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National Ignition Facility Final Optics Assembly Thermal Effects of Maintenance Operations

National Ignition Facility Final Optics Assembly Thermal Effects of Maintenance Operations
Author:
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Total Pages:
Release: 2006
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ISBN:

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The National Ignition Facility (NIF), the world's most powerful laser system, is being built at Lawrence Livermore National Laboratory (LLNL) to study inertial fusion and high-energy-density science. This billion-dollar facility consists of 192 beams focusing 1.8 MJ on a fusion target. The Final Optics Assembly (FOA), the last mechanical apparatus before the target chamber, converts the light from an incoming frequency of 1 [omega] to ia target-ready 3 [omega], and focuses the laser beam. The performance of the frequency conversion crystals is very sensitive to temperature changes; crystal temperature must be maintained within a 0.1 C of a nominal temperature prior to a laser shot. Maximizing system availability requires minimizing thermal recovery times after thermal disturbances occurring in both normal and maintenance operations. To guide the design, it is important to have estimates of those recovery times. This report presents Computational Fluid Dynamics (CFD) design calculations to evaluate thermal effects of maintenance operations.


Final Optics Damage Inspection (FODI) for the National Ignition Facility

Final Optics Damage Inspection (FODI) for the National Ignition Facility
Author:
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Total Pages: 14
Release: 2007
Genre:
ISBN:

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The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory (LLNL) will routinely fire high energy shots (approaching 10 kJ per beamline) through the final optics, located on the target chamber. After a high fluence shot, exceeding 4J/cm2 at 351 nm wavelength, the final optics will be inspected for laser-induced damage. The FODI (Final Optics Damage Inspection) system has been developed for this purpose, with requirements to detect laser-induced damage initiation and to track and size it's the growth to the point at which the optic is removed and the site mitigated. The FODI system is the 'corner stone' of the NIF optic recycle strategy. We will describe the FODI system and discuss the challenges to make optics inspection a routine part of NIF operations.


Debris Characterization Diagnostic for the National Ignition Facility

Debris Characterization Diagnostic for the National Ignition Facility
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Total Pages:
Release: 2000
Genre:
ISBN:

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Generation of debris from targets and by x-ray ablation of surrounding materials will be a matter of concern for experimenters and the operations staff at the National Ignition Facility (NIF). Target chamber and final optics protection, for example debris shield damage, and efficient facility operation drive the interest for the NIF staff. Experimenters are primarily concerned with diagnostic survivability, separation of mechanical versus radiation induced test object response in the case of effects tests, and radiation transport through the debris field when the net radiation output is used to benchmark computer codes. In addition, radiochemical analysis of activated capsule debris during ignition shots can provide a measure of the ablator. Conceptual design of the Debris Monitor and Rad-Chem Station, one of the NIF core diagnostics, is presented. Methods of debris collection, particle size and mass analysis, impulse measurement, and radiochemical analysis are given. A description of recent experiments involving debris collection and impulse measurement on the OMEGA and Pharos lasers is also provided.


An Assessment of the Prospects for Inertial Fusion Energy

An Assessment of the Prospects for Inertial Fusion Energy
Author: National Research Council
Publisher: National Academies Press
Total Pages: 247
Release: 2013-07-05
Genre: Science
ISBN: 0309272246

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The potential for using fusion energy to produce commercial electric power was first explored in the 1950s. Harnessing fusion energy offers the prospect of a nearly carbon-free energy source with a virtually unlimited supply of fuel. Unlike nuclear fission plants, appropriately designed fusion power plants would not produce the large amounts of high-level nuclear waste that requires long-term disposal. Due to these prospects, many nations have initiated research and development (R&D) programs aimed at developing fusion as an energy source. Two R&D approaches are being explored: magnetic fusion energy (MFE) and inertial fusion energy (IFE). An Assessment of the Prospects for Inertial Fusion Energy describes and assesses the current status of IFE research in the United States; compares the various technical approaches to IFE; and identifies the scientific and engineering challenges associated with developing inertial confinement fusion (ICF) in particular as an energy source. It also provides guidance on an R&D roadmap at the conceptual level for a national program focusing on the design and construction of an inertial fusion energy demonstration plant.


Inertial Confinement Fusion

Inertial Confinement Fusion
Author:
Publisher:
Total Pages: 734
Release: 1997
Genre: Inertial confinement fusion
ISBN:

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Science & Technology Review

Science & Technology Review
Author:
Publisher:
Total Pages: 282
Release: 2015
Genre: Military research
ISBN:

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Energy Research Abstracts

Energy Research Abstracts
Author:
Publisher:
Total Pages: 664
Release: 1989
Genre: Power resources
ISBN:

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NBS Special Publication

NBS Special Publication
Author:
Publisher:
Total Pages: 1064
Release: 1971
Genre: Weights and measures
ISBN:

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