Table 1 Estimation of the characteristic lengthscale \(\ell \), thermal diffusivity α and thermal timescale \(\tau ={\ell }^{2}/\alpha \). Values evaluated at 100 K, for a aluminium vial, helium filled gap and copper TESU.
From: Cooling of a vial in a snapfreezing device without using sacrificial cryogens
\(\ell \) [m] | α [m2s−1] | τ [s] | |
|---|---|---|---|
vial wall δ | 2 × 10−4 | 1 × 10−4 | 4 × 10−4 |
gap d | 4 × 10−4 | 2 × 10−5 | 8 × 10−3 |
TESU wall W | 1 × 10−2 | 1.5 × 10−4 | 6 × 10−1 |
