Generation and measurement of relativistic electron bunches characterized by a linearly ramped current profile

被引：43

作者：

England, R. J. ^{[1
]}

Rosenzweig, J. B. ^{[1
]}

Travish, G. ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 21期

关键词：

Electrons;

D O I：

10.1103/PhysRevLett.100.214802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first successful attempt to generate ultrashort (1 - 10 ps) relativistic electron bunches characterized by a ramped longitudinal current profile that rises linearly from head to tail and then falls sharply to zero. Bunches with this type of longitudinal shape may be applied to plasma-based accelerator schemes as an optimized drive beam, and to free-electron lasers as a means of reducing asymmetry in microbunching due to slippage. The scheme used to generate the ramped bunches employs an anisochronous dogleg beam line with nonlinear correction elements to compress a beam having an initial positive time-energy chirp. The beam current profile is measured using a deflecting mode cavity, and a pseudoreconstruction of the beam's longitudinal phase space distribution is obtained by using this diagnostic with a residual horizontal dispersion after the dogleg.

引用

页数：4

共 9 条

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