| 主权项 |
1. A method for operating a cryostat, comprising a vacuum container which houses a chamber containing at least one object to be cooled, the vacuum container having at least one hollow cold head turret which contains a neck tube which connects the chamber through the outer shell of the vacuum container to the area outside of the cryostat, the neck tube being geometrically configured in such a way that a cold head may be introduced, the cold head having a cold head stage via which a cryogenic working medium, which flows or drips through a heat pipe into an evaporator chamber during a condensation operation, may be cooled, and which is thermally conductively connected to the object to be cooled via a thermal contact surface, so that the cooled cryogenic working medium is able to absorb heat from the object to be cooled and transport it to the cold head stage via the heat pipe, wherein during a precooling phase the object to be cooled is precooled to a target temperature of the working range of the cryogenic working medium in which the heat pipe is able to operate efficiently, wherein for the precooling, a precisely fitting short circuit block with good thermal conductivity is inserted through the neck tube into the heat pipe, one free end of the short circuit block being thermally connected to a high-power cooling device, and its other end contacting the thermal contact surface, and in an intermediate phase the short circuit block is removed from the heat pipe after the target temperature is reached, and during an operating phase, heat is subsequently transmitted through the heat pipe during a condensation operation. |
