Laser-driven pointed acceleration of electrons with preformed plasma lens

IF 1.5 3区物理与天体物理 Q3 PHYSICS, NUCLEAR

Physical Review Accelerators and Beams Pub Date : 2024-05-17 DOI:10.1103/physrevaccelbeams.27.051301

K. A. Ivanov, D. A. Gorlova, I. N. Tsymbalov, I. P. Tsygvintsev, S. A. Shulyapov, R. V. Volkov, A. B. Savel’ev

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Abstract

The simultaneous laser-driven acceleration and angular manipulation of the fast electron beam are experimentally demonstrated. The bunch of multi-MeV energy charged particles is generated during the propagation of the femtosecond laser pulse through the near-critical plasma slab accompanied by plasma channeling. Plasma is formed by the controlled breakdown of a thin-tape target by a powerful nanosecond prepulse. The electron beam pointing approach is based on the refraction of a laser pulse in the presence of a strong radial density gradient in the breakdown of the tape with a small displacement of the femtosecond laser beam relative to the breakdown symmetry axis. A shift of several micrometers makes it possible to achieve beam deflection by an angle up to 10° with acceptable beam charge and spectrum conservation. This opens up opportunities for in situ applications for scanning objects with an electron beam and the multistage electron beam energy gain in consecutive laser accelerators without bulk magnetic optics for particles. Experimental findings are supported by numerical particle-in-cell calculations of laser-plasma acceleration and hydrodynamic simulations.

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利用预制等离子体透镜进行激光驱动的电子尖点加速

实验证明了快速电子束在激光驱动下的同步加速和角度操纵。在飞秒激光脉冲穿过近临界等离子体板的传播过程中，伴随着等离子体通道的形成，产生了一束多兆伏能量的带电粒子。等离子体是通过强大的纳秒级预脉冲对薄带状靶的可控击穿而形成的。电子束指向方法基于激光脉冲在薄带击穿过程中的强烈径向密度梯度下的折射，飞秒激光束相对于击穿对称轴的位移很小。几微米的位移就能使光束偏转 10° 角，并且光束电荷和光谱保持不变。这为原位应用电子束扫描物体和连续激光加速器中的多级电子束能量增益提供了机会，而不需要针对粒子的体磁性光学器件。实验结果得到了激光等离子体加速和流体力学模拟的粒子舱内数值计算的支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Review Accelerators and Beams Physics and Astronomy-Surfaces and Interfaces

CiteScore

3.90

自引率

23.50%

发文量

158

审稿时长

23 weeks

期刊介绍： Physical Review Special Topics - Accelerators and Beams (PRST-AB) is a peer-reviewed, purely electronic journal, distributed without charge to readers and funded by sponsors from national and international laboratories and other partners. The articles are published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. It covers the full range of accelerator science and technology; subsystem and component technologies; beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high-energy and nuclear physics, synchrotron-radiation production, spallation neutron sources, medical therapy, and intense-beam applications.