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通过激光脉冲的碰撞,在等离子唤醒场中控制电子的注入和加速
J Faure1, C Rechatin, A Norlin
1Laboratoire d'Optique Appliquée, ENSTA, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau, France.
Nature
|December 8, 2006
概括
在激光等离子加速器中通过第二次激光脉冲控制电子注入,可实现稳定,高质量的电子束. 这一突破有望为各种科学和医学应用提供紧,可调和和可重复的电子源.
科学领域:
- 物理 物理学 物理
- 加速器科学加速器科学
- 等离子体物理学的物理学
背景情况:
- 激光等离子加速器在短距离上提供高能量增益.
- 目前用于电子注入的方法不稳定且不可重现.
- 实现稳定,高质量的电子束对于应用至关重要.
研究的目的:
- 用双激光脉冲系统来演示受控的电子注入和加速.
- 为了提高来自激光等离子加速器的电子束的稳定性和可重复性.
主要方法:
- 使用第二个激光脉冲与主激光驱动的等离子体唤醒场相互作用.
- 使用两个激光脉冲的碰撞来预加速电子以进行受控注入.
- 以能量,分歧,稳定性和持续时间来描述由此产生的电子束.
主要成果:
- 实现了稳定和可重复的电子束,其差距较小 (<5mrad).
- 产生的单能电子束的能量分布<10%,可调节在15-250 MeV之间.
- 观察到的电子束持续时间小于10 femtoseconds.
结论:
- 双激光脉冲注射提供了一种稳定可控的方法来产生高质量的电子束.
- 这种技术克服了以前激光等离子加速器可重现性的局限性.
- 开发的电子源适用于材料科学,放射治疗和女性化学领域的应用.
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