A Gifford-McMahon Cycle Cryocooler below 2K

Satoh, Toshimi; Onishi, Atsushi; Adachi, Yasuhiro; Satō, Kiyoo; Minehara, Eisuke

doi:10.1007/0-306-47112-4_48

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…T Satoh et al [8] have explored a Gifford-McMahon cryocooler operating below 2K. According to the proposed theory, a Gifford-McMahon (GM) cycle cryocooler with 4 He cannot cool below 2 K because of the 4 He super fluid transition near this temperature.…”

Section: Introductionmentioning

confidence: 99%

An Investigative Review and Experimental Approach for the Performance Assessment of Small Scale Gifford-McMahon Cryocooler

Krishna¹,

Tjprc²

2019

IJMPERD

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Helium recondensation or liquefaction system is the best platform to liquefy or to condense the helium in many applications viz., Nuclear Magnetic Resonance (NMR), Magnetic Resonance Imaging (MRI) and Superconducting Quantum Interference Devices (SQUIDS). These applications make use of liquid helium as a refrigerator. The large scale liquefaction systems serve as a central facility to provide liquid helium. The above mentioned applications require refilling on a regular basis which is troublesome in case of large scale liquefaction system; one can make use of small scale liquefaction setup based on a cryocooler. An effort has been made to develop a small scale liquefaction system by using two-stage Gifford McMahon cryocooler. This investigative review paper illustrates the liquefaction of helium by using a commercial cryocooler with 1.5 W cooling power at 4.2 K, provided with facility to precooling of incoming gas by using special type of heat exchangers.Impact Factor (JCC): 7.6197 SCOPUS Indexed Journal NAAS Rating: 3.11 either isentropic or isenthalpic. Usually Joule-Thomson expansion results in an isenthalpic expansion and a reciprocating engine or turbine expansion results in an isentropic expansion. Normally the helium gas liquefaction is carried out by the conventional Linde and Claude's processes. In Linde method, air is cooled, compressed and expanded in an alternate manner and the expansion process results in a lowering of temperature each time [3,4].

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Section: Introductionmentioning

confidence: 99%

An Investigative Review and Experimental Approach for the Performance Assessment of Small Scale Gifford-McMahon Cryocooler

Krishna¹,

Tjprc²

2019

IJMPERD

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“…1,2 This modification enabled Toshiba scientists to lower the low temperature limit of the G-M cryocooler from ~10 K to ~4 K. Subsequently, several other lanthanide materials, in particular Nd 3 and HoCu 2 (Ref. 4), have been utilized for cooling down to ~4 K. More recently Er and Er-Pr alloys (up to 50 at.% Pr) have been suggested as a replacement for Pb 5,6 as the intermediate temperature (~10 to ~60 K) range regenerator material. Today research is still being continued on finding improved regenerator materials, especially below 10 K, in order to enhance the performance of Stirling, G-M, and pulse tube cryocoolers.…”

Section: Introductionmentioning

confidence: 99%

Low Temperature Cryocooler Regenerator Materials

Gschneidner

Pecharsky

2003

Cryocoolers 12

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There are four important factors which influence the magnitude of the magnetic heat capacity near the magnetic ordering transition temperature. These include the theoretical magnetic entropy, the deGennes factor, crystalline electric field, and the RKKY (RudermanKittel-Kasuya-Yosida) interaction. The lattice contribution to the heat capacity also needs to be considered since it is the sum of the lattice and magnetic contributions which give rise to the heat capacity maxima. The lattice heat capacity depends on the chemical composition, crystal structure and temperature. As a result, one can obtain large changes in the heat capacity maxima by alloying. Several ternary intermetallic systems have been examined in light of these criteria. A number of deviations from the expected behaviors have been found and are discussed.

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“…Satoh, et al [26] used a combination of lead, HoCu 2 and NdInCu 2 within a G-M cycle cryocooler to reach temperatures below 2K in 2001. HoCu 2 experiences a broad double peak between 5 and 10 K, while NdInCu 2 peaks at 2K.…”

Section: Properties Of Regenerator Matrixesmentioning

confidence: 99%

Low temperature properties of some RIn3 compounds

Hale

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Table 1-1: Lattice parameter values (Å) reported for the RIn 3 family of compounds. YIn 3 4.597 [5] SmIn 3 4.622 [1] HoIn 3 4.573 [5] 4.5935 [7] cast 4.6259 [7] cast 4.57 [6] 4.5941 [7] anneal 4.626 [7] anneal 4.5732 [7] cast 4.5919 [9] 4.6265 [9] 4.572 [7] anneal 4.592 [11] 4.62 [14] 4.5725 [9] 4.6 [14] GdIn 3 4.6103 [4] 4.573 [12] LaIn 3 4.732 [3] 4.611 [5] ErIn 3 4.559 [5] 4.7345 [7] cast 4.6066 [7] cast 4.563 [6] 4.7321 [9] 4.6063 [7] anneal 4.5644 [7] cast 4.739 [11] 4.6068 [9] 4.5652 [7] anneal CeIn 3 4.68 [2] TbIn 3 4.588 [5] 4.5636 [9] 4.6893 [7] cast 4.5897 [7] cast 4.553 [14] 4.6892 [7] anneal 4.5898 [7] anneal TmIn 3 4.554 [5] 4.6876 [9] 4.5896 [8] 4.5584 [7] cast 4.687 [11] 4.5878 [9] 4.5577 [7] anneal PrIn 3 4.67 [1] 4.582 [12] 4.561 [8] 4.6716 [7] cast 4.581 [14] 4.548 [9] 4.6715 [7] anneal DyIn 3 4.5762 [4] 4.549 [14] 4.6707 [9] 4.583 [5] YbIn 3 4.62 [5] 4.671 [13] 4.5791 [7] cast 4.6146 [7] cast NdIn 3 4.655 [1] 4.5802 [7] anneal 4.6147 [7] anneal 4.6554 [7] cast 4.5785 [9] 4.6164 [8] 4.6551 [7] anneal 4.576 [10] 4.611 [9] 4.653 [9] 4.573 [14] 4.616 [11] 4.64 [14] LuIn 3 4.544 [5] PmIn 3 4.63 [16] theor. 4.5526 [7] cast 4.547 [11] 4.544 [14] 1.1.1.3 Reported magnetic properties One of the best ways of determining the magnetic properties of a material is by measuring its magnetic susceptibility. Magnetic susceptibility, χ, is defined as the magnetization of the material, M, divided by the applied magnetic field, H:

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A Gifford-McMahon Cycle Cryocooler below 2K

Cited by 5 publications

References 3 publications

An Investigative Review and Experimental Approach for the Performance Assessment of Small Scale Gifford-McMahon Cryocooler

An Investigative Review and Experimental Approach for the Performance Assessment of Small Scale Gifford-McMahon Cryocooler

Low Temperature Cryocooler Regenerator Materials

Low temperature properties of some RIn3 compounds

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