The method of forced convection cooling and super flow helium cooling in the cooling water machine of the magnet and the container is gradually increasing.
The large superconducting magnet is often used in the section cooling. But first with the cooling liquid helium cooling, but also the use of gas refrigerator cooling.
This cooling method can not only save a lot of expensive liquid helium, and the gradually cooling can reduce the cooling temperature difference of the magnet and the container to ensure
The local structure is not destroyed due to the temperature stress of the large fan of the industry. At the same time, in order to make full use of the cold gas, the amount of cold gas will often be Guan Shen
.
To the lower part of the magnet, the magnet is fully cooled, and then the infusion tube is raised to fill the liquid. Something will be done in the infusion tube section of the tube, that is, the pre cooling
The transfusion pipe is communicated with the lower infusion pipe, and the upper and lower infusion tubes of the tank is separated.
Safety problem is mainly reflected in two aspects: the safety of the superconducting magnet, the magnet is lost and the vacuum is destroyed. These two kinds of circumstances
Will cause released a lot of energy and a lot of heat leakage into, causing looked at the liquid helium suddenly gasification, the pressure inside the container is rising fast
. Therefore, in the design of Wabi Du thick these factors should be considered. At the same time, for the loss as soon as possible to try out the energy extraction, liquid helium will be fast
Quick release, should be set up to monitor the original loss of the original and discharge device. Commonly used in the protection of the law will have a series of resistance protection method, the shock circuit protection
And transformer protection, etc.. Vacuum indicator and inner and outer casing.