Patent ID: 8947021
Filing Date: 2015-02-03
Classification: H05H

Abstract:
1. An accelerator comprising: an inflector through which a beam entering from an ion source passes and which introduces the beam to an acceleration orbit, wherein the inflector includes a beam convergence unit configured to converge the beam passing through the inflector, wherein the beam convergence unit generates a distorted quadrupole-component electric field in a beam passing area through which the beam passes, wherein the inflector includes positive and negative electrodes facing each other with a gap, which forms the beam passing area, therebetween, and the positive and negative electrodes are formed so that a width of the gap is not constant in a cross-section perpendicular to a traveling direction of the beam, wherein the acceleration orbit has a convoluted shape, and the width of the gap is increased toward a position corresponding to an outer side of the acceleration orbit, which has the convoluted shape, the cross-section perpendicular to the traveling direction of the beam.