Multipacting Simulation Study for 56 MHz Quarter Wave Resonator using 2D Code

Naik,D. ; Ben-Zvi, I.

Brookhaven National Laboratory

关键词: Cavity Resonators;    43 Particle Accelerators;    Computerized Simulation;    Beam Bunching;    Beam Luminosity;   

DOI  :  10.2172/946779
RP-ID  :  BNL--81971-2009-IR
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  946779

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来源: UNT Digital Library

【 摘 要 】

A beam excited 56 MHz Radio Frequency (RF) Niobium Quarter Wave Resonator (QWR) has been proposed to enhance RHIC beam luminosity and bunching. Being a RF cavity, multipacting is expected; therefore an extensive study was carried out with the Multipac 2.1 2D simulation code. The study revealed that multipacting occurs in various bands up to peak surface electric field 50 kV/m and is concentrated mostly above the beam gap and on the outer conductor. To suppress multipacting, a ripple structure was introduced to the outer conductor and the phenomenon was successfully eliminated from the cavity.