Temporal evolution of longitudinal bunch profile in a laser wakefield accelerator

被引：40
|
作者：
Heigoldt, M. [1 ,2 ]
Popp, A. [1 ,2 ]
Khrennikov, K. [1 ,2 ]
Wenz, J. [1 ,2 ]
Chou, S. W. [1 ,2 ]
Karsch, S. [1 ,2 ]
Bajlekov, S. I. [3 ]
Hooker, S. M. [3 ]
Schmidt, B. [4 ]
机构：
[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany
[2] Univ Munich, D-85748 Garching, Germany
[3] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
[4] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany
来源：
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2015年 / 18卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
ELECTRON BUNCH; PLASMA ACCELERATOR; COHERENT RADIATION; BEAMS; FEMTOSECOND; PHASE;
D O I：
10.1103/PhysRevSTAB.18.121302
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We present single-shot measurements of the longitudinal bunch profile from a laser-wakefield accelerator with sub-fs resolution, based on detection of coherent transition radiation in a broad spectral range. A previously developed phase retrieval algorithm enables reconstruction of the bunch profile without prior assumptions about its shape. In this study, a variable-length gas target is used to explore the dynamics of bunch evolution. Our results show that once the laser energy is depleted the time structure of the generated electron beam changes from a single bunch to a double bunch structure, well suited for driver-witness type experiments.
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收藏
页数：6
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