Title :
Damping of higher-order modes in a threefold symmetry accelerating structure
Author :
Yu, D. ; Kroll, N.
Author_Institution :
DULY Consultants, Rancho Palos Verdes, CA, USA
Abstract :
An investigation is conducted of a waveguide-coupled damping structure with threefold symmetry using the 2-D and 3-D MAFIA codes. Within the frequency range considered, all higher-order modes except the TM011 and TE111 modes are heavily damped. Possible ways to detrap these by using asymmetric waveguides offset with respect to the accelerating cavity in the direction of the beam are studied. External Q and resonant frequencies are calculated using recently developed computer methods.<>
Keywords :
beam handling equipment; particle accelerators; particle beam diagnostics; physics computing; MAFIA codes; asymmetric waveguides; external Q frequencies; higher-order modes; resonant frequencies; threefold symmetry accelerating structure; waveguide-coupled damping structure; Acceleration; Couplers; Couplings; Cutoff frequency; Damping; Loaded waveguides; Particle beams; Resonance; Resonant frequency; Waveguide theory;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164755
