Cerenkov radiation from a magnetized plasma: a diagnostic for PBWA experiments

P. Muggli, J. Yoshii, T.C. Katsouleas, C.E. Clayton, C. Joshi
Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)  
In the plasma beat wave acceleration scheme, the ponderomotive force of a two-frequency laser pulse resonantly drives a large amplitude (E es ≈3 GV/m) relativistic electrostatic plasma wave. The electro-static (es) wave does not couple to the vacuum modes and its energy is dissipated in the plasma. With a static magnetic field B 0 z applied perpendicularly to the laser beam propagation axis x, the two-frequency laser pulse couples to the L branch of the XO mode of the magnetized plasma through
more » ... zed plasma through Cerenkov radiation. The electromagnetic component (em) of the XO mode couples to the vacuum mode. The plasma wave is not affected by the transverse magnetic field, and measuring the characteristic of the emitted radiation thus provides an in-situ diagnostic for the beat-wave-excited accelerating structure (amplitude, phase, and damping for example). Additionally, the mechanism of interest is a possible source for a gigawatt terahertz radiation source.
doi:10.1109/pac.1999.792401 fatcat:n5brft6cpvfkzml55hbmsuexu4