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, 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
- MAX IV Laboratory, in Lund, Sweden.
- Sirius, in Campinas, Brazil
- European Synchrotron Radiation Facility, Extremely Brilliant Source (), in Grenoble, France
DLSR upgrade or facilities under construction
- Advanced Photon Source Upgrade (), in Argonne, Illinois, USA
- Swiss Light Source 2, Upgrade (SLS 2.0), in Villigen, Switzerland
Planned or projected DLSR upgrades or new facilities
Upgrades
- PETRA IV, Upgrade (), at DESY, Hamburg, Germany
- Advanced Light Source, Upgrade (), in Berkeley, California, USA
- Diamond II (), in Didcot, Oxfordshire, UK
- ELETTRA 2.0 (), in Trieste, Italy
- ALBA II, in Barcelona, Spain
- SOLEIL II, in Saint-Aubin, France
New facilities
- High Energy Photon Source (HEPS), in Beijing, China
See also
- X-Ray Free Electron Lasers