Refrigeration – Processes – Circulating external gas
Patent
1980-02-29
1982-07-13
Yudkoff, Norman
Refrigeration
Processes
Circulating external gas
62 40, 62 10, 425DIG26, F25J 102
Patent
active
043392520
ABSTRACT:
A diamond-anvil, high-pressure cell having an apertured steel gasket interposed between the opposed diamonds is lowered into a liquified hydrogen bath at cryogenic temperatures. After the liquid hydrogen permeates the cell through the viewing apertures an initial sealing pressure is applied to the cell by a remotely operated threaded arrangement sufficient to prohibit escape of the liquified hydrogen from the aperture in the steel plate which is closed by the opposed diamonds. The cell is then typically removed from the liquified hydrogen bath and introduced into a lever type pressure applicator to further increase the pressure on the hydrogen at room temperature for the observation of its effects through suitable apertures in the cell and to convert the same to solid form.
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Annual Report of the Director of the Carnegie Institution Geophysical & Laboratory for the year, Jul. 1, 1977-Jun. 30, 1978, which issued in Dec. 1978.
Bell Peter M.
Mao Ho-Kwang
Carnegie Institution of Washington
Yudkoff Norman
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