Characterization of laser wakefield acceleration efficiency with octave spanning near-IR spectrum measurements
Characterization of laser wakefield acceleration efficiency with octave spanning near-IR spectrum measurements
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DOI：
10.1103/physrevaccelbeams.25.101302
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发表时间：
2020-11
影响因子：
1.7
通讯作者：
M. Streeter;Y. Ma;B. Kettle;S. Dann;E. Gerstmayr;F. Albert;N. Bourgeois;S. Cipiccia;J. Cole;I. Gallardo González;A. Hussein;D. Jaroszynski;K. Falk;K. Krushelnick;N. Lemos;N. Lopes;C. Lumsdon;O. Lundh;S. Mangles;Z. Najmudin;P. Rajeev;R. Sandberg;M. Shahzad;M. Šmíd;R. Spesyvtsev;D. Symes;G. Vieux;A. Thomas
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文献类型：
--
作者：
M. Streeter;Y. Ma;B. Kettle;S. Dann;E. Gerstmayr;F. Albert;N. Bourgeois;S. Cipiccia;J. Cole;I. Gallardo González;A. Hussein;D. Jaroszynski;K. Falk;K. Krushelnick;N. Lemos;N. Lopes;C. Lumsdon;O. Lundh;S. Mangles;Z. Najmudin;P. Rajeev;R. Sandberg;M. Shahzad;M. Šmíd;R. Spesyvtsev;D. Symes;G. Vieux;A. Thomas
我们报告了 GeV 级激光尾场加速器中的高效能量传输。通过同时测量激光光子和加速电子的减速度与加速长度的关系，可以通过实验诊断从激光到等离子体尾场以及从等离子体到加速电子束的能量转移。我们将提取效率定义为电子束获得的能量与自导激光模式损失的能量之比，通过调整等离子体密度、等离子体长度和入射激光脉冲压缩，提取效率在 $27\pm2$ % 处最大化。在较高密度下，观察到激光在整个倍频程（从 800 nm 到 1600 nm）内发生完全红移。
We report on high efficiency energy transfer in a GeV-class laser wakefield accelerator. Both the transfer of energy from the laser to the plasma wakefield, and from the plasma to the accelerated electron beam were diagnosed experimentally by simultaneous measurement of the deceleration of laser photons and the accelerated electrons as a function of acceleration length. The extraction efficiency, which we define as the ratio of the energy gained by the electron beam to the energy lost by the self-guided laser mode, was maximised at $27\pm2$ % by tuning of the plasma density, plasma length and incident laser pulse compression. At higher densities, the laser was observed to fully redshift over an entire octave, from 800~nm to 1600~nm.