Patent ID: 7397206
Filing Date: 2008-07-08
Classification: H05H

Abstract:
1. A phase switch for coupling to a standing wave electron linear accelerator via a side coupling structure, said accelerator including a plurality of accelerating cavities arranged parallel in a line, said phase switch disposed between a predetermined set of two adjacent accelerating cavities in said plurality of accelerating cavities, wherein: said phase switch being composed by a tri-cavity system and a separate single coupling cavity; said phase switch operating in normal status and inversion status, when in normal status, said tri-cavity system being deresonated while said single couple cavity being in operation status, the fields in the two accelerating cavities coupling previously and next to said phase switch both being accelerating fields; when in inversion status, only said tri-cavity system being in operation status, the field in the accelerating cavity coupling previously to said phase switch being an accelerating field while the field in the accelerating cavity coupling next to said phase switch being an decelerating field; when the switch switching between the two status, the field intensity of the accelerating cavity coupling next to said phase switch has a phase change of π; and wherein said single coupling cavity further comprising a deresonance part for deresonance, and a first coupling slot and a second coupling slot respectively coupling to said two adjacent accelerating cavities of the electron accelerator.