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Bright Quasi-Phase-Matched Soft-X-Ray Harmonic Radiation from Argon Ions

M. Zepf, B. Dromey, M. Landreman, P. Foster, and S. M. Hooker
Phys. Rev. Lett. 99, 143901 – Published 1 October 2007

Abstract

Selective enhancement (>103) of harmonics extending to the water window (4nm) generated in an argon gas filled straight bore capillary waveguide is demonstrated. This enhancement is in good agreement with modeling which indicates that multimode quasi-phase-matching is achieved by rapid axial intensity modulations caused by beating between the fundamental and higher-order capillary modes. Substantial pulse energies (>10nJ per pulse per harmonic order) at wavelengths beyond the carbon K edge (4.37nm, 284eV) up to 360eV are observed from argon ions for the first time.

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  • Received 15 February 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.143901

©2007 American Physical Society

Authors & Affiliations

M. Zepf1,*, B. Dromey1, M. Landreman2, P. Foster3, and S. M. Hooker2

  • 1Department of Physics and Astronomy, Queens University Belfast, BT7 1NN, United Kingdom
  • 2Clarendon Laboratory, Oxford University, OX1 3PU, United Kingdom
  • 3Central Laser Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kindgom

  • *m.zepf@qub. ac. uk

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Vol. 99, Iss. 14 — 5 October 2007

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