An X-ray BBB Michelson interferometer

DOI: 10.1107/S0909049504015468
PMID: 15310953

Authors: John P. Sutter (SPring-8/JASRI) , Tetsuya Ishikawa (SPring-8/RIKEN) , Ulrich Kuetgens (Physikalisch-Technische Bundesanstalt) , Gerhard Materlik (Diamond Light Source) , Yoshinori Nishino (SPring-8/RIKEN) , Armen Rostomyan (Yerevan State University) , Kenji Tamasaku (SPring-8/RIKEN) , Makina Yabashi (SPring-8/RIKEN)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 11 , PAGES 378 - 385

State: Published (Approved)
Published: September 2004

Abstract: A new X-ray Michelson interferometer based on the BBB interferometer of Bonse and Hart and designed for X-rays of wavelength similar to1 Angstrom was described in a previous paper. Here, a further test carried out at the SPring-8 1 km beamline BL29XUL is reported. One of the BBB's mirrors was displaced by a piezo to introduce the required path-length difference. The resulting variation of intensity with piezo voltage as measured by an avalanche photodiode could be ascribed to the phase variation resulting from the path-length change, with a small additional contribution from the change of the position of the lattice planes of the front mirror relative to the rest of the crystal. This 'Michelson fringe' interpretation is supported by the observed steady movement across the output beam of the interference fringes produced by a refractive wedge when the piezo voltage was ramped. The front-mirror displacement required for one complete fringe at the given wavelength is only 0.675 Angstrom; therefore, a quiet environment is vital for operating this device, as previous experiments have shown.

Journal Keywords: X-Ray Michelson Interferometer; Free-Electron Laser.

Subject Areas: Physics

Facility: BL29XUL at SPring-8

Added On: 10/11/2010 08:51

Discipline Tags:

Physics

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