The interaction of a very intense, very short laser pulse is modified by the presence of a preformed plasma prior to the main short pulse. The preformed plasma is created by a small prepulse interacting with the target prior to the main pulse. The prepulse has been monitored using a water-cell-protected fast photodiode allowing on every shot a high dynamic measurement of the pulse profile. Simultaneously we have used time-resolved interferometry to look at the preformed plasma on a 300 TW, 700 fs laser. The two-dimensional density maps obtained have been compared with two-dimensional hydrodynamic simulations.
© 2009 Optical Society of America
Lasers and Laser Optics
Original Manuscript: July 17, 2009
Revised Manuscript: July 29, 2009
Manuscript Accepted: August 6, 2009
Published: September 29, 2009
Sebastien Le Pape, Ying Yin Tsui, Andrew Macphee, Daniel Hey, Pravesh Patel, Andrew Mackinnon, Mike Key, Mingsheng Wei, Tammy Ma, Farhat N. Beg, Rich Stephens, Kramer Akli, Tony Link, Linn Van-Woerkom, and Rick R. Freeman, "Characterization of the preformed plasma for high-intensity laser-plasma interaction," Opt. Lett. 34, 2997-2999 (2009)