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Session CO1 - Compression and Burn.
ORAL session, Monday afternoon, November 15
Room 201/202, SCC

[CO1.009] Measurements of Time Evolution of Ion Temperature of D^3He Implosions on OMEGA

J.A. Frenje, C.K. Li, F.H. Seguin, J. L. DeCiantis, J. R. Rygg, M. Falk, R.D. Petrasso (MIT), J. A. Delettrez, V. Yu. Glebov, C. Stoeckl, F. J. Marshall, D. D. Meyerhofer, T. C. Sangster, V. A. Smalyuk, J. M. Soures (Laboratory for Laser Energetics, U. of Rochester)

We report here the first measurements of time evolution of ion temperature T_i(t) during the shock-burn and compression-burn phases of direct-drive D^3He implosions on the 60-beam, UV OMEGA laser system. The experiments were accomplished using a proton temporal diagnostic (PTD) to measure the D^3He-reaction rate, and a neutron temporal diagnostic (NTD) to measure the DD-reaction rate. By taking the ratio of the measured burn histories, and initially assuming n_i and T_i profiles upon which we iterate, a final T_i(t) can be inferred for the entire burn. The results from these measurements are compared to numerical simulations.

This work was performed in part at the LLE NLUF, and supported in part by the U.S. Department of Energy (DE-FG03-03SF22691, DE-FG03-03NA00058, and Cooperative Agreement DE-FC52-92SF19460), LLE (412160-001G), and LLNL (B504974).

Part C of program listing