Table 1.

Uncertainty budget for temperature T at 20 mK using a CSNT with a resistance of approximately 2 mΩ.

input quantityvalue xistandard uncertainty u(xi)relative uncertainty u(xi)/xi (%)contribution (∂T/∂xi×u(xi)/uc)2 (%)
R1.861 mΩ12.74 μΩ0.6820.92
V2N1/235.06 μV Hz−1/235.06 nV Hz−1/20.101.79
V2SQ1/2388.0 nV Hz−1/21.164 nV Hz−1/20.300.00
1/Mi306.3 nA/Φ00.9034 nA/Φ00.3015.55
1/Mf43.59 μA/Φ0255.0 nA/Φ00.5861.14
Rf10 kΩ5.774 Ω0.060.60
Tg16.34 μK1.887 μK11.550.01
T20 mK299.2 μK1.53