Multi-lithium-ball-projectile accurate automatic supply system special for plasma fracturing protecting

Abstract

The invention discloses a multi-lithium-ball-projectile accurate automatic supply system for plasma fracturing protecting. According to the requirement for EAST Tokamak plasma fracturing relieving, only when a certain number of impurities need to be injected in a short time, relieving on plasma fracturing can be achieved, and accordingly damage on a Tokamak due to plasma fracturing is relieved. A novel impurity injection mode with projectile injection and high-pressure gas injection combined is provided, the multi-lithium-ball-projectile accurate automatic supply system is researched and developed, the success of the research signifies successful achieving of the novel impurity injection mode, and an effective tool is provided for carrying out plasma fracturing protecting research work on an EAST. The EAST is the first full-superconduction divertor device similar to an ITER in the world, a fracturing relieving experiment is carried out on the EAST, and experiment foundations, data references and accumulation can be provided for an ITER fusion device.

Description

technical field [0001] The invention relates to the fields of vacuum technology, precise rotation control technology and magnetic confinement fusion, in particular to a precise automatic replenishment system for multi-lithium ball projectiles dedicated to plasma rupture protection. Background technique [0002] In the tokamak discharge test, due to plasma control, magnetic fluid instability, impurities, high-energy escaping particles and other reasons, the rupture of the plasma is unavoidable. Especially in the main research content of realizing the steady-state operation of the tokamak fusion reactor—maintaining the discharge of the steady-state high-parameter plasma, the plasma rupture discharge will cause serious damage, such as the large thermal load of the first wall, the strong Mechanical stress, large escape current, etc., even cause serious damage to the target plate of the deflector, the first wall parts and even the device. Although the operating limits of differe...

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Problems solved by technology

[0003] Plasma rupture protection is mainly divided into two methods: active protection and passive protection. Active protection mainly controls the plasma discharge parameters through feedback control to make it run in the plasma safe area to avoid rupture; passive protection is mainly for those unavoidable The method adopted for the rupture of the plasma is to inject impurities into the plasma to alleviate the damage caused by the rupture. There are two main methods, one is projectile injection, the other is high-pressure gas injection, and the two impurity injection methods Each has its own advantages and disadvantages. For projectile injection, the projectile can be injected into the plasma core due to the dense material, but the structure of the currently used projectile injection system is relatively complicated and is imported from abroad; for high-pressure gas injection , the system required for this injection method is relatively simple, but due to the gas injection, due to the ionization effect, the impurity gas can only enter the plasma boundary area, and it is difficult to enter the plasma core area

[0004] In order to overcome the shortcomings of the complex projectile injection system and the high-pressure gas injection can only be injected into the plasma edge area, we have successfully developed a multi-projectile injection high-pressure gas propulsion system on the basis of the successful development of the high-pressure gas injection fast inflation valve (201110090285). Contains a set of quick inflation valve and a set of multi-lithium ball projectile injection accurate automatic replenishment system

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