A high power input coupler

Abstract

The invention discloses a high-power input coupler. The high-power input coupler comprises a T-type tuning device, an input end and a short-circuit end of the T-type tuning device are located on an identical axis, and the axis of an output end is perpendicular to the axis of the input end. The output end is connected with a coaxial cable through a high-frequency form. The T-type tuning device is of a double-conductor structure and comprises an inner layer conductor box and an outer layer conductor box which are insulated from each other. An input port of the inner layer conductor box is in sealing electrical connection with an inner conductor of a coaxial cable at the input end, a short-circuit port of the inner layer conductor box is in sealing electrical connection with an inner conductor of a coaxial cable at the short-circuit end, and an output port of the inner layer conductor box is in sealing electrical connection with an inner conductor of a coaxial cable at the output end. An input port of the outer layer conductor box is in sealing electrical connection with an outer conductor of a coaxial cable at the input end, a short-circuit port of the outer layer conductor box is in sealing electrical connection with an outer conductor of a coaxial cable at the short-circuit end, and an output port of the outer layer conductor box is in sealing electrical connection with an outer conductor of a coaxial cable at the output end. A short-circuit piston is arranged between the inner conductor of the coaxial cable at the short-circuit end and the outer conductor of the coaxial cable at the short-circuit end. The high-power input coupler can achieve on-line adjusting of power transmission.

Description

technical field [0001] The invention relates to a high-power input coupler, which belongs to the microwave field. Background technique [0002] The high-power input coupler is essentially a microwave transmission element. It is one of the key components of the radio frequency superconducting system of the particle accelerator. It is located between the power source and the superconducting cavity in the radio frequency superconducting system. Its main function is to transmit microwave Power is fed into the superconducting cavity (see attached figure 1 ), and also use the ceramic window to isolate the atmosphere from the ultra-high vacuum environment, and undertake multiple functions such as the low-leakage heat transition connection from room temperature to superconducting low temperature. [0003] According to operating experience, the high-power input coupler is one of the most fragile key components in the RF superconducting system. Once damaged, the entire accelerator wi...

AI Technical Summary

Problems solved by technology

However, no matter what type of structure the power input coupler is, it is necessary to connect the power source to the main transmission line of the coupler, the structural design of the connector, or the door button conversion structure [Document 1, Mircea Stirbet, Fundamental PowerCouplers for the SNS Project, review of the SPL RF coupler CERN16-17March2010], or adopt a direct connection structure [Document 2, Q.S.Shu, J.Susta, G.F.Chen et all. "INNOVATIVE MODULAR, MULTIPLE POWER LEVELS, 325MHz SPOKES CAVITIES POWER COUPLERS", Proceedings of PAC07, New Mexico, USA], that is, the power is transmitted to the coupling device without reflection as much as possible, but both of them fail to realize the online adjustment of the transmission performance, that is, in the case of feeding power, through the short-circuit tuning of the coupler The controller is adjusted to achieve power matching transmission and further improve power transmission efficiency

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