Spatial coherence determination from the Fourier analysis of a resonant soft X-ray magnetic speckle pattern

• We present a method to determine the two-dimensional spatial coherence of synchrotron radiation in the soft X-ray regime by analyzing the Fourier transform of the magnetic speckle pattern from a ferromagnetic film in a multidomain state. To corroborate the results, a Young's double-pinhole experiment has been performed. The transverse coherence lengths in vertical and horizontal direction of both approaches are in a good agreement. The method presented here is simple and gives a direct access to the coherence properties of synchrotron radiation without nanostructured test objects.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Critical currents

Ferromagnetic materials

Fourier analysis

Synchrotron radiation

Synchrotrons

Coherence properties

Ferromagnetic films

Magnetic speckles

Multi domains

Nano-structured

Spatial coherence

Test object

Transverse coherence

Speckle

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