Abstract
An undulator having a long, periodic magnetic structure installed at a low emittance storage ring generates quasi-monochromatic, narrowly collimated, and partially coherent radiation. However, undulators currently operated and even those planed at third-generation synchrotron sources still do not provide a narrow bandwidth and a low emittance enough to meet spatial and temporal coherence requirements for experiments such as soft X-ray interferometry, holography, and scanning microscopy. This paper presents a beamline design which comprises a variable-spacing spherical grating monochromator with a Kirkpatrick-Baez (KB) prefocusing system to deliver a spatially and temporally coherent flux into an end station without sacrificing throughput for the coherent flux radiated from the undulator.
© 1993 Optical Society of America
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