### Session CO6: Fast Ignition I

2:00 PM–4:48 PM, Monday, November 8, 2010
Room: Columbus GH

Chair: Brian Albright, Los Alamos National Laboratory

Abstract ID: BAPS.2010.DPP.CO6.1

### Abstract: CO6.00001 : Fast Ignition Relevant Hot Electron coupling at 1$\omega$ and 2$\omega$

2:00 PM–2:12 PM

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#### Authors:

D.P. Higginson
(UCSD/LLNL)

C.D. Chen
(LLNL)

T. Ma
(LLNL)

P.K. Patel
(LLNL)

H. McLean
(LLNL)

M. Key
(LLNL)

S. Wilks
(LLNL)

T. Bartal
(UCSD)

(UCSD)

C. Jarrot
(UCSD)

T. Yabuuchi
(UCSD)

F.N. Beg
(UCSD)

R.B. Stephens
(GA)

E. Giraldez
(GA)

K. Flippo
(LANL)

S. Gaillard
(LANL)

P.A. Norreys
(CLF (UK))

S. Baton
(LULI (France))

F. Perez
(LULI (France))

H.-P. Schlenvoigt
(LULI (France))

G.E. Kemp
(OSU)

A. Krygier
(OSU)

R.R. Freeman
(OSU)

L.D. Van Woerkom
(OSU)

2$\omega$ lasers ($\lambda=0.5\mu$m) are expected to create favorable hot electron temperatures for fast ignition and to reduce the electron transit distance to the core due to high intensity-contrast ratios of better than $10^{-10}$. These two effects were isolated by comparing a high contrast 2$\omega$ laser (pico2000) against 1$\omega$ lasers at both low (Titan) and high contrast (Trident). Identical cone-wire targets (Au cones with Cu wires) were used to evaluate laser coupling of fast ignition relevant hot electrons into the wire. Calibrated diagnostics imaged and measured absolute K shell fluorescence from the wire. Coupling is found to increase by a factor of 2 in the high contrast case and electron temperature increased with $I\lambda^2$. Analysis was performed with hybrid PIC transport code ZUMA to infer absolute electron coupling. This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and DE-AC52 07NA27344(ACE).

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DPP.CO6.1