Ni-like x-ray lasing action pumped by the TARANIS laser system

T. Dzelzainis; D. Doria; S. White; M. Makita; G. Narsisyan; D. Marlow; R. Stefanuik; H. Ahmed; C. Seeley; D. Riley; B. Dromey; L. Romagnani; M. Zepf; M. Borghesi; C. L. S. Lewis

doi:10.1117/12.840535

28 September 2009 Ni-like x-ray lasing action pumped by the TARANIS laser system

T. Dzelzainis, D. Doria, S. White, M. Makita, G. Narsisyan, D. Marlow, R. Stefanuik, H. Ahmed, C. Seeley, D. Riley, B. Dromey, L. Romagnani, M. Zepf, M. Borghesi, C. L. S. Lewis

Author Affiliations +

Proceedings Volume 7451, Soft X-Ray Lasers and Applications VIII; 745119 (2009) https://doi.org/10.1117/12.840535
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We report on the results of an experiment using the TARANIS laser system at Queen's University, Belfast (QUB) to pump Ni-like X-Ray Lasers (XRLs) in the GRazing Incidence Pumped (GRIP) configuration. The system uses a long 1.2ns pulse to create a pre-plasma at the correct ionization stage, and a short, ~800fs pulse to produce a population inversion. Strong lasing has been observed for Ni-ions of Mo and Ag. Mo exhibited gain on two laser lines, at 18.9nm and 22.6nm, whilst only a single line, at 13.9nm, has been observed for Ag. The growth curves for both elements are presented. The curve for Ag indicates that saturation has not been achieved. Saturation like behaviour is seen for Mo but the small signal gain and poor fit to the Linford formula indicate that the roll-off is attributable to some effect other than gain saturation. Axial non-uniformity in the gain and mis-match between the ASE group velocity and the traveling-wave excitation are discussed as possible explanations for the shape of the Mo growth curve. Results of an initial application to characterize image plate as a soft x-ray detector are presented and, finally, further possible applications, in particular the potential for the XRL to be used as a photon source for Thomson scattering, are investigated.

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T. Dzelzainis, D. Doria, S. White, M. Makita, G. Narsisyan, D. Marlow, R. Stefanuik, H. Ahmed, C. Seeley, D. Riley, B. Dromey, L. Romagnani, M. Zepf, M. Borghesi, and C. L. S. Lewis "Ni-like x-ray lasing action pumped by the TARANIS laser system", Proc. SPIE 7451, Soft X-Ray Lasers and Applications VIII, 745119 (28 September 2009); https://doi.org/10.1117/12.840535

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