Refractive Guide Switching a Regenerative Amplifier Free-Electron Laser for High Peak and Average Power Hard X Rays

被引：24
作者：
Marcus, Gabriel [1 ]
Halavanau, Alex [1 ]
Huang, Zhirong [1 ]
Krzywinski, Jacek [1 ]
MacArthur, James [1 ]
Margraf, Rachel [1 ]
Raubenheimer, Tor [1 ]
Zhu, Diling [1 ]
机构：
[1] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
来源：
PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 25期
关键词：
HIGH-RESOLUTION; GAIN; REFLECTIVITY; OPERATION; OPTICS; MODES;
D O I：
10.1103/PhysRevLett.125.254801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present an x-ray regenerative amplifier free-electron laser design capable of producing fully coherent hard x-ray pulses across a broad tuning range at a high steady state repetition rate. The scheme leverages a strong undulator taper and an apertured diamond output-coupling cavity crystal to produce both high peak and average spectral brightness radiation that is 2 to 3 orders of magnitude greater than conventional single-pass self-amplified spontaneous emission free-electron laser amplifiers. Refractive guiding in the postsaturation regime is found to play a key role in passively controlling the stored cavity power. The scheme is explored both analytically and numerically in the context of the Linac Coherent Light Source II High Energy upgrade.
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