Optical pseudomotors for soft x-ray beamlines

Journal Article · Sun May 15 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4949339· OSTI ID:22597930

Sics, I.; Sorrentino, A.; Pereiro, E.; Aballe, L.; Foerster, M.; Pérez-Dieste, V.; Escudero, C.; Nicolas, J. ^[1]

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1. ALBA Synchrotron Light Source, Ctra.BP1413 km 3.3, 08290 Cerdanyola del Vallès (Spain)

Optical elements of soft x-ray beamlines usually have motorized translations and rotations that allow for the fine alignment of the beamline. This is to steer the photon beam at some positions and to correct the focus on slits or on sample. Generally, each degree of freedom of a mirror induces a change of several parameters of the beam. Inversely, several motions are required to actuate on a single optical parameter, keeping the others unchanged. We define optical pseudomotors as combinations of physical motions of the optical elements of a beamline, which allow modifying one optical parameter without affecting the others. We describe a method to obtain analytic relationships between physical motions of mirrors and the corresponding variations of the beam parameters. This method has been implemented and tested at two beamlines at ALBA, where it is used to control the focus of the photon beam and its position independently.

• OSTI ID: 22597930
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALIGNMENT
DEGREES OF FREEDOM
MIRRORS
PHOTON BEAMS
PHOTONS
ROTATION
SOFT X RADIATION