Our recently published paper [1] presents a theoretical treatment of the degradation in performance of multilayer insulation (MLI) when there is a small amount of radiative transmission through each of the insulation layers. We present predictions of this degradation obtained by a skin depth calculation of the penetration of long wave radiation impinging on the thin aluminum layers used in this insulation. As a result, we predicted observable degradation in the performance of thinly coated MLI when used as a shield between cold objects such as shielding a 4 K object from a 77 K object.

However, as we pointed out in our paper, there are conflicting statements in the literature concerning the low temperature performance of MLI. So we arranged to have the transmission of a single sheet of MLI measured from 200 GHz to 1.6 THz. We recently obtained the results...

References

References
1.
Youngquist
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R. C.
,
Nurge
,
M. A.
,
Johnson
,
W. L.
, and
Starr
,
S. O.
,
2015
, “
Modeling Transmission Effects on Multilayer Insulation
,”
ASME J. Thermal Sci. Eng. Appl.
,
7
(
2
), p.
021007
.
2.
Laman
,
N.
, and
Grischkowsky
,
D.
,
2008
, “
Terahertz Conductivity of Thin Metal Films
,”
Appl. Phys. Lett.
93
(
5
), p.
051105
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