J. Phys. IV France 11 (2001) Pr2-43-Pr2-46
Temporal resolution of a transient pumping X-ray laserJ. Kuba1, A. Klisnick2, D. Ros2, R. Smith2, G. Jamelot2, C. Chenais-Popovics3, R. Keenan4, S.J. Topping4, C.L.S. Lewis4, F. Strati5, G.J. Tallents5, D. Neely6, A.G. MacPhee6, R.J. Clarke6, J. Collier6, P.V. Nickles7, K.A. Janulewicz7 and F. Bortolotto7
1 Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 11519 Prague 1, Czech Republic
2 Laboratoire de Spectroscopie Atomique et Ionique, Université Paris-Sud, bâtiment 350, 91405 Orsay cedex, France
3 LULI, École Polytechnique, 91123 Palaiseau, France
4 Department of Pure & Applied Physics, The Queen's University of Belfast, Belfast BT7 1NN, U.K.
5 Department of Physics, York University, Heslington YO10 5DD, U.K.
6 Rutherford Appleton Laboratory, Chilton Didcot, Oxfordshire OX11 0QX, U.K.
7 Max Born Institut, Max-Born-Str. 2 A, 12489 Berlin, Germany
We report on a time-resolved study of a Ni-like transient collisionnal X-ray laser with a resolution as high as 1.9 ps. The FWHM duration of the Ni-like x-ray laser pulse at 13.99 nm [MATH] line is measured to be as short as [MATH] at optimum conditions of pump laser irradiation. This is about four times shorter than was estimated in previous experiments. The x-ray laser signal appears in the rising edge of the continuum emission. The x-ray laser duration rises significantly when the short (heating) pulse duration is increased and when doubling the peak-to-peak delay of the two irradiation pulses. It does not change when the short pulse energy is increased. The results presented are the first direct measurements of the temporal profile of the x-ray laser output at a high resolution.
© EDP Sciences 2001