ambient temperature of 4° K have been provided on a custom basis