Title :
Superconducting RF linear collider
Author :
Rubin, D.L. ; Graber, J. ; Hartung, W. ; Kirchgessner, J. ; Moffat, D. ; Padamsee, H. ; Sears, J. ; Shu, Q.S.
Author_Institution :
Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Abstract :
A simulation is used to investigate the dependence of stability thresholds on the HOM (higher-order-mode) damping. The emittance growth and energy spread due to high-Q parasitic modes is computed as a function of bunch charge, loaded Q, and mode bandwidth. The HOM loading typical of a five-cell cavity with a pair of beam tube couplers is considered. It is found that a beam with bunch charge of 2×1010 particles and bunch spacing of 100 ns accelerated to high energy in such a structure exhibits tolerable emittance growth. It is suggested that a 3-GHz superconducting linac can be incorporated very simply into a design for a high energy linear collider
Keywords :
beam handling equipment; beam handling techniques; linear accelerators; beam tube couplers; bunch charge; bunch spacing; emittance growth; energy spread; five-cell cavity; high energy linear collider; high-Q parasitic modes; higher-order-mode damping; loaded Q; mode bandwidth; stability thresholds; superconducting linac; Acceleration; Costs; Couplers; Damping; Feeds; Linear particle accelerator; Particle beams; Radio frequency; Resonant frequency; Stability;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73233
