Cryogenic target low-temperature adsorption inhibition opening mechanism

Abstract

The invention discloses a cryogenic target low-temperature adsorption inhibition opening mechanism, which is used for quickly and directly exposing a cryogenic target before laser is injected into a target point. The mechanism comprises a motor driving unit, a screw rod transmission mechanism and a front protection part. The motor driving unit is arranged on a cantilever base and comprises a driving motor; the screw rod transmission mechanism is mounted on the cantilever base, comprises a moving frame, and is used for converting the rotation of the driving motor into the forward and backward linear motion of the moving frame; and the front protection part comprises a low-temperature movable screen and a normal-temperature movable screen which are sequentially arranged from inside to outside and are provided with openings in the front ends, and a low-temperature fixed screen and a normal-temperature fixed screen which have cold conduction and guide effects. According to the cryogenic target low-temperature adsorption inhibition opening mechanism, the low-temperature movable screen and the normal-temperature movable screen have a telescopic function, namely, the cryogenic target is effectively protected, foreign gas and organic substances are prevented from being frozen and adsorbed to the surface of the target, and the cryogenic target can be quickly and directly exposed in a vacuum cavity environment as required.

Description

technical field [0001] The invention belongs to the technical field of inertial confinement fusion, and in particular relates to an adsorption suppression mechanism of a cryogenic target. Background technique [0002] Inertial confinement fusion is an effective way to realize controllable thermonuclear fusion, an effective way to explore new energy sources, and also a technological strategic commanding height that developed countries are vying to occupy. It has great practical and strategic significance. Compared with conventional targets, the number of neutrons produced by fusion of cryogenic targets has increased significantly, and it is the most promising target type to achieve fusion first. However, the realization of its goal requires specific extreme physical conditions: the cryogenic target needs to be kept at an ultra-low temperature below 18K to ensure that the target is in a frozen state, and its temperature needs to be stable. [0003] It should be noted that, in...

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Problems solved by technology

[0011] In order to solve the problem that the thermal radiation shield needs to be opened and closed quickly in a limited space and keep the low temperature stably during the shooting process of the cryogenic target, the present invention provides a shield that can open the normal temperature shield and the low temperature shield at the same time to realize deep cooling. Local rapid exposure of cold target target for laser targeting cryogenic target low temperature adsorption inhibition opening mechanism

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