Closed cycle gas handling system

Details Closed cycle gas handling system Closed cycle gas handling system

1978-02-08

1980-01-22

Church, Craig E.

Radiant energy

Source with charged plate-type detector

250323, G09G 1300, G09G 1500

Patent

active

041851943

ABSTRACT:
Process and apparatus for providing an imaging gas under pressure to the imaging chamber of an electron radiographic system. After closing the imaging chamber, air is flushed out by introducing a condensable gas such as a Freon. The Freon is then flushed out by a charge of the imaging gas, such as xenon and krypton. The exhausted air-Freon mixture is collected and pressurized to condense and separate out the Freon from the air. The liquid Freon is then expanded into a gas and used for a subsequent flushing step. Similarly, the exhausted Freon-zenon mixture is retained and pressurized to liquify and separate the Freon from the xenon. The liquid Freon is expanded to a gas and used for a subsequent flushing operation and the xenon is used for a subsequent charge into the imaging chamber. After an exposure, the imaging gas is flushed out with Freon and the chamber may then be opened. Alternatively, the Freon may be flushed out by air prior to opening, with this Freon-air exhaust being retained and recycled so that there is substantially no loss of imaging gas or Freon.

REFERENCES:
patent: 3828191 (1974-08-01), Eseke et al.
patent: 3836777 (1974-09-01), Lewis et al.

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