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Beam and sample movement compensation for robust spectro-microscopy measurements on a hard X-ray nanoprobe

DOI: 10.1107/S1600577521007736 DOI Help

Authors: Paul D. Quinn (Diamond Light Source) , Miguel Gomez-Gonzalez (Diamond Light Source) , Fernando Caco-Nerin (Diamond Light Source) , Julia E. Parker (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 28

State: Published (Approved)
Published: September 2021
Diamond Proposal Number(s): 25187

Open Access Open Access

Abstract: Static and in situ nanoscale spectro-microscopy is now routinely performed on the Hard X-ray Nanoprobe beamline at Diamond and the solutions implemented to provide robust energy scanning and experimental operation are described. A software-based scheme for active feedback stabilization of X-ray beam position and monochromatic beam flux across the operating energy range of the beamline is reported, consisting of two linked feedback loops using extremum seeking and position control. Multimodal registration methods have been implemented for active compensation of drift during an experiment to compensate for sample movement during in situ experiments or from beam-induced effects.

Journal Keywords: feedback; beam positioning; image alignment; nano-XANES; spectro-microscopy; nano­probes

Subject Areas: Information and Communication Technology, Physics

Instruments: I14-Hard X-ray Nanoprobe

Added On: 23/08/2021 10:41


Discipline Tags:

Physics Computing & software technologies Information & Communication Technologies

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) X-ray Absorption Near Edge Structure (XANES)