Development of a Sub-mK Continuous Nuclear Demagnetization Refrigerator

@article{Schmoranzer2018DevelopmentOA,
  title={Development of a Sub-mK Continuous Nuclear Demagnetization Refrigerator},
  author={D. Schmoranzer and R. Gazizulin and S. Triqueneaux and E. Collin and A. Fefferman},
  journal={Journal of Low Temperature Physics},
  year={2018},
  volume={196},
  pages={261-267}
}
We present the development of a two-stage PrNi$$_5$$5 continuous demagnetization refrigerator at the Institut Nel/CNRS and numerical simulations of its performance. The thermal model used in the simulations is discussed in detail including the likely sources of heating. We demonstrate the effects of the critical thermal links including superconducting heat switches as well as the heat conductivity of the PrNi$$_5$$5, accounting for the dependence of cooling power on the PrNi$$_5$$5 rod diameter… Expand
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References

SHOWING 1-10 OF 16 REFERENCES
Optimization procedure for the cooling of liquid 3He by adiabatic demagnetization of praseodymium nickel
The construction and performance of a single stage nuclear demagnetization apparatus utilizing 0.267 mole of praseodymium nickel material is described. An optimization procedure to minimize entropyExpand
Nuclear refrigeration properties of PrNi5
Properties of the metallic Van Vleck paramagnet PrNi5 which are relevant for its use as a nuclear refrigerant (particularly its nuclear entropy) have been measured, and are discussed in comparison toExpand
Superconducting aluminum heat switch and plated press-contacts for use at ultralow temperatures.
TLDR
Al is a better material for a heat switch than the usually used superconductors because of its large k(n) and large Debye temperature (reducing the lattice conductivity k(s). Expand
Development of a cryogen-free continuous ADR for the constellation-X mission
Constellation-X is a multi-satellite X-ray astronomy mission presently being planned for launch in the 2010 time frame. Each of four identical satellites will contain a telescope and instruments forExpand
Matter and Methods at Low Temperatures
This textbook contains a wealth of information essential for successful experiments at low temperatures. The first chapters describe the low-temperature properties of liquid and solid matter,Expand
Electrical Conductance of Bolted Copper Joints for Cryogenic Applications
We present the results of electric contact resistance measurements at low temperatures on copper-to-copper bolted joints. Our accurate and systematic data display a rather small dispersion, and mayExpand
The thermal conductivity of PrNi5; electroplating of PrNi5
Abstract Thermal conductivity measurements on two rod-shaped samples of PrNi5 are presented. Their RRR values were 2.34 and 15, respectively, whereas their conductivities can be described by κ = 0.12Expand
Nuclear Magnetic Ordering in PrNi5 at 0.4 mK
The nuclear specific heat of the hyperfine-enhanced Van Vleck paramagnet Pr${\mathrm{Ni}}_{5}$ has been measured from 0.2 to 100 mK in magnetic fields up to 6 T. The $^{141}\mathrm{Pr}$ nuclei orderExpand
Thermal Conductivity of Soils
Abstract : The aim of this investigation has been to create a mathematical model for calculating thermal conductivity of soils with ordinary soil parameters as input data. One part of this work hasExpand
The European Microkelvin Platform
The growing demands of quantum materials, engineering and technology make access to microkelvin temperatures ever more essential. Experience in Europe suggests that new working methods, encouraged byExpand
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