High brightness betatron x-ray source driven by chirped laser pulses

被引：0
|
作者：
Mishra, S. [1 ,2 ]
Rao, B. S. [1 ,2 ]
Moorti, A. [1 ,2 ]
Chakera, J. A. [1 ,2 ]
机构：
[1] Raja Ramanna Ctr Adv Technol, Laser Plasma Div, Indore 452013, India
[2] Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, India
来源：
PHYSICS OF PLASMAS | 2024年 / 31卷 / 10期
关键词：
GENERATION; ACCELERATION; ELECTRONS;
D O I：
10.1063/5.0214213
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We demonstrate high brightness betatron x-ray generation from a chirped laser pulses driven plasma accelerator. It is shown that positively chirped laser pulse leads to the initiation and enhancement of collective oscillations of electrons inside plasma bubbles, due to associated pulse front tilt (PFT). The PFT causes transverse drift of the bubbles with respect to the laser axis, which results in high brightness x-ray generation. At an optimum chirp, enhanced x-ray emission of >108 photons/pulse/sr in 0.1% BW with a critical energy of similar to 18 keV was observed by a factor >2 in comparison to the case of no chirp. The role of collective oscillation in enhancing x-ray emission is also validated in the Geant4 simulations.
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页数：6
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