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A compact dilution refrigerator with vertical heat exchangers for operation to 2 mK

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Abstract

We describe a compactly designed dilution refrigerator with closely packed, vertical heat exchangers. The refrigerator reaches a temperature of 2 mK and is easily constructed, since the sintered heat exchangers are straight units. Vibrating wire resonators are employed in the mixing chamber as diagnostic tools, which may act as both thermometers and phase-boundary level indicators. There is a design problem in the vertical arrangement, namely, the sumps on the concentrated phase side that can slowly fill with dilute phase and degrade the performance. The problem is solved by draining the superfluid4He component in any collected dilute phase through superleaks into the mixing chamber.

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Author notes

  1. Yu. M. Bunkov

    Present address: Institute for Physical Problems, U.S.S.R. Academy of Sciences, ul. Kosygina 2, Moscow, U.S.S.R.

Authors and Affiliations

  1. School of Physics and Materials, Lancaster University, Lancaster, U.K.

    Yu. M. Bunkov, A. M. Guénault, D. J. Hayward, D. A. Jackson, C. J. Kennedy, T. R. Nichols, I. E. Miller, G. R. Pickett & M. G. Ward

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  1. Yu. M. Bunkov
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  2. A. M. Guénault
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  3. D. J. Hayward
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  4. D. A. Jackson
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  5. C. J. Kennedy
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  6. T. R. Nichols
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  7. I. E. Miller
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  8. G. R. Pickett
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  9. M. G. Ward
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Bunkov, Y.M., Guénault, A.M., Hayward, D.J. et al. A compact dilution refrigerator with vertical heat exchangers for operation to 2 mK. J Low Temp Phys 83, 257–272 (1991). https://doi.org/10.1007/BF00683626

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  • DOI: https://doi.org/10.1007/BF00683626

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