Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Performance Heat Conductor with Small Spring Constant for Cryogenic
  Applications   We developed a soft and high thermal conductive heat link for cryogenic
applications. The measured maximum thermal conductivity was approximately 18500
W/m/K at 10 K. This spring constant was 1/43 of that of a single thick wire
with the same cross-sectional area at room temperature. We realized these
performances by utilizing high purity aluminum (99.9999 %, 6N) and by stranding
many thin wires that are 0.15 mm in diameter. The electrical Residual
Resistivity Ratio (RRR) was also measured and used to estimate the thermal
conductivity by Wiedemann-Franz law. We observed the size effect on the
electrical conductivity, and evaluated the effect of mechanical deformation to
the RRR. These evaluations allow us to design a pragmatic heat link for
cryogenic application.

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The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph