Two examples of the monitored pressure and temperatures in the chamber for two samples with 25 vol% water ice, each. The recordings were made every second from the beginning of the experiment to its end. Panel A: the insolation with ~ 3 solar constants was vertical from above. When the sublimation activity of the sample stopped after about 3 h, the pressure and temperatures remained stable until the end of the experiment. Panel B: the insolation was horizontal from the side. The temperatures of the sample and setup remained approximately stable. The pressure curve shows two short-term increases after 3 and 5.5 h, which can be attributed to two collapse events on the sample. The sample temperature increased at ~ 0.5 h after the remainder of liquid nitrogen vaporized from the sample.