Open AccessA plane‐grating monochromator beamline for the PTB undulators at BESSY II
Author(s) -
Senf F.,
Flechsig U.,
Eggenstein F.,
Gudat W.,
Klein R.,
Rabus H.,
Ulm G.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049597020323
Subject(s) - monochromator , beamline , optics , grating , physics , photon , storage ring , photon energy , synchrotron radiation , beam (structure) , wavelength
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.