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Initial tests of a new X-ray Michelson interferometer

DOI: 10.1107/S0021889803020740 DOI Help

Authors: John P. Sutter (Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY) , Ulrich Kuetgens (Physikalisch-Technische Bundesanstalt) , Gerhard Materlik (Diamond Light Source) , Armen Rostomyan (Yerevan State University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Applied Crystallography , VOL 36 , PAGES 1432 - 1439

State: Published (Approved)
Published: November 2003

Abstract: A Michelson interferometer for X- rays of wavelength similar to 1 Angstrom has been proposed to test the temporal coherence of FEL radiation. Such a device has been made at HASYLAB from a silicon single crystal. It is based on the BBB interferometer of Bonse and Hart. One of its mirrors can be pushed by a piezo to introduce the desired beam path difference. For the preliminary tests described in this paper, the crystal was also equipped with an LLL interferometer to check the quality of the crystal and of its preparation. The rotation of a phase- shifting object ( a Plexiglas plate) in one of the LLL's beam paths has been found to produce a fringe pattern which can be shown to yield the phase- shifting material's index of refraction. The interferometer crystal's front section was held fixed with a compression spring. At the same time, the interferometer was bathed in viscous silicone oil to reduce vibrations.

Journal Keywords: Michelson interferometers; FEL radiation; HASYLAB;

Subject Areas: Physics

Facility: E2 at HASYLAB

Added On: 10/11/2010 08:51

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