Travelling wave chirped pulse amplified transient pumping for collisional excitation lasers

J.Y. Lin, G.J. Tallents, A.G. MacPhee, A. Demir, Ciaran Lewis, R.M.N. O'Rourke, G.J. Pert, D. Ros, P. Zeitoun

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


A similar to 3 ps travelling wave chirped pulse amplified pulse at 6 x 10(14) W cm(-2) superimposed on similar to 300 ps background pulses is shown to be an efficient method to pump transient collisional excitation X-ray lasers in both Ni-like and Ne-like ions. Measurements of X-ray laser output as a function of plasma length are fitted with results of an amplified spontaneous emission model of the laser output taking account of travelling wave pumping effects. A small signal gain coefficient similar to 42 cm(-1) and a effective gain length product of similar to 18 are measured for the Ni-like Sn laser at 120 Angstrom. Simulations from a hydrodynamic and atomic physics code (EHYBRID) coupled to a ray trace code show that a spatially averaged small signal gain similar to 65 cm(-1) can be obtained in Ne-like Ge provided the optimum pumping pulse arrangement is used. (C) 1999 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalOptics Communications
Issue number1
Publication statusPublished - 01 Aug 1999

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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