A plane-grating monochromator beamline for the PTB undulators at BESSY II.
At the BESSY II storage ring, the Physikalisch-Technische Bundesanstalt (PTB) will operate insertion devices dedicated to radiometric use. One branch of the appendant beamline system will be equipped with a grazing-incidence monochromator, described here. The monochromator concept is based on a plane grating operated in parallel light; therefore exact focusing is maintained for all photon energies irrespective of the angular setting at the grating. The monochromator has been optimized for small higher-order transmittance and high power throughput, as required by radiometric applications in the wide photon energy range from 20 eV to 1900 eV.
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BESSY GmbH, Lentzeallee 100, 14195 Berlin, Germany.
Flechsig
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Eggenstein
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Gudat
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Klein
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Rabus
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Ulm
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