Low-energy-spread laser wakefield acceleration using ionization injection with a tightly focused laser in a mismatched plasma channel

NCU Institutional Repository > 理學院 > 物理學系 > 期刊論文 > Item 987654321/105153

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/105153

题名:	Low-energy-spread laser wakefield acceleration using ionization injection with a tightly focused laser in a mismatched plasma channel
作者:	白植豪;Li, F;Zhang, C J;Wan, Y;Wu, Y P;Xu, X L;Hua, J F;Pai, C H;Lu, W;Gu, Y Q;Mori, W B;Joshi, C
贡献者:	理學院物理學系
关键词:	Acceleration;Channels;Computer simulation;Electron beams;energy spread;injection distance;Ionization;ionization injection;laser wakefield acceleration;Lasers;Mathematical models;Plasma (physics);plasma channel
日期:	2016-01-22
上传时间:	2026-04-23 12:08:39 (UTC+8)
出版者:	IOP Publishing Ltd.;United Kingdom: IOP Publishing
摘要:	摘要： An improved ionization injection scheme for laser wakefield acceleration using a tightly focused laser pulse, with intensity near the ionization threshold to trigger the injection in a mismatched plasma channel, has been proposed and examined via 3D particle-in-cell (PIC) simulations. In this scheme, the key to achieving a very low energy spread is shortening the injection distance through the fast diffraction of the tightly focused laser. Furthermore, the oscillation of the laser envelope in the mismatched plasma channel can induce multiple low-energy-spread injections with an even distribution in both space and energy. The envelope oscillation can also significantly enhance the energy gain of the injected beams compared to the standard non-evolving wake scenario due to the rephasing between the electron beam and the laser wake. A theoretical model has been derived to precisely predict the injection distance, the ionization degree of injection atoms/ions, the electron yield as well as the ionized charge for given laser-plasma parameters, and such expressions can be directly utilized for optimizing the quality of the injected beam. Through 3D PIC simulations, we show that an injection distance as short as tens of microns can be achieved, which leads to ultrashort fs, few pC electron bunches with a narrow absolute energy spread around 2 MeV (rms). Simulations also show that the initial absolute energy spread remains nearly constant during the subsequent acceleration due to the very short bunch length, and this indicates that further acceleration of the electron bunches up to the GeV level may lead to an electron beam with an energy spread well below 0.5%. Such low-energy-spread electron beams may have potential applications for future coherent light sources driven by laser-plasma accelerators. 其他題名： PPCF 其他題名： Plasma Phys. Control. Fusion 出版者： United Kingdom: IOP Publishing 出版日期： 2016-03-01 出處： Plasma physics and controlled fusion, 2016-03, Vol.58 (3), p.34004 資源來源： IOPP:Institute of Physics Publishing 版權： 2016 IOP Publishing Ltd 識別號： ISSN: 0741-3335 識別號： ISSN: 1361-6587 識別號： EISSN: 1361-6587 識別號： DOI: 10.1088/0741-3335/58/3/034004 識別號： CODEN: PLPHBZ
显示于类别:	[物理學系] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	29	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....