> Then, we started the test with coil-magnet actuation (1V, 0.33A)
Actually, we used two current sources, and each of which showed 1V, 0.33A, and they are connected in serial, so actually, it was 2V, 0.33A.
About the heating, I often checked the temperature of the cooler heads and walls of 8K and 80K shields, and found no meaningful changes even in the cooler head that connects to the WAB; that was around 16-15K.