Low temperature process for breathing apparatus

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 217 KB
• Volume: 11
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(71)90212-8

✦ Synopsis

is an all stainless steel system consisting of a 1 K condensation bath, a pumping tube, and provision for running temperature probes to the dilution unit. The dilution unit is constructed from OFHC copper and stainless steel. The heat exchangers are sintered copper and the mixing chamber bottom is detachable to enable easy sample mounting. The control, monitoring, and gas handling unit includes vacuum pumps, valves, pressure gauges, storage tanks, impurity traps, and electrical interlocks, all of which provide routine operation of the cryostat and dilution unit.

The refrigerator has a heat extraction capacity of 1 000 ergss -l (lergs -~ = 10 -Tw) at0'lK,or 120ergss -1 at 0"04 K. Its simple, rugged construction allows operation in unfavourable environments. Possible experimental applications include Mossbauer spectroscopy, polarized targets for nuclear or elementary particle physics, quantum fluids, superconductivity, Kondo effect, thermal transport properties of solids, and nuclear demagnetization. A variety of optional equipment is available and the cryostat can be supplied as a standard immersion dewar or as a tail section dewar system. (