HEM sub 11 modes revisited

Conference · Sat Sep 01 04:00:00 EDT 1990

OSTI ID:6559131

Wang, J W; Loew, G A

Concern with emittance growth in future multi-bunch linear colliders has rekindled interest in HEM{sub 11} dipole modes (sometimes also called TM{sub 11}-like'' or TE{sub 11}-like'') in disk-loaded waveguides. The availability of modern computer codes (URMEL, MAFIA) makes it possible to gain a deeper understanding of these modes and their properties. This paper presents {omega}-{beta} dispersion diagrams, field configurations and transverse shunt impedances for the HEM{sub 11} modes as a function of iris aperture. The transition between forward and backward waves of the various branches is explored. This information serves as background material for another paper at this conference which reports recent work on linac structures in which these modes are damped or detuned. 5 refs., 3 figs., 1 tab.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6559131
• Report Number(s): SLAC-PUB-5321; CONF-9009123--37; ON: DE91001028
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ACCELERATORS
BEAM BUNCHING
BEAM DYNAMICS
BEAM EMITTANCE
DIPOLES
ELECTROMAGNETIC FIELDS
LINEAR ACCELERATORS
LINEAR COLLIDERS
LINEAR MOMENTUM
MULTIPOLES
OSCILLATION MODES
TRANSVERSE MOMENTUM
WAVE PROPAGATION
WAVEGUIDES