# Scientific Opportunities with an X-ray Free-Electron Laser Oscillator **Authors:** Bernhard Adams, Gabriel Aeppli, Thomas Allison, Alfred Q. R. Baron,, Phillip Bucksbaum, Aleksandr I. Chumakov, Christopher Corder, Stephen P., Cramer, Serena DeBeer, Yuntao Ding, J\"org Evers, Josef Frisch, Matthias, Fuchs, Gerhard Gr\"ubel, Jerome B. Hastings, Christoph M. Heyl, Leo Holberg,, Zhirong Huang, Tetsuya Ishikawa, Andreas Kaldun, Kwang-Je Kim, Tomasz, Kolodziej, Jacek Krzywinski, Zheng Li, Wen-Te Liao, Ryan Lindberg, Anders, Madsen, Timothy Maxwell, Giulio Monaco, Keith Nelson, Adriana Palffy, Gil, Porat, Weilun Qin, Tor Raubenheimer, David A. Reis, Ralf R\"ohlsberger, Robin, Santra, Robert Schoenlein, Volker Sch\"unemann, Oleg Shpyrko, Yuri Shvyd'ko,, Sharon Shwartz, Andrej Singer, Sunil K. Sinha, Mark Sutton, Kenji Tamasaku,, Hans-Christian Wille, Makina Yabashi, Jun Ye, Diling Zhu arXiv: 1903.09317 · 2019-03-27 ## TL;DR An X-ray free-electron laser oscillator (XFELO) offers fully coherent, stable, and narrow-bandwidth X-ray pulses, opening new scientific opportunities beyond existing SASE-based XFEL sources. ## Contribution This paper discusses the potential scientific applications and advantages of XFELO, a new type of X-ray source, based on workshop discussions. ## Key findings - XFELO produces fully coherent, stable X-ray pulses. - XFELO complements existing SASE XFEL sources. - Potential for new scientific experiments with narrow-band X-ray beams. ## Abstract An X-ray free-electron laser oscillator (XFELO) is a new type of hard X-ray source that would produce fully coherent pulses with meV bandwidth and stable intensity. The XFELO complements existing sources based on self-amplified spontaneous emission (SASE) from high-gain X-ray free-electron lasers (XFEL) that produce ultra-short pulses with broad-band chaotic spectra. This report is based on discussions of scientific opportunities enabled by an XFELO during a workshop held at SLAC on June 29 - July 1, 2016 ## Full text _Full body text omitted from this summary view._ Fetch the complete paper as Markdown: https://tomesphere.com/paper/1903.09317/full.md ## Figures 12 figures with captions in the complete paper: https://tomesphere.com/paper/1903.09317/full.md ## References 160 references — full list in the complete paper: https://tomesphere.com/paper/1903.09317/full.md --- Source: https://tomesphere.com/paper/1903.09317