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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 24 — Aug. 22, 2005
  • pp: 5069–5075

High efficiency, high quality x-ray optic based on ellipsoidally bent highly oriented pyrolytic graphite crystal for ultrafast x-ray diffraction experiments

I. Uschmann, U. Nothelle, E. Förster, V. Arkadiev, N. Langhoff, A. Antonov, I. Grigorieva, R. Steinkopf, and A. Gebhardt  »View Author Affiliations


Applied Optics, Vol. 44, Issue 24, pp. 5069-5075 (2005)
http://dx.doi.org/10.1364/AO.44.005069


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Abstract

By the use of a thin highly oriented pyrolytic graphite crystal (HOPG) bent to a high-performance ellipsoidal shape it was possible to focus monochromatic x-rays of 4.5 keV photon energy with an efficiency of 0.0033, which is 30 times larger than for previously used bent crystals. Isotropic Ti Kα radiation of a 150 μm source was focused onto a 450 μm spot. The size of the focal spot can be explained by broadening due to the mosaic crystal rocking curve. The rocking curve width (FWHM) of the thin graphite foil was determined to 0.11°. The estimated temporal broadening of an ultrashort Kα pulse by the crystal is not larger than 300 fs. These properties make the x-ray optic very attractive for ultrafast time-resolved x-ray measurements.

© 2005 Optical Society of America

OCIS Codes
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(340.0340) X-ray optics : X-ray optics
(340.7440) X-ray optics : X-ray imaging
(340.7470) X-ray optics : X-ray mirrors
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)

History
Original Manuscript: April 5, 2004
Manuscript Accepted: January 4, 2005
Published: August 20, 2005

Citation
I. Uschmann, U. Nothelle, E. Förster, V. Arkadiev, N. Langhoff, A. Antonov, I. Grigorieva, R. Steinkopf, and A. Gebhardt, "High efficiency, high quality x-ray optic based on ellipsoidally bent highly oriented pyrolytic graphite crystal for ultrafast x-ray diffraction experiments," Appl. Opt. 44, 5069-5075 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-24-5069


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