The TROIKA beamline at ESRF

Abstract
The Troika beamline is a high-brilliance multi-station undulator beamline that operates with x-ray transparent diamond and/for beryllium monochromators. A series of such transmission monochromators can use the same white beam and supply several experimental stations simultaneously with monochromatic x-rays of slightly different energies (beam-multiplexing). The favorable thermal and crystallographic properties of perfect diamond are well matched to the characteristics of the new low emittance undulator sources. The low absorption of both diamond and beryllium make beam-multiplexing to an attractive alternative to conventional single-station beamlines. The Troika beamline operates between 6 keV and 18 keV taking advantage of the gap tunable undulator. First experiments exploring the brightness, polarization properties and the high flux of coherent x-rays produced reveal the superior potential of third generation synchrotron sources.