"Enhancement of laser-driven betatron radiation in IOP/SJTU"

 

 

 

Betatron radiation is a highly collimated laser-driven hard x-ray source with fs duration which generated by electron transversely oscillation during acceleration in underdense plasmas. However, yield of this source is limited by controdictory between parameters during electron acceleration. Dr. Chen will present recent progress in enhancing acceleration to enrich the x-ray photon yield. 1) A new method is demonstrated for generating intense betatron x-rays using a clustering gas target, with yield enhancement of 40 times because of the DLA mechanism.  2) Another concept of generation of bright betatron radiation is oscillation injection of two electron beams. The first beam is a mono-energetic electron bunch, and the second one is injected continuously with high energy, large charge and large oscillation amplitude during acceleration. 3) The enhancement of resonant oscillation of the ionization injected electron bunch which results in the betatron radiation would lead to g-ray photon energy and peak brilliance beyond that of 3^rd generation synchrotron facilities.