Figure 8
(a) Response of the temperature regulation system to a 4 K step at cryogenic temperatures (PID parameters are not fully optimized). (b) Stability of the sample temperature over a 10 h time period. (c, d) Fluorescence images of a Cr dot, T = 800 K, photon energy = 11.95 keV, pixel size = 160 nm. The time delay between data shown in (c) and (d) equals 1560 s. |