  Particle beams with highly asymmetric emittance ratios are expected at the
interaction point of high energy colliders. These asymmetric beams can be used
to drive high gradient wakefields in dielectrics and plasma. In the case of
plasma, the high aspect ratio of the drive beam creates a transversely
elliptical blowout cavity and the asymmetry in the ion column creates
asymmetric focusing in the two transverse planes. The ellipticity of the
blowout depends on the ellipticity and normalized charge density of the beam.
In this paper, simulations are performed to investigate the ellipticity of the
wakefield based on the initial driver beam parameters. The matching conditions
for this elliptical cavity are discussed. Example cases for employment using
the attainable parameter space at the AWA and FACET facilities are also
presented.
