Dr. Jeffery F. Latkowski Profile

Dr. Jeffery F. Latkowski

at Lawrence Livermore National Lab

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 18 February 2011 Paper

Experimental study of high-Z gas buffers in gas-filled ICF engines

M. Rhodes, J. Kane, G. Loosmore, J. DeMuth, J. Latkowski

Proceedings Volume 7916, 791604 (2011) https://doi.org/10.1117/12.877185

KEYWORDS: Plasma, Xenon, Ions, Fusion energy, Inductance, Diagnostics, X-rays, Magnetism, Ionization, Capacitors

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Proceedings Article | 18 February 2011 Paper

Modeling of the LIFE minichamber Xe theta pinch experiment

J. Kane, M. Rhodes, G. Loosmore, J. Latkowski, J. Koning, M. Patel, H. Scott, G. Zimmerman, J. Demuth, G. Moses

Proceedings Volume 7916, 791605 (2011) https://doi.org/10.1117/12.877264

KEYWORDS: Plasma, Xenon, 3D modeling, Circuit switching, Tellurium, Opacity, Ions, Data modeling, Thermal modeling, Thomson scattering

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Proceedings Article | 23 July 1999 Paper

Constraints on target chamber first wall and target designs that will enable NIF debris shields to survive

Alan Burnham, Michel Gerassimenko, J. Scott, Jeff Latkowski, Pamela Whitman, Francois Genin, Wilthea Hibbard, P. Peterson, R. Tokheim, D. Curran

Proceedings Volume 3492, (1999) https://doi.org/10.1117/12.354187

KEYWORDS: Contamination, National Ignition Facility, X-rays, Metals, Aluminum, Gold, Iron, Silicon, Foam, Copper

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The NIF target chamber interior materials and target designs themselves have to be compatible with survival of the final- optics debris shields. To meet the planned maintenance and refinishing rate, the contamination of the debris shields cannot exceed about 1 nm equivalent thickness per shot of total material. This implies that he target mass must be limited to no more than 1 gram and the ablated mass released to the chamber from all other components must not exceed 3 grams. In addition, the targets themselves must either completely vaporize or send any minor amounts of shrapnel towards the chamber waist to prevent excessive catering of the debris shields. The constraints on the first-wall debris will remobilize at a rate fast enough to require cleaning every 3 weeks, about three times more frequent than possible with planned robotics. Furthermore, a comparison of ablatants from B₄C and stainless-steel louvers suggest that remobilization of target debris by x-rays will be greater than that of the base material in both cases, thereby reducing the performance advantage of clean B₄C over much cheaper stainless steel. Neutronics calculations indicate that activation of thin Ni-free stainless steel is not a significant source of maintenance personnel radiation dose. Consequently, the most attractive first wall design consists of stainless-steel louvers. Evaluation of various unconverted-light beam dump designs indicates that stainless steel louvers generate no more debris than other matrices, so one single design can serve as both first wall and beam dumps, eliminating beam steering restrictions caused by size and location of the beam dumps. One reservation is that the allowable contamination rate of the debris shield is not yet completely understood. Consequently, it is likely that either a protruding beam tube, a rapid post-shot gas purge of the final optics assembly, or thin polymeric pre-shield will be required to prevent low-velocity contamination from reaching the debris shield.

Conference Committee Involvement (1)

High Power Lasers for Fusion Research

26 January 2011 | San Francisco, California, United States

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