A hybrid dielectric and iris loaded periodic accelerating structure.

Conference · Tue Jul 17 04:00:00 EDT 2001

DOI:https://doi.org/10.1063/1.1383578· OSTI ID:783658

Zou, P; Xiao, L; Sun, X; Gai, W

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} {ge} 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 paper, 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.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 783658
• Report Number(s): ANL-HEP-CP-01-64
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
ACCELERATORS
COMPUTERIZED SIMULATION
DIELECTRIC MATERIALS
EFFICIENCY
ELECTRIC FIELDS
HYBRID SYSTEMS
IMPEDANCE
PARTICLE BEAMS
QUALITY FACTOR