Lument Patent Firm
High-gain thompson-scattering X-ray free-electron laser by time-synchronic laterally tilted optical wave
An improved optical undulator for use in connection with free electron radiation sources is provided. A tilt is introduced between phase fronts of an optical pulse and the pulse front. Two such pulses in a counter-propagating geometry overlap to create a standing wave pattern. A line focus is used to increase the intensity of this standing wave pattern. An electron beam is aligned with the line focus. The relative angle between pulse front and phase fronts is adjusted such that there is a velocity match between the electron beam and the overlapping optical pulses along the line focus. This allows one to provide a long interaction length using short and intense optical pulses, thereby greatly increasing the radiation output from the electron beam as it passes through this optical undulator.
The Board of Trustees of the Leland Stanford Junior University Tsinghua University
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Juhao Chao Chuanxiang
Wu Chang Tang