标题： 兆瓦级相对论电子束通过毫米级孔径的传输 显示英文标题

标题： Transmission of Megawatt Relativistic Electron Beams Through Millimeter Apertures

摘要： 高功率、相对论性电子束从能量回收直线加速器产生，为实现基础和应用研究的新实验范式带来了巨大潜力。 对于这一新世代的实验能力而言，设计中的一个重要考量因素是对与这些明亮且高强度电子束相伴的束晕的理解。 在本文中，我们报告了利用杰斐逊实验室自由电子激光设施的能量回收直线加速器产生的100 MeV、430千瓦连续波电子束所进行的测量结果，该束流穿过了一个由铝块构成的长127毫米的小孔径集合体。 通过对该块体的热测量以及在束流-靶相互作用点附近的中子测量，得出了关于束流损失的一致理解。 这些束流损失被确定为通过直径2毫米小孔时为3 ppm，并在整个7小时的连续运行过程中得以维持。 显示英文摘要

摘要： High power, relativistic electron beams from energy recovery linacs have great potential to realize new experimental paradigms for pioneering innovation in fundamental and applied research. A major design consideration for this new generation of experimental capabilities is the understanding of the halo associated with these bright, intense beams. In this Letter, we report on measurements performed using the 100 MeV, 430 kWatt CW electron beam from the energy recovery linac at the Jefferson Laboratory's Free Electron Laser facility as it traversed a set of small apertures in a 127 mm long aluminum block. Thermal measurements of the block together with neutron measurements near the beam-target interaction point yielded a consistent understanding of the beam losses. These were determined to be 3 ppm through a 2 mm diameter aperture and were maintained during a 7 hour continuous run.