Plasma window windowless seal-based liquid-state metal spallation neutron target device

Abstract

The invention discloses a plasma window windowless seal-based liquid-state metal spallation neutron target device. The liquid-state metal spallation neutron target device comprises a plasma window and a liquid-state metal target, wherein the plasma window is arranged at the front end of the liquid-state metal target; the liquid-state metal target further comprises a liquid container; a liquid-state metal target material is held in the liquid container; a high-pressure cavity, a heat exchanger and a liquid-state metal circulating pipeline are arranged in the liquid container; the high-pressure cavity is arranged on the top of the liquid container; an opening is formed in the center of the bottom of the high-pressure cavity; a particle beam is in contact with a part bombarded by the beam through the opening; the heat exchanger is arranged on the inner wall of the liquid container to discharge heat to the exterior; and the metal liquid circulates in the liquid container through the liquid-state metal circulating pipeline. According to the plasma window windowless seal-based liquid-state metal spallation neutron target device, windowless seal of the liquid-state metal target is realized; the beam loss of the particle beam in a passage of the plasma window is reduced; the gasification of the liquid-state metal is reduced; and the steam of the metal entering a vacuum pipeline is reduced.

Description

technical field [0001] The invention belongs to the field of nuclear technology and application, and in particular relates to a liquid metal spallation neutron target device based on plasma window and windowless sealing. Background technique [0002] Accelerator-driven subcritical system (ADS) uses high-current proton accelerators to bombard heavy metal targets to generate spallation neutrons, which provide external source neutrons for the subcritical reactor to drive the operation of the subcritical reactor. The spallation neutron target is the coupling part connecting the high-current medium-energy proton accelerator and the reactor in the ADS system, and its design becomes a key technical issue affecting the stable and safe operation of the ADS system. [0003] There are three main types of existing spallation neutron targets, which are solid targets, liquid targets with windows and liquid metal targets without windows. Solid target (R&D of a MW-class solid-target for a ...

AI Technical Summary

Problems solved by technology

However, since the upper surface of the part subjected to beam bombardment is a vacuum, the liquid surface of the liquid metal is a free liquid surface. This free liquid surface is unstable, and the liquid metal is easy to volatilize, so that the metal vapor enters the vacuum pipe through the vacuum chamber, causing corrosion. vacuum pipe

In the prior art, in order to prevent the volatilized metal vapor from entering the vacuum pipeline, the volatilized liquid metal is vacuumed. However, the effect of this vacuumed device is not ideal and the cost is expensive.

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