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Graduate Student Seminar - 12/09/2016

"Wave-Breaking Radiation from a Laser-Wakefield Accelerator"

by Bo Miao

Friday, December 9, 2016 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Professor Howard Milchberg

Laser wakefield acceleration has the potential to become the next generation accelerator, which is capable of supporting fields in excess of GV/m. In the self-injection scenario, electrons injected from plasma wave breaking undergo violent acceleration to near the speed of light and generate intense broadband flash. Therefore, this radiation provides a spatial and temporal diagnostic of electron injection. We study the temporal duration, coherence and intensity of the flash by spectral interferometry (Si) and single-shot supercontinuum spectral interferometry (SSSI). Our measurement shows that the flash is a coherent, ultrashort and intense pulse. We also employ 2D particle-in-cell (PIC) simulation to illustrate the radiation mechanism.

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