Longitudinal impedance measurements of an RK-TBA induction accelerating gap

Author

Eylon, S. ; Henestroza, E. ; Kim, J.-S. ; Houck, T.L. ; Westenskow, G.A. ; Yu, S.S.

Author_Institution

Fusion & Accel. Res., San Diego, CA, USA

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3719

Abstract

Induction accelerating gap designs are being studied for Relativistic Klystron Two-Beam Accelerator (RK-TBA) applications. The accelerating gap has to satisfy the following major requirements: hold-off of the applied accelerating voltage pulse, low transverse impedance to limit beam breakup, low longitudinal impedance at the beam-modulation frequency to minimize power loss. Various gap geometries, materials and novel insulating techniques were explored to optimize the gap design. We report on the experimental effort to evaluate the RF properties of the accelerating gaps in a simple pillbox cavity structure. The experimental cavity setup was designed using the AMOS, MAFIA and URMEL numerical codes. Longitudinal impedance measurements above beam-tube cut-off frequency using a single-wire measuring system are presented

Keywords

accelerator RF systems; accelerator cavities; klystrons; linear accelerators; AMOS; MAFIA; RF properties; RK-TBA induction accelerating gap; Relativistic Klystron Two-Beam Accelerator; URMEL; applied accelerating voltage pulse; beam breakup; beam-modulation frequency; beam-tube cut-off frequency; induction accelerating gap designs; longitudinal impedance; longitudinal impedance measurements; pillbox cavity structure; single-wire measuring system; transverse impedance; Acceleration; Cutoff frequency; Design optimization; Geometry; Impedance measurement; Insulation; Klystrons; Low voltage; Particle beams; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753396

Filename

753396