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@unpublished{huang:fls2023-we1l2,
author = {Z. Huang},
title = {{Progress of Cavity-based X-ray Free-electron Lasers}},
% booktitle = {Proc. FLS'23},
booktitle = {Proc. ICFA Adv. Beam Dyn. Workshop (FLS'23)},
eventdate = {2023-08-27/2023-09-01},
language = {english},
intype = {presented at the},
series = {ICFA Advanced Beam Dynamics Workshop},
number = {67},
venue = {Luzern, Switzerland},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {01},
year = {2024},
note = {presented at FLS'23 in Luzern, Switzerland, unpublished},
abstract = {{Cavity-based X-ray Free electron lasers (FELs) such as the X-ray regenerative amplifier FEL (XRAFEL)* and the X-ray FEL oscillator (XFELO)** have been proposed to produce temporally coherent and stable hard X-ray pulses, especially for high-repetition rate FEL facilities. An X-ray cavity consisting of Bragg crystals will be used to recirculate the spectrally filtered X-rays for repetitive interactions with an electron bunch train and to generate high-power and narrow-bandwidth radiation. In this talk, we review the scientific motivation and recent progress of Cavity-based X-ray FELs. We discuss cavity designs, optics requirements, outcoupling schemes, and the latest experimental results. Finally, we introduce the ongoing RD projects at LCLS*** and European XFEL**** to prove the concept, as well as several Cavity-based proposals to enhance X-ray FEL’s spectral brightness by another two to three orders of magnitude compared to the state of art.}},
}