%0 Journal Article
%T Radio Frequency Quadrupole for Bunching Electron Beam: Electromagnetic Field, Particle Velocity Range, and Accuracy at 10 GHz
%A Serigne Bira Gueye
%J Journal of Electromagnetic Analysis and Applications
%P 1-11
%@ 1942-0749
%D 2023
%I Scientific Research Publishing
%R 10.4236/jemaa.2023.151001
%X The Radio Frequency Quadrupole (RFQ) accelerator invented by Kapchinskii and Tepliakov can focus, bunch, and accelerate charged-particle beams simultaneously. Typically, it operates at frequencies up to 500 MHz, for low particle velocities (&nbsp;<span style=\"white-space:nowrap;\"><em>¦Â</em> &lt; 0.12&nbsp;</span>). The first attempt to design cylindrical RFQ for electrons in the GHz region was done using 3 GHz at Frascati in 1990. In this paper, an analytical approximation of the electromagnetic field is given, and linearized in the beam region for a rectangular Electron Radio Frequency Quadrupole (ERFQ). The differences between the proton-RFQ and the electron-RFQ are discussed. Then, it will be shown that contrary to the quadrupoles for protons or heavy-ions, the ERFQ is suited for electron velocities in the range 0.5 - 0.7 <em>c</em>, and possible applications are given. Finally, it is illustrated, with numerical field computations that this approach gives sufficient accuracy at 10 GHz.
%K Electron RF Quadrupole
%K Buncher
%K Linear Accelerator
%K Linac
%K Beam Injector
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=122609