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Author Zou, Peng ♦ Xiao, Liling ♦ Sun, Xiang ♦ Gai, Wei ♦ Wong, Thomas
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword MATERIALS SCIENCE ♦ PARTICLE ACCELERATORS ♦ ACCELERATION ♦ ACCELERATORS ♦ DIELECTRIC MATERIALS ♦ EFFICIENCY ♦ ELECTRIC FIELDS ♦ IMPEDANCE ♦ PHYSICS ♦ QUALITY FACTOR
Abstract One disadvantage of conventional iris-loaded accelerating structures is the high ratio of the peak surface electric field to the peak axial electric field useful for accelerating a beam. Typically this ratio E{sub s}/E{sub a}{>=}2. The high surface electric field relative to the accelerating gradient may prove to be a limitation for realizing technologies for very high gradient accelerators. In this article, we present a scheme that uses a hybrid dielectric and iris-loaded periodic structure to reduce E{sub s}/E{sub a} to near unity, while the shunt impedance per unit length r and the quality factor Q compare favorably with conventional metallic structures. The analysis based on MAFIA simulations of such structures shows that we can lower the peak surface electric field close to the accelerating gradient while maintaining high acceleration efficiency as measured by r/Q. Numerical examples of X-band hybrid accelerating structures are given. {copyright} 2001 American Institute of Physics.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-08-15
Publisher Department Argonne National Laboratory (ANL), Argonne, IL
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 90
Issue Number 4
Organization Argonne National Laboratory (ANL), Argonne, IL


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