Radio frequency superconducting cavity with slit waveguide structure for superconducting accelerator

Abstract

The invention relates to a radio frequency superconducting cavity with a slot waveguide structure for a superconducting accelerator, which belongs to the technical field of accelerator physics. The radio frequency superconducting cavity comprises multiple oval spherical cavities, bundle tubes and alary slit waveguides, wherein the multiple oval spherical cavities are connected with one another inseries; both ends of the multiple oval spherical cavities which are connected with one another are the bundle tubes; each oval spherical cavity and the outer walls of the bundle tubes at the two endsare uniformly distributed with multiple slits along the circumferential direction; and the slits of each oval spherical cavity and the slits of the bundle tubes at the two ends are connected by the corresponding alary slit waveguides. The radio frequency superconducting cavity of the invention has super-high attenuation of a dipole module and a quadrupole module, so that ERL of GeV magnitude reaches the average current intensity of ampere magnitude; the radio frequency superconducting cavity can reach a BBU threshold value over the ampere magnitude; the radio frequency superconducting cavity can be formed by punching at one time due to no weld joint in a high electric field; therefore, machining difficulty is greatly reduced, time and cost for product production are reduced, the products are suitable for mass production, and the production cost is reduced.

Description

technical field [0001] The invention relates to a radio frequency superconducting cavity with a slit waveguide structure used for a superconducting accelerator, and belongs to the technical field of accelerator physics. Background technique [0002] At present, β=1 superconducting cavities for accelerating electrons in the world generally use ellipsoidal cavities, such as Tesla (TESLA) superconducting cavities, low loss (Low loss) superconducting cavities and reentrant superconducting cavities. These superconducting cavities can increase the allowable acceleration current intensity by appropriately increasing the beam aperture of the cavity. However, due to the limitation of the structure, the maximum flow intensity of the current ordinary superconducting cavity can only reach the order of 100mA in the energy recovery accelerator (hereinafter referred to as ERL) of the final energy of GeV level, such as the KEK-ERL model of Japan KEK -2 superconducting cavity [T.Furuya et a...

AI Technical Summary

Problems solved by technology

For ordinary high-average-current-intensity superconducting cavities, the attenuation of high-order modes is outside the beam tube at both ends of the superconducting cavity, so its absorption of high-order modes is relatively weak, and can only reach the BBU threshold of the order of 100mA

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