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Optical Design in Phase-Space for the I13L X-Ray Imaging and Coherence Beamline at Diamond using XPHASY

DOI: 10.1063/1.3463240 DOI Help

Authors: Ulrich Wagner (Diamond Light Source) , Christoph Rau (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: 10th International Conference on Radiation Instrumentation. AIP Conference Proceedings
Peer Reviewed: No

State: Published (Approved)
Published: September 2010

Abstract: I13L is a 250 m long beamline for imaging and coherent diffraction currently under construction at the Diamond Light Source. For modeling the beamline optics the phase‐space based ray‐tracing code XPHASY was developed, as general ray‐tracing codes for x‐rays do not easily allow studying the propagation of coherence along the beamline. In contrast to computational intensive wave‐front propagation codes, which fully describe the propagation of a photon‐beam along a beamline but obscure the impact of individual optical components onto the beamline performance, this code allows to quickly calculate the photon‐beam propagation along the beamline and estimate the impact of individual components. In this paper we will discuss the optical design of the I13L coherence branch from the perspective of phase‐space by using XPHASY. We will demonstrate how the phase‐space representation of a photon‐beam allows estimating the coherence length at any given position along the beamline. The impact of optical components on the coherence length and the effect of vibrations on the beamline performance will be discussed. The paper will demonstrate how the phase‐space representation of photon‐beams allows a more detailed insight into the optical performance of a coherence beamline than ray‐tracing in real space.

Journal Keywords: Coherence Length; Diffraction; Electron Beams; Light Sources; Optical Systems; Phase Space; Photon Beams; Simulation; Synchrotron Radiation Sources; X Radiation

Subject Areas: Physics

Instruments: I13-1-Coherence , I13-2-Diamond Manchester Imaging