Photocathode microwave electron gun

Abstract

The invention relates to a photocathode microwave electron gun, which comprises a plurality of acceleration cavities communicated mutually along the axis, a photocathode arranged on the axis of the acceleration cavity, a waveguide tube (102) communicated with the acceleration cavities, a cathode disc (121), and a vacuum cavity (131). The photocathode is contained in the center of the disc surfaceof the cathode disc (121), a plurality of vacuum channels (123) are formed in the positions, surrounding the center of the disc surface, of the cathode disc (121), and each vacuum channel (123) is communicated with the two sides of the disc surface of the cathode disc (121); and the vacuum cavity (131) and the acceleration cavities are connected with the two sides of the disc surface of the cathode disc (121) correspondingly and communicated with each other through the vacuum channel (123) in the cathode disc (121).

Description

technical field [0001] The invention relates to a photocathode microwave electron gun. The photocathode microwave electron gun is used to generate high-brightness electron beams. on the axis of the cavity; and a waveguide communicating with the accelerating cavity. Background technique [0002] One of the major trends in the development of scientific research today is to pay close attention to the evolution of material structure in non-equilibrium state and the coupling of advanced scientific research tools with multiple degrees of freedom. "A strong support for this scientific paradigm change. Ultrafast X-ray photon and electron probe devices, that is, X-ray free electron laser (XFEL) and ultrafast electron diffraction and imaging (UED / UEM) devices, have femtosecond-level pulse lengths and Angstrom-level wavelengths at the same time, and are capable of Directly observe the structure of matter on the scales of time, space, energy and momentum at the atomic level, and reali...

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