Ускорение стабилизации температурного поля в криососуде

Abstract

A technique is proposed to accelerate, by 40-50 hours, the process of stabilization of temperature field in cryovessels with thermal superinsulation packet heat shielding after filling them with liquid nitrogen. This allows to reduce working area for thermal tests by ~20 %. For this sake, the neck is plugged toughly for 21 hours with an polystyrene insert having central channel to let cold nitrogen vapor out in order to isolate the walls and prevent undercooling of the thermal superinsulation layers. After this, common commercial polystyrene plug should be used with a spacing between it and the neck for venting the cold nitrogen vapor that provides good cooling the neck.