J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 237-241
Laser coupling to reduced-scale targets at NIF Early LightD.E. Hinkel1, M.B. Schneider1, B.K. Young1, J.P. Holder1, A.B. Langdon1, H.A. Baldis2, G. Bonanno1, D.E. Bower1, H.C. Bruns1, K.M. Campbell1, J.R. Celeste1, S. Compton1, R.L. Costa1, E.L. Dewald1, S.N. Dixit1, M.J. Eckart1, D.C. Eder1, M.J. Edwards1, A.D. Ellis1, J.A. Emig1, D.H. Froula1, S.H. Glenzer1, D. Hargrove1, C.A. Haynam1, R.F. Heeter1, M.A. Henesian1, G. Holtmeier1, D.L. James1, K.S. Jancaitis1, D.H. Kalantar1, J.H. Kamperschroer1, R.L. Kauffman1, J. Kimbrough1, R.K. Kirkwood1, A.E. Koniges1, O.L. Landen1, M. Landon1, F.D. Lee1, B.J. MacGowan1, A.J. Mackinnon1, K.R. Manes1, C. Marshall1, M.J. May1, J.W. McDonald1, J. Menapace1, S.E.I. Moses1, D.H. Munro1, J.R. Murray1, C. Niemann1, D. Pellinen3, G.D. Power1, V. Rekow1, J.A. Ruppe1, J. Schein1, R. Shepherd1, M.S. Singh1, P.T. Springer1, C.H. Still1, L.J. Suter1, G.L. Tietbohl1, R.E. Turner1, B.M. VanWonterghem1, R.J. Wallace1, A. Warrick1, P. Watts3, F. Weber1, P.J. Wegner1, E.A. Williams1 and P.E. Young1
1 Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
2 University of California at Davis, One Shields Avenue, Davis, CA 95616, USA
3 Bechtel Nevada Corporation, Livermore, CA 94550, USA
Deposition of maximum laser energy into a small, high-Z enclosure in a short laser pulse creates a hot environment. Such targets were recently included in an experimental campaign using the first four of the 192 beams of the National Ignition Facility [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technology 26, 755 (1994)], under construction at the University of California Lawrence Livermore National Laboratory. These targets demonstrate good laser coupling, reaching a radiation temperature of 340 eV. In addition, the Raman backscatter spectrum contains features consistent with Brillouin backscatter of Raman forward scatter [A. B. Langdon and D. E. Hinkel, Physical Review Letters 89, 015003 (2002)]. Also, NIF Early Light diagnostics indicate that 20% of the direct backscatter from these reduced-scale targets is in the polarization orthogonal to that of the incident light.
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