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Experiments for the Validation of Debris and Shrapnel Calculations.

DE2007917885

Publication Date	2007
Personal Author	Koniges, A. E.; Andrew, J.; Eder, D.; Kalantar, D.; Masters, N.
Page Count	6
Abstract	The debris and shrapnel generated by laser targets are important factors in the operation of a large laser facility such as NIF, LMJ, and Orion. Past experience has shown that it is possible for such target debris to render diagnostics inoperable and also to penetrate or damage optical protection (debris) shields. We are developing the tools to allow evaluation of target configurations in order to better mitigate the generation and impact of debris, including development of dedicated modelling codes. In order to validate these predictive simulations, we briefly describe a series of experiments aimed at determining the amount of debris and/or shrapnel produced in controlled situations. We use glass and aeorgel to capture generated debris/shrapnel. The experimental targets include hohlraums (halfraums) and thin foils in a variety of geometries. Post-shot analysis includes scanning electron microscopy and x-ray tomography. We show the results of some of these experiments and discuss modelling efforts.
Keywords	Shrapnel Debris Lasers Targets Inertial confinement Optics Impact Simulation Electron microscopy Tomography Shields Plasma diagnostics Calculations Evaluation National Ignition Facility(NIF)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Fermi National Accelerator Lab., Batavia, IL.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200806

Experiments for the Validation of Debris and Shrapnel Calculations.

Experiments for the Validation of Debris and Shrapnel Calculations.
DE2007917885

Publication Date	2007
Personal Author	Koniges, A. E.; Andrew, J.; Eder, D.; Kalantar, D.; Masters, N.
Page Count	6
Abstract	The debris and shrapnel generated by laser targets are important factors in the operation of a large laser facility such as NIF, LMJ, and Orion. Past experience has shown that it is possible for such target debris to render diagnostics inoperable and also to penetrate or damage optical protection (debris) shields. We are developing the tools to allow evaluation of target configurations in order to better mitigate the generation and impact of debris, including development of dedicated modelling codes. In order to validate these predictive simulations, we briefly describe a series of experiments aimed at determining the amount of debris and/or shrapnel produced in controlled situations. We use glass and aeorgel to capture generated debris/shrapnel. The experimental targets include hohlraums (halfraums) and thin foils in a variety of geometries. Post-shot analysis includes scanning electron microscopy and x-ray tomography. We show the results of some of these experiments and discuss modelling efforts.
Keywords	Shrapnel Debris Lasers Targets Inertial confinement Optics Impact Simulation Electron microscopy Tomography Shields Plasma diagnostics Calculations Evaluation National Ignition Facility(NIF)
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Fermi National Accelerator Lab., Batavia, IL.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200806