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Title: An Overview of the Target Fabrication Operations at Lawrence Livermore National Laboratory

Abstract

The Target Engineering team at Lawrence Livermore National Laboratory (LLNL) builds precision laser targets for the National Ignition Facility (NIF) and the Omega Laser in Rochester, NY, and other experimental facilities. The physics requirements demand precision in these targets, which creates a constant need for innovative manufacturing processes. As experimental diagnostics improve, there is greater demand for precision in fabrication, assembly, metrology, and documentation of as-built targets. The team specializes in meso-scale fabrication with core competencies in diamond turning, assembly, and metrology. Figure 1 shows a typical diamond turning center. The team builds over 200 laser targets per year in batches of five to fifteen targets. Thus, all are small-lot custom builds, and most are novel designs requiring engineering and process development. Component materials are metals, polymers and low density aerogel foams. Custom fixturing is used to locate parts on the Diamond Turning Machines (DTM) and assembly stations. This ensures parts can be repeatably located during manufacturing operations. Most target builds involve a series of fabricating one surface with features and then relocating the components on another fixture to finish the opposite side of the component. These components are then assembled to complete multiple-component targets. These targets are typically builtmore » one at a time. Cost and efficiency are issues with production of targets, and the team is developing batch processing techniques to meet precision target specifications and cost goals. Three example target builds will highlight some of the fabrication and material issues faced at LLNL. A low temperature Rayleigh Taylor target shows how multiple precision targets can be fabricated out of a single large disk. The ignition double shell targets highlight the required manufacturing complexity. A low density aerogel target highlights some material handling and assembly issues. The metrology requirements for these targets typically include absolute size, thickness and feature location, which is very challenging. Our team is always looking to other fields for similar operations where we can learn and apply new techniques to fabricating targets.« less

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
15015890
Report Number(s):
UCRL-PROC-210896
TRN: US0501680
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: ASPE Spring Topical Meeting 2005, Columbus, OH (US), 04/18/2005--04/19/2005; Other Information: PBD: 23 Mar 2005
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCURACY; DIAMONDS; DOCUMENTATION; EFFICIENCY; FABRICATION; IGNITION; LASER TARGETS; LASERS; MANUFACTURING; PHYSICS; POLYMERS; SPECIFICATIONS; TARGETS; THICKNESS; US NATIONAL IGNITION FACILITY

Citation Formats

Hibbard, R L, and Bono, M J. An Overview of the Target Fabrication Operations at Lawrence Livermore National Laboratory. United States: N. p., 2005. Web.
Hibbard, R L, & Bono, M J. An Overview of the Target Fabrication Operations at Lawrence Livermore National Laboratory. United States.
Hibbard, R L, and Bono, M J. 2005. "An Overview of the Target Fabrication Operations at Lawrence Livermore National Laboratory". United States. https://www.osti.gov/servlets/purl/15015890.
@article{osti_15015890,
title = {An Overview of the Target Fabrication Operations at Lawrence Livermore National Laboratory},
author = {Hibbard, R L and Bono, M J},
abstractNote = {The Target Engineering team at Lawrence Livermore National Laboratory (LLNL) builds precision laser targets for the National Ignition Facility (NIF) and the Omega Laser in Rochester, NY, and other experimental facilities. The physics requirements demand precision in these targets, which creates a constant need for innovative manufacturing processes. As experimental diagnostics improve, there is greater demand for precision in fabrication, assembly, metrology, and documentation of as-built targets. The team specializes in meso-scale fabrication with core competencies in diamond turning, assembly, and metrology. Figure 1 shows a typical diamond turning center. The team builds over 200 laser targets per year in batches of five to fifteen targets. Thus, all are small-lot custom builds, and most are novel designs requiring engineering and process development. Component materials are metals, polymers and low density aerogel foams. Custom fixturing is used to locate parts on the Diamond Turning Machines (DTM) and assembly stations. This ensures parts can be repeatably located during manufacturing operations. Most target builds involve a series of fabricating one surface with features and then relocating the components on another fixture to finish the opposite side of the component. These components are then assembled to complete multiple-component targets. These targets are typically built one at a time. Cost and efficiency are issues with production of targets, and the team is developing batch processing techniques to meet precision target specifications and cost goals. Three example target builds will highlight some of the fabrication and material issues faced at LLNL. A low temperature Rayleigh Taylor target shows how multiple precision targets can be fabricated out of a single large disk. The ignition double shell targets highlight the required manufacturing complexity. A low density aerogel target highlights some material handling and assembly issues. The metrology requirements for these targets typically include absolute size, thickness and feature location, which is very challenging. Our team is always looking to other fields for similar operations where we can learn and apply new techniques to fabricating targets.},
doi = {},
url = {https://www.osti.gov/biblio/15015890}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 23 00:00:00 EST 2005},
month = {Wed Mar 23 00:00:00 EST 2005}
}

Conference:
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