Diffraction-limited storage ring

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Diffraction-limited storage rings (DLSR), or ultra-low emittance storage rings, are synchrotron light sources where the emittance of the electron-beam in the storage ring is smaller or comparable to the emittance of the x-ray photon beam they produce at the end of their insertion devices. These facilities operate in the soft to hard x-ray range (100eV—100keV) with extremely high brilliance (in the order of 1021—1022 photons/s/mm2/mrad2/0.1%BW)

Together with X-ray free-electron lasers, they constitute the fourth generation of light sources,[1] characterized by a relatively high coherent flux (in the order of 1014—1015photons/s/0.1%BW for DLSR) and enable extended physical and chemical characterizations at the nano-scale.

Existing diffraction-limited storage rings[edit]

DLSR upgrade or facilities under construction[edit]

Planned or projected DLSR upgrades or new facilities[edit]

See also[edit]


  1. ^ Yabashi, Makina; Tanaka, Hitoshi (2017). "The next ten years of X-ray science". Nature Photonics. 11: 12–14. doi:10.1038/nphoton.2016.251.
  2. ^ Streun, Andreas; Garvey, Terence; Rivkin, Lenny; Schlott, Volker; Schmidt, Thomas; Willmott, Philip; Wrulich, Albin (2018). "SLS-2 – the upgrade of the Swiss Light Source". Journal of Synchrotron Radiation. 25 (3): 631–641. doi:10.1107/S1600577518002722. PMC 5929351. PMID 29714174.