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dc.contributor.advisorPucci, Paul F.
dc.contributor.authorLaChance, George M.
dc.date1964
dc.date.accessioned2012-08-29T23:36:40Z
dc.date.available2012-08-29T23:36:40Z
dc.date.issued1964
dc.descriptionApproved for public release; distribution is unlimited
dc.description.abstractCryogenic pumping is a means of maintaining a high vacuum with large gas in-leakage rates. This is accomplished by the condensation and freezing of the gas molecules onto a surface that is maintained at a temperature well below the freezing point of the gas. A liquid helium filled "batch process" cryogenic pumping system was constructed and instrumented. The vacuum chamber and roughing system were obtained by the modification and redesign of an existing vacuum furnace. The theory of cryogenic pumping is presented and an approach developed for the evaluation of the cryopump performance.
dc.description.urihttp://hdl.handle.net/10945/13275
dc.description.urihttp://www.archive.org/details/theoryconstructi00lach
dc.language.isoen_US
dc.publisherMonterey, California: U.S. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
dc.subject.lcshMechanical engineeringen_US
dc.titleThe theory and construction of a liquid helium cryogenic pump.en_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentMechanical Engineering
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Mechanical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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