A superconducting cyclotron vacuum exhaust system

Abstract

The invention relates to a vacuum exhaust system of a superconducting cyclotron. The vacuum exhaust system comprises a first exhaust passage, a second exhaust passage and a third exhaust passage, wherein the first exhaust passage is arranged in a high-frequency inner rod (7) of a high-frequency system of the superconducting cyclotron; the second exhaust passage is arranged between the high-frequency inner rod (7) of the high-frequency system and a high-frequency outer conductor (4); the third exhaust passage is arranged between the high-frequency outer conductor (4) of the superconducting cyclotron and a main magnet cover plate (2); and the first exhaust passage, the second exhaust passage and the third exhaust passage all carry out exhausting through a D plate (5) arranged at the end part of the high-frequency inner rod (7). By the vacuum exhaust system of the superconducting cyclotron, a plurality of vacuum exhaust passages are arranged according to the structural design characteristic of the high-frequency system, so that conductance of vacuum exhausting of the superconducting cyclotron is improved; the vacuum pumping rate of the superconducting cyclotron is improved; the beam loss is reduced; and the beam quality is improved.

Description

technical field [0001] The invention belongs to the field of particle acceleration, and in particular relates to a superconducting cyclotron vacuum exhaust system. Background technique [0002] The vacuum system is one of the basic components of a superconducting cyclotron. Particles orbit in the vacuum chamber of the superconducting cyclotron, and when they pass through the acceleration gap, they gain energy and are accelerated. According to the characteristics of the superconducting cyclotron itself, all the main magnet valleys of the superconducting cyclotron are used by the feed-in and coupling devices of the high-frequency system, and the vacuum acquisition equipment can only use the feed-in and coupling of the high-frequency system in the main magnet valley. Vacuum exhaust the acceleration chamber in the gap of the area. At present, the general vacuum exhaust channel of this type of superconducting cyclotron uses the space inside the high-frequency inner rod for vacuu...

AI Technical Summary

Problems solved by technology

At present, the general vacuum exhaust channel of this type of superconducting cyclotron uses the space inside the high-frequency inner rod for vacuum exhaust. The inner space of the high-frequency inner rod is limited, resulting in limited conductance of the vacuum exhaust channel. The effective pumping speed is small, which leads to low vacuum in the superconducting cyclotron acceleration chamber of the internal ion source, high-frequency system ignition and multi-electron effects, and low beam acceleration and transmission efficiency.

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