M. Murakami, H. Nagatomo, T. Johzaki, K. Shigemori, Y. Hironaka, T. Watari, Y. Arinaga, T. Norimatsu, H. Shiraga, H. Azechi, M. Karasik, J. Weaver, Y. Aglitskiy, A. Velikovich, S. Zalesak, J. Bates, A. Schmitt, J. Sethian, S. Obenschain


Progresses of Impact Ignition

Date of publication:

Nov. 2010

Key words:

22 IAEA Fusion Energy Conference, IFE/P6-04


In impact ignition scheme [1], a portion of the fuel (the impactor) is accelerated to a super-high velocity (Fig.1), compressed by convergence, and collided with a precompressed main fuel. This collision generates shock waves in both the impactor and the main fuel. Since the density of the impactor is generally much lower than that of the main fuel, the pressure balance ensures that the shock-heated temperature of the impactor is significantly higher than that of the main fuel. Hence, the impactor can reach ignition temperature and thus become an igniter. Here we report major new results on recent impact ignition research: (1) A maximum velocity ~ 1000 km/s has been achieved under the operation of NIKE KrF laser at Naval Research Laboratory (laser wavelength = 0.25mu m) in the use of a planar target made of plastic and (2) We have performed two-dimensional simulation for burn and ignition to show the feasibility of the impact ignition.

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