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Resistance of Pt injector as a function of injection current and temperature. The resistance of Pt is a reliable indicator of the local temperature of the area and it can be easily seen that an injection current of 600 uA (current density 2.8x1011 A/m2) at 2 K corresponds to the same local temperature as the injector in a helium bath of 25 K with an injection current of 50 μA (current density 2.3x1010 A/m2)
