Fig. 7

Heat lift margin of the dilution cooler as a function of dilution temperature and helium flow, with the dilution cooler control unit at 19 °C. For operation in flight at 101 mK, 115 nW is available to accommodate the heating from cosmic rays and for temperature regulation even at the lowest flow (Fmin2 = 19.8 μmol -1) used in flight (see Table 3 and Sect. 4.4).
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