Title :
Dispersion in the presence of strong transverse wakefields
Author :
Assmann, Ralph W. ; Chao, Alex
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
To minimize emittance growth in a long linac, it is necessary to control the wakefields by correcting the beam orbit excursions. In addition, the particle energy is made to vary along the length of the bunch to introduce a damping, known as the BNS damping, to the beam break-up effect. In this paper, we use a two-particle model to examine the relative magnitudes of the various orbit and dispersion functions involved. The results are applied to calculate the effect of a closed orbit bump and a misaligned structure. It is shown that wake-induced dispersion is an important contribution to the beam dynamics in long linacs with strong wakefields like SLC
Keywords :
electron accelerators; particle beam bunching; particle beam dynamics; wakefield accelerators; BNS damping; SLC; beam break-up effect; beam dynamics; beam orbit excursion correction; bunch; closed orbit bump; dispersion functions; emittance growth minimization; long linac; misaligned structure; orbit functions; strong transverse wakefields; two-particle model; Acceleration; Chaos; Damping; Electrons; Equations; Frequency; Linear accelerators; Linear particle accelerator; Orbital calculations; Particle beams;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.750747
