Electromagnetic induction structure for locally heating tin source in superconducting cavity

Abstract

The invention discloses an electromagnetic induction structure for locally heating a tin source in a superconducting cavity. The electromagnetic induction structure comprises the superconducting cavity with a plurality of acceleration units, an electromagnetic induction heating coil, a tin source crucible, a supporting straight rod and a temperature thermocouple. The superconducting cavity is of a substrate structure for Nb3Sn film growth; one end of the electromagnetic induction heating coil is connected with the positive electrode of an alternating power supply, the other end of the electromagnetic induction heating coil is connected with the negative electrode of the alternating power supply, and the electromagnetic induction heating coil is used for heating the tin source placed in the coil; one tin source crucible is placed in each acceleration unit of the superconducting cavity, and the tin source crucible is a container for containing tin metal particles; the supporting straight rod is used as a supporting structure of the tin source crucible; and the temperature thermocouple is used for measuring the temperature in the superconducting cavity. According to the electromagnetic induction structure for locally heating the tin source in the superconducting cavity, local heating can be carried out on a plurality of tin sources in the superconducting cavity of the multiple acceleration units, and independent temperature control of the superconducting cavity and the tin sources is realized in each acceleration unit, so that each acceleration unit has the same'superconducting cavity-tin source 'temperature combination.

Description

technical field [0001] The invention relates to an electromagnetic induction structure for locally heating a tin source inside a superconducting cavity, and belongs to the technical field of superconducting. Background technique [0002] Nb 3 Sn thin film superconducting cavity is the key technology of the next generation of radio frequency superconductivity, and its engineering application will cause a technological revolution in the field of radio frequency superconductivity. Tin vapor diffusion method At a high temperature above 930°C, Sn atoms reach the inner surface of the superconducting cavity in the form of vapor, and react with Nb atoms in situ to form pure, high-quality Nb 3 Sn film. The temperature of the tin source determines the size of the saturated vapor pressure of tin and the rate at which Sn molecules reach the inner surface of the superconducting cavity. The temperature of the superconducting cavity determines the diffusion of Sn molecules to the inner ...

AI Technical Summary

Problems solved by technology

In this structure, a tin source is placed inside each acceleration unit, and the tin source inside each acceleration unit is locally heated through a temperature control program, so that each acceleration unit has a suitable "superconducting cavity-tin source" temperature combination , so as to solve the problem that the multi-acceleration unit superconducting cavity cannot use the superconducting cavity and the tin source to control the temperature alone to develop high-performance Nb 3 Difficulties in Sn Thin Film Superconducting Cavities

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