CERN Accelerating science

Article
Title	Rectangular Dielectric-Lined Two-Beam Wakefield Accelerator Structure
Author(s)	Wang, Changbiao ; Hirshfield, Jay L ; Marshall, Thomas C ; Yakovlev, Vyacheslav P
Affiliation	(Columbia University, New York) ; (Omega-P, Inc., New Haven, Connecticut) ; (Omega-P, Inc., New Haven, Connecticut; Yale University, New Haven, CT)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1333
Subject category	Accelerators and Storage Rings
Abstract	A novel dielectric structure is described for a two-beam wake field accelerator (WFA), which consists of three or four rectangular dielectric slabs positioned within a rectangular conducting pipe. This structure can be thought of as equivalent to two symmetric dielectric-lined three-zone rectangular waveguides, joined side-by-side. The design mode in the two-beam structure is the LSM-31 mode, a combination of two symmetric LSM-11 modes of the two three-zone waveguides. This two-channel mode can be employed to decelerate drive particles in one channel and accelerate test particles in the other. It is possible to find structure parameters that give a high ratio of acceleration gradient for the test beam, to deceleration gradient for the drive beam, of the order of 100.