Fast electron measurement probe system suitable for magnetic confinement plasmas

Abstract

The invention discloses a fast electron measurement probe system suitable for magnetic confinement plasma. The fast electron measurement probe system comprises an insulating shell, a fast electron probe assembly, a Langmuir probe assembly and a ceramic base. The insulating shell is formed by processing high-temperature-resistant boron nitride, the ceramic base is made of machinable ceramic, a plurality of Langmuir probes are distributed at the front end of the probe system, and a plurality of fast electron probes are uniformly and symmetrically distributed on two side surfaces of the probe system and are used for collecting electron current. The fast electronic probe and the Langmuir probe respectively comprise a graphite probe, a copper binding post, a wire and the like, the graphite probes and the copper binding posts are connected through threads, the copper binding posts and the wire are connected through crimping pliers in a crimping mode, connection is reliable, and high temperature resistance is achieved. According to the fast electron probe, the radius of an electron Larmor in magnetic confinement plasma is far smaller than that of ions, and the ions can be effectively repelled by setting the width and the depth of a small hole to collect electrons. The system can work in a high-temperature environment in the magnetic confinement fusion device, and is stable in mechanical performance, reliable in signal, high in spatial resolution and small in occupied space.

Description

technical field [0001] The invention relates to the field of magnetically confined plasma diagnosis, in particular to a fast electron measuring probe system suitable for magnetically confined plasma. Background technique [0002] Magnetic confinement plasma is to use a special form of magnetic field to confine electrically quasi-neutral plasma in a specific space. It is mainly used in the field of magnetic confinement fusion, including fusion devices such as tokamak, stellarator, magnetic mirror and pinch. Its basic principle is to confine light nuclei (such as deuterium, tritium, etc.) in a limited volume of ultra-high temperature, undergo nuclear fusion reactions, and release energy through Einstein's mass-energy equation to generate electricity. Fusion energy is a clean energy because it does not produce nuclear waste that is difficult to handle, and it is also the main way to solve human energy problems in the future. According to the current research results, magnetic ...

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Problems solved by technology

When the type I boundary localized mode explodes, the particles and energy in the core confinement area will instantly cross the outermost closed magnetic surface and hit the divertor target plate and the first w

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