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A perpendicularity adjustment method for camera optical axis based on automatic partition focusing was proposed to improve the spatial positioning accuracy of monocular micro-vision for plate microstructure. The method combines high-precision focusing technology and focusing distance accurate measurement technology. Based on the focusing distance deviation of corresponding region and the center distance...
The sheet beam klystron (SBK) is characterized by a large rectangular drift tube, which allows the use of a high current, low voltage beam, resulting in a low beam current density, and hence high efficiency and the possibility of Periodic Permanent Magnet (PPM) focusing. Our research group has designed a 5-Cavity X-Band SBK recently. In this paper, we discusses the general design of this X-Band SBK...
In this paper, the development of W-band sheet beam klystron has been introduced with high transmission rate beam and a 2-dimensional code SBK2D calculation. The ellipse cathode and electrode structure is used to form the sheet electron beam with the beam aspect ratio about 25:1. And the uniform magnetic system is used to transport the sheet electron beam with the drift tube length about 100mm. After...
The transport of an elliptic sheet electron beam with uniform density in uniform magnetic field is investigated by making use of a macroscopic cold-fluid model. General envelope equations and beam twisted angles are derived. In particular, the tilt of the elliptic sheet beam was numerically calculated by an example of W-band sheet beam klystron.
In this paper, the ponderomotive focusing forces are derived for a sheet electron beam in both periodic cusped magnetic and wiggler magnetic field configurations, which has a large aspect ratio, using two-time scale analytical method.
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