SUPERSONIC MOLECULAR BEAM INJECTING DEVICE

摘要

This device includes a molecular beam valve, a cold/hot precipitator and a magnetic shielding cylinder, wherein molecular beam valve is nested in cold/hot precipitator and precipitator is nested in magnetic shielding cylinder and molecular beam valve is fixed on flange connected to vacuum chamber of a fusion device, outlet of molecular beam valve has a lengthened Laval nozzle. The device solves technical problem that plasma feeding efficiency of existing supersonic gas injector is below 20% during operation of a high-performance Tokamak high confinement mode and constraint is poor; and an effect of applying device to existing large-scale superconducting Tokamak has shown: feeding efficiency reaches 40%; and a function of triggering a low constraint mode converted to a high constraint mode; and a function of mitigating instability of an edge localized mode, so heating load on wall surfaces of fusion device is reduced by 50%, thereby maintaining normal H-mode operation.

主权项

1. A supersonic molecular beam injecting device comprising a molecular beam valve, a cold/heat precipitator and a magnetic shielding cylinder, said molecular beam valve located in said cold/heat precipitator and said magnetic shielding cylinder in sequence from inside to outside, said molecular beam valve fixed on a flange which is connected to the vacuum chamber of a fusion device, the outlet of said molecular beam valve having a lengthened Laval nozzle, the injecting velocity of the supersonic molecular beam tuned by changing the temperature of said cold/heat precipitator.