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A review of X-ray laser development at Rutherford Appleton Laboratory

By G.J. Tallents, M. Edwards, R. King, G.J. Pert, O Guilbaud, R. Clarke, Y. Abou-Ali, S.J. Pestehe, F. Strati, C.L.S. Lewis, R. Keenan, S. Topping, A. Klisnick, D. Ros, M. Notley and D. Neely

Abstract

Recent experiments undertaken at the Rutherford Appleton Laboratory to produce X-ray lasing over the 5-30 nm wavelength range are reviewed. The efficiency of lasing is optimized when the main pumping pulse interacts with a preformed plasma. Experiments using double 75-ps pulses and picosecond pulses superimposed on 300-ps background pulses are described. The use of travelling wave pumping with the approximately picosecond pulse experiments is necessary as the gain duration becomes comparable to the time for the X-ray laser pulse to propagate along the target length. Results from a model taking account of laser saturation and deviations from the speed of light c of the travelling wave and X-ray laser group velocity are presented. We show that X-ray laser pulses as short as 2-3 ps can be produced with optical pumping pulses of approximate to1-ps

Year: 2002
DOI identifier: 10.1017/S0263034602202074
OAI identifier: oai:eprints.whiterose.ac.uk:1864

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