Fusion energy with lasers, direct drive targets, and dry wall chambers

doi:10.1088/0029-5515/43/12/015

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Nuclear Fusion Volume 43 Number 12 Create an alert RSS this journal

J.D. Sethian et al 2003 Nucl. Fusion 43 1693 doi:10.1088/0029-5515/43/12/015

Fusion energy with lasers, direct drive targets, and dry wall chambers

J.D. Sethian¹, M. Friedman¹, R.H. Lehmberg¹, M. Myers¹, S.P. Obenschain¹, J. Giuliani¹, P. Kepple¹, A.J. Schmitt¹, D. Colombant¹, J. Gardner¹, F. Hegeler², M. Wolford³, S.B. Swanekamp⁴, D. Weidenheimer⁵, D. Welch⁶, D. Rose⁶, S. Payne⁷, C. Bibeau⁷, A. Baraymian⁷, R. Beach⁷, K. Schaffers⁷, B. Freitas⁷, K. Skulina⁷, W. Meier⁷, J. Latkowski⁷, L.J. Perkins⁷, D. Goodin⁸, R. Petzoldt⁸, E. Stephens⁸, F. Najmabadi⁹, M. Tillack⁹, R. Raffray⁹, Z. Dragojlovic⁹, D. Haynes¹⁰, R. Peterson¹⁰, G. Kulcinski¹⁰, J. Hoffer¹¹, D. Geller¹¹, D. Schroen¹², J. Streit¹², C. Olson¹³, T. Tanaka¹³, T. Renk¹³, G. Rochau¹³, L. Snead¹⁴, N. Ghoneim¹⁵ and G. Lucas¹⁶

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sethian@this.nrl.navy.mil

¹ Plasma Physics Division, Naval Research Laboratory, Washington, DC, USA
² Commonwealth Technology, Inc. Alexandria, VA, USA
³ SAIC, McLean, VA, USA
⁴ JAYCOR, Alexandria, VA, USA
⁵ Titan Pulse Sciences Division, San Leandro, CA, USA
⁶ Mission Research Corporation, Albuquerque, NM, USA
⁷ Lawrence Livermore National Laboratory, Livermore, CA, USA
⁸ General Atomics, San Diego, CA, USA
⁹ University of California, San Diego, CA, USA
¹⁰ University of Wisconsin, Madison, WI, USA
¹¹ Los Alamos National Laboratory, Los Alamos, NM, USA
¹² Schafer Corp., Albuquerque, NM, USA
¹³ Sandia National Laboratories, Albuquerque, NM, USA
¹⁴ Oak Ridge National Laboratory, Oak Ridge, TN, USA
¹⁵ University of California Los Angeles, Los Angeles, CA, USA
¹⁶ University of Santa Barbara, Santa Barbara, CA, USA

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Abstract References Cited By

A coordinated, focused effort is underway to develop Laser Inertial Fusion Energy. The key components are developed in concert with one another and the science and engineering issues are addressed concurrently. Recent advances include: target designs have been evaluated that show it could be possible to achieve the high gains (>100) needed for a practical fusion system.These designs feature a low-density CH foam that is wicked with solid DT and over-coated with a thin high-Z layer. These results have been verified with three independent one-dimensional codes, and are now being evaluated with two- and three-dimensional codes. Two types of lasers are under development: Krypton Fluoride (KrF) gas lasers and Diode Pumped Solid State Lasers (DPSSL). Both have recently achieved repetitive 'first light', and both have made progress in meeting the fusion energy requirements for durability, efficiency, and cost. This paper also presents the advances in development of chamber operating windows (target survival plus no wall erosion), final optics (aluminium at grazing incidence has high reflectivity and exceeds the required laser damage threshold), target fabrication (demonstration of smooth DT ice layers grown over foams, batch production of foam shells, and appropriate high-Z overcoats), and target injection (new facility for target injection and tracking studies).

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