Patent ID: 8111025
Filing Date: 2012-02-07
Classification: G01V,H01J,H05G,H05H

Abstract:
1. A charged particle accelerator, comprising: a source of charged particles; an accelerator body comprising: an output cell downstream of the accelerating cells to receive and output the accelerated charged particle beam; wherein: the buncher cell, the periodic cells, and the output cell further define a plurality of linearly arranged on-axis coupling cavities between respective cells; the buncher cell and a first periodic cell following the buncher cell are configured such that a field step ratio between the peak amplitude of an electric field in a first accelerating cell cavity and the peak amplitude of an electric field in the buncher cell cavity is greater than one (1), during operation; and a cell period ratio between a cell length from a center of one accelerating cavity to a center of next accelerating cavity, and half the free space wavelength of the accelerator body during operation, is less than one (1).