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dc.contributor.authorXu, M.en_US
dc.contributor.authorTakayama, H.en_US
dc.contributor.authorNakano, K.en_US
dc.date.accessioned2011-04-29T20:05:53Z
dc.date.available2011-04-29T20:05:53Z
dc.date.issued2008-05
dc.identifier.isbn978-1-934021-02-6
dc.identifier.urihttp://hdl.handle.net/1853/38757
dc.descriptionPresented at the 16th International Cryocooler Conference, held May 17-20, 2008 in Atlanta, Georgia.en_US
dc.description.abstractSumitomo Heavy Industries has been continuously improving the efficiency of our 4K pulse tube cryocooler in order to make it exchangeable with our 4K GM cryocooler. In order to improve the performance, three development model pulse tube cryocoolers have been built and tested. On the latest unit, the cooling capacity of the 4K pulse tube cryocooler has been improved to be equivalent to that of the 4K GM cryocooler. A typical cooling capacity of the latest pulse tube cryocooler is 40 W at 37.0 K on the first stage and 1.0 W at 3.86 K on the second stage when the compressor is operated at 50 Hz, and 40 W at 36.8 K on the first stage and 1.0 W at 3.82 K at 60 Hz. The input power is about 6.4 kW at 50 Hz and 7.7 kW at 60 Hz at steady state with 40 W heat load on the first stage and 1.0 W on the second stage. In addition, performance in a helium atmosphere has been measured and has been improved significantly by reducing the temperature difference between regenerator and pulse tube. The experimental results are described.en_US
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.relation.ispartofseriesCryocoolers 16. GM-type coolers for 4-30 k ground applicationsen_US
dc.subjectGM-type coolers for 4-30 k ground applicationsen_US
dc.subjectPulse tube cryocoolersen_US
dc.subjectHigh efficiency 4K PT coolersen_US
dc.subjectGifford McMahon coolersen_US
dc.titleDevelopment of High Efficiency 4 K Two-Stage Pulse Tube Cryocooleren_US
dc.typeProceedingsen_US
dc.contributor.corporatenameSumitomo Heavy Industriesen_US
dc.publisher.originalICC Pressen_US


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