we have a pretty good set of position data

clear evidence that in recent weeks the Tower thermometer was reading higher and with more variation than the detector temperature (inferred from IbIs)

experimented with moving the source faster.

Data looks different after fast source moves. Trapped flux? or helium films?

TES behavior became confusing recently - different channels at different temperatures? Maybe helium films?

Performed partial warmup and cooldown in hope of removing helium. Now however detector seems too warm - only one channel (pA, the one with highest Tc) in transition.