A High-Efficiency Resonant Cavity for Measurement of a Beam Quadrupole Moment

Barov, N. ; Kim, J. S. ; Nantista, C. D. ; Miller, R. H.

Stanford Linear Accelerator Center

关键词: Bypasses;    Cavities;    43 Particle Accelerators;    Geometry;    Accelerators;   

DOI  :  10.2172/878032
RP-ID  :  SLAC-PUB-11540
RP-ID  :  AC02-76SF00515
RP-ID  :  878032

美国|英语

来源: UNT Digital Library

【 摘 要 】

Many particle accelerator applications can benefit from online pulse-by-pulse nonintercepting emittance measurement system. Recently, there has been much interest in performing such a measurement with a set of resonant quadrupole-mode cavities. This article explores a geometry to achieve an enhanced shunt impedance in such a cavity by adding a set of posts forming capacitive gaps near the beam pipe outer radius. For typical diagnostic cavity applications, a five-fold increase in shunt impedance can be obtained with this method. The effect of errors in cavity fabrication on the required mode structure are explored.