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Interferometric Optical Signature of Electron Microbunching in Laser-driven Plasma Accelerators by Lumpkin, A. H.; LaBerge, M.; Rule, D. W.; Zgadzaj, R.; Hannasch, A.; Zarini, O.; Bowers, B.; Irman, A.; Couperus-Cabadag, J. P.; Debus, A.; Köhler, A.; Schramm, U.; Downer, M. C. is a scholarly article available to read on EtoBox.

What is Interferometric Optical Signature of Electron Microbunching in Laser-driven Plasma Accelerators about?

We report observations of coherent optical transition radiation interferometry (COTRI) patterns generated by microbunched ~200-MeV electrons as they emerge from a laser-plasma accelerator. The divergence of the microbunched portion of electrons, deduced by comparison to an analytical COTRI model, is ~6x smaller than the ~3 mrad ensemble beam divergence, while the radius of the microbunched beam, obtained from COTR images on the same shot, is < 3 microns. The combined results show that the microbunched distribution has estimated transverse normalized emittance ~0.5 mm mrad.

Author

Lumpkin, A. H.; LaBerge, M.; Rule, D. W.; Zgadzaj, R.; Hannasch, A.; Zarini, O.; Bowers, B.; Irman, A.; Couperus-Cabadag, J. P.; Debus, A.; Köhler, A.; Schramm, U.; Downer, M. C.

Published

2019

Language

EN