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在等离子唤醒场加速器中的电子束的高效加速

M Litos¹, E Adli², W An³

¹SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.

|November 7, 2014

概括

研究人员使用等离子体唤醒场加速器实现了带电粒子束的高效加速. 这一突破证明了向开发紧且负担得起的粒子加速器技术迈出的重要一步.

科学领域:

等离子体物理学的物理学
粒子加速器中的粒子加速器
高能物理高能物理

背景情况:

紧且经济实惠的高能碰撞器需要有效加速带电粒子束.
等离子体唤醒场加速器 (PWFA) 通过使用等离子体波来产生高加速场提供了一个有前途的解决方案.
之前的实验实现了高能量,但缺乏足够的电荷来提取大量的能量.

研究的目的:

为了证明PWFA中一个离散的电子束的高效加速.
为了从等离子体唤醒场中获得大量的能量提取.
将PWFA技术推进到实际的加速器应用.

主要方法:

采用非线性等离子唤醒场加速器,由超相对论电子束驱动.
采用了一组离散的电子,具有足够的电荷来与等离子体相互作用.
在等离子体内精确控制了驱动和尾随团之间的距离.

主要成果:

成功加速了一个含有大约74 picocoulombs 电荷的尾随电子束.
实现了每米约4.4千兆伏的加速梯度.
证明了每颗粒子的高能量增益 (1.6 GeV) 与低能量扩散 (0.7% 2.0%) 和高能量传输效率 (高达 30%).

结论:

这项研究标志着PWFA发展的里程碑,它显示了实质性电子电荷在狭窄的能量分布下有效加速.
结果验证了PWFA作为未来高能碰撞器的紧和负担得起的技术的潜力.
从等离子唤醒到一个不同的电子束的高效能能量转移已经经过实验验证.

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