Updated the model the latest log data with cooling prediction

• The radiative cooling is expected to be the dominant cooling mode.
• It will take ~3 more days to reach 123K. We don't need to wait for it.
• For more informative temp data, we need the temperature of the inner shield and the table.

• We know the cold head temp from the measurement. For the prediction, the constant cold head temp of 65K was assumed.
• The table temp was estimated using conductive cooling model + linear empirical dependence of the conductivity on the temp
• The constant specific heat of the silicon mass (0.71 J/K/g) was assumed. This may need to be updated.
• The radiative cooling is given from Stefan–Boltzmann law with the emissivity of 0.15 for both the shield and the mass.
   
• The conductive cooling of the test mass was estimated using: Wire diameter 0.017" (=0.43mm), 4 wires, length of ~10cm (guess), no thermal resistance at the clamps (-> upper limit of the conductive cooling)

Radiative cooling already gives us a good agreement with the measured temp evolution for the test mass. The conductive cooling is not significant and does not change the prediction.

Updated the plot with the new data (2021/7/21 12:30PM)