講題:Laser and Plasma wakefield acceleration 摘要:Energetic particle beams are important tool in many application, from basic science to healthcare, also a crucial element to produce high quality X-ray radiation. Conventional accelerators are relative large, from 10 m to several km, due to material-breakdown-limited acceleration gradient and energy loss via synchrotron radiation. Size and cost of maintenance of conventional accelerator limit the extent of application for daily life. Wakefield accelerator driven by either high energy or high energy particle is a promising way to build a table-top accelerator. For example, GeV-scale electron bunch driven by laser pulses has been demonstrated by using cm long gas targets . As a contrast, it needs almost 100 m of conventional accelerator to reach this energy. In this talk, I will first introduce fundamental physic of wakefield accelerator and related experiment. In the end of discussion, a physical phenomenon called "collective deceleration" associated to the unique properties of laser-driven electron bunches will be studied by experiment and PIC simulation. |
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