FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The patent pertains to the field of vacuum technology, particularly superhigh-vacuum units in which uncondensed gases are pumped out by cryogetter pumps, contained in the working volume and cooled by liquid or gas helium. The object of the invention is to prevent the atmosphere from acting on the depressurization sorbent of the working volume of the unit. For this purpose the cryogetter pump has been placed under the housing, and, to attach it to the working volume of the chamber within the housing, an opening has been made, which can be closed by a cut-off valve during depressurization of the chamber. In order to reduce the heat flux to the cryogetter pump, the housing is equipped with a coil in which a coolant is circulated, and an optically nontransparent shutter-type screen has been placed at the inlet to the opening.
- Machinery and Tools