The Astra Gemini project – A dual-beam petawatt Ti:Sapphire laser system C.J. Hooker, J.L. Collier, O. Chekhlov, R. Clarke, E. Divall, K. Ertel, B. Fell, P. Foster, S. Hancock, A. Langley, D. Neely, J. Smith et B. WybornJ. Phys. IV France, 133 (2006) 673-677DOI: https://doi.org/10.1051/jp4:2006133135