A 3He pulse tube cooler operating down to 1.3 K

Jiang, Ning; Lindemann, Udo; Giebeler, F.; Thummes, G.

doi:10.1016/j.cryogenics.2004.05.003

Cited by 49 publications

(73 citation statements)

References 14 publications

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“…For 4 He this is just above the lambda point and for 3 He at 15 bar it is 1.04 K [29]. The lowest temperature, reached in experiment, is 1.27 K, [20] so very close to the theoretical minimum. In Ref.…”

Section: Cooling Powermentioning

confidence: 91%

“…In these systems there can be no uncontrolled internal circulations (DC-flow) of the gas and each of the PTR's can be optimized separately. In this kind of system the world record of low temperature in PTR's (1.27 K) is reached while the second system was operated with 3 He as the working fluid [20]. With a superfluid vortex cooler, precooled by this system, the temperature has been lowered to 1.19 K with the potential of obtaining 0.7 K in this way [21].…”

Section: The Various Types Of Ptrmentioning

confidence: 99%

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Basic Operation of Cryocoolers and Related Thermal Machines

Waele

2011

J Low Temp Phys

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This paper deals with the basics of cryocoolers and related thermodynamic systems. The treatment is based on the first and second law of thermodynamics for inhomogeneous, open systems using enthalpy flow, entropy flow, and entropy production. Various types of machines, which use an oscillating gas flow, are discussed such as: Stirling refrigerators, GM coolers, pulse-tube refrigerators, and thermoacoustic coolers and engines. Furthermore the paper deals with Joule-Thomson and dilution refrigerators which use a constant flow of the working medium.

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Section: Cooling Powermentioning

confidence: 91%

Section: The Various Types Of Ptrmentioning

confidence: 99%

Basic Operation of Cryocoolers and Related Thermal Machines

Waele

2011

J Low Temp Phys

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“…1 The 4 He stage precools the 3 He stage and the thermal shield down to 23 K. The 3 He stage has a noload temperature of 1.27 K and provides 8 mW of cooling power at 1.45 K.…”

Section: A Experimental Setupmentioning

confidence: 99%

“…In 2003 a lowest temperature of 1.27 K has been reached with a two-stage PTR. 1 This temperature is just above the limiting temperature for PTRs, which is about 1 K. However, by using a PTR as a precooling stage, the lowest temperature can be brought further down. In this research we have used a PTR as a precooler for a superfluid vortex cooler 2,3 ͑SVC͒.…”

Section: Introductionmentioning

confidence: 99%

Superfluid Vortex Cooler

Tanaeva¹,

Lindemann²,

Jiang³

et al. 2004

AIP Conference Proceedings

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. In this contribution a superfluid vortex cooler ͑SVC͒ is described. A SVC is a cooling device, the operation of which is based on the special properties of superfluid helium ͑He II͒. The SVC is small, simple, has no moving parts, and is gravity independent. It is capable of reaching temperatures as low as 0.65 K. First we have carried out a number of experiments, using a liquid-helium bath as a precooler for the SVC. Various geometries of the cooler components as well as the influence of the working pressure and the base temperature on the performance of the cooler have been investigated. Temperature below 1 K have been reached with a base temperature of 1.4 K. The next step has been combining the SVC with a pulse-tube refrigerator. In a preliminary experiment a lowest temperature of 1.19 K has been reached. Several ways to improve the system are suggested.

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“…Satoh and Numazawa [5] then achieved a cooling temperature of 1.47 K using 3 He as working fluid in a G-M cryocooler with a new regenerative material. Jiang et al [6] further lowered the cooling temperature down to 1.27 K in a separated-type two-stage pulse tube cryocooler. They also compared experimental results obtained by substituting 3 He for 4 He.…”

mentioning

confidence: 99%