Tongpu Yu

Abstract Phase-space control of positron beams is essential for compact, high brightness positron sources, yet efficient capture and early stage acceleration remain challenging. Here we propose and numerically investigate a surface-plasmon driven wakefield scheme in a dense plasma micro-tube, in which wakefield excitation is sustained by the oscillation of a nanometric electron layer at the inner wall.

Abstract Recent progress on betatron X-ray source enables the exploration of new physics in fundamental science; however, the application range is still limited by the source flux and brightness. In this Letter, we show the generation of more than 1 × 1012 photons (energy > 1 keV) with a peak brightness of 7.8 × 1022 photons/(s mm2 mrad2) at 0.1% bandwidth (BW) at 10 keV, driven by a femtosecond laser pulse of ≈5.5 J and a sub-critical density plasma (SCDP).