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Ultrasonic molecular beam injection device

An injection device and molecular beam technology, applied in the field of nuclear fusion, can solve the problems of plasma feeding efficiency lower than 20%, poor confinement, etc.

Active Publication Date: 2013-11-27
SOUTHWESTERN INST OF PHYSICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] The technical problem to be solved in the present invention is: the plasma feeding efficiency of the existing ultrasonic gas injector is lower than 20% and the confinement is not good in the high-performance tokamak high-constraint mode operation

Method used

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Embodiment Construction

[0027] Such as figure 1 As shown, the ultrasonic molecular beam injection device of the present invention includes: a molecular beam valve 9 , a cold / hot trap heat sink 7 and a magnetic shielding cylinder 5 . Among them, the outlet of the molecular beam valve 9 is provided with an extended Laval nozzle 8, and the molecular beam valve 9 is sequentially nested in the cold / hot sink heat sink 7 and the magnetic shielding tube 5 from the inside to the outside, and is fixed in the fusion On the flange 12 connected to the vacuum chamber of the device.

[0028] The air inlet of the molecular beam valve 9 is connected with the high-pressure gas source through a high-pressure sealing joint; its outlet is provided with an extended Laval nozzle 8, and the aperture of the molecular beam valve 9 outlet is equal to the aperture of the extended Laval nozzle 8 , and are on the same axis. In this embodiment, the outlet aperture of the molecular beam valve 9 has various specifications, ranging...

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Abstract

The invention belongs to the technical field of nuclear fusion, and particularly relates to an ultrasonic molecular beam injection device. The device comprises a molecular beam valve, a cold / hot trap heat sink and a magnetic shielding barrel, the molecular valve is embedded in the cold / hot sink and the magnetic shielding barrel in a sleeved mode from interior to exterior and fixed on a flange connected with a vacuum chamber of a fusion device, and a lengthened Laval spraying nozzle is arranged on an outlet of the molecular beam valve. The device solves the technical problems that plasma heating efficiency is lower than 20% and restrain is not good enough when an existing ultrasonic gas injection device operates in a high-performance Tokamak high restraint mode. The application effect of the device applied in an existing large superconductivity Tokamak is displayed: the heating efficiency reaches 40%, and the function for triggering a low-restraint mode to be converted to a high-restraint mode (L-H) is achieved. The device has the function of reducing instability of an edge local mode and enables thermal loads on the surface of the wall of the device to be reduced by 50%, and therefore normal state operation of an H mode can be maintained.

Description

technical field [0001] The invention belongs to the technical field of nuclear fusion, and in particular relates to an ultrasonic molecular beam injection device. Background technique [0002] Ultrasonic molecular beam injection is a new method of nuclear fusion feeding developed on the basis of conventional jet technology. [0003] In the invention patent "ultrasonic gas or cluster injector" (ZL10105647.1), an ultrasonic gas injection device is disclosed, whose main advantage is that it can double the feeding efficiency. Taking the fuel gas deuterium as an example, the ultrasonic gas injection The feeding efficiency is 30 to 60%, while the efficiency of conventional jet feeding is only 15 to 30%. Ultrasonic gas-fed particles have the potential to enter the plasma confinement. Therefore, it is beneficial for increasing the density and density peaking of plasma and improving energy confinement. These results were mainly achieved on the smaller scale (R=1.02m, a=0.20m) toka...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21B1/15
CPCY02E30/16G21B1/15Y02E30/10
Inventor 姚良骅冯北滨陈程远
Owner SOUTHWESTERN INST OF PHYSICS
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