Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753396
