Patent ID: 8952340
Filing Date: 2015-02-10
Classification: H01J

Abstract:
1. A high-frequency acceleration type ion acceleration and transportation apparatus having high energy precision that is a beamline after an ion beam is accelerated by a high-frequency acceleration-type acceleration system having an energy spread with respect to set beam energy, the high-frequency acceleration type ion acceleration and transportation apparatus having high energy precision comprising: an energy analysis deflection electromagnet; and a horizontal beam focusing element, wherein a double slit that is configured by an energy spread confining slit and an energy analysis slit is additionally disposed at a position at which energy dispersion and a beam size are to be appropriate, wherein the position is determined based on a condition of the energy analysis deflection electromagnet and the horizontal beam focusing element, and wherein the double slit performs energy separation and energy definition and decreases the energy spread of the ion beam by performing adjustment for a smaller energy spread while suppressing a decrease in the amount of a beam current so as to realize required energy precision.