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Title: Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA

Abstract

Improving the performance of direct-drive cryogenic targets at the Omega Laser Facility requires the development of a new cryogenic system to (i) field non permeable targets with a fill tube, and (ii) provide a clean environment around the target. This capability is to demonstrate that imploding a scaled-down version of the direct-drive–ignition target for the National Ignition Facility (NIF) on the OMEGA laser will generate the hot-spot pressure that is needed for ignition; this will justify future cryogenic direct-drive experiments on the NIF. The paper describes the target, the cryogenic equipment that is being constructed to achieve this goal, and the proposed target delivery process. Thermal calculations, fill-tube–based target designs, and structural/vibrational analyses are provided to demonstrate the credibility of the design. This new design will include capabilities not available (or possible) with the existing OMEGA cryogenic system, with the emphasis being to preserve a pristinely clean environment around the target, and to provide upgraded diagnostics to characterize both the ice layer and the target’s surface. The conceptual design is complete and testing of prototypes and subcomponents is underway. The rationale and capabilities of the new design are discussed.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1431297
Report Number(s):
2016-251, 1388
Journal ID: ISSN 1536-1055; 2016-251, 1388, 2346
Grant/Contract Number:  
NA0001944
Resource Type:
Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Conference: 22nd Target Fabrication Meeting, Las Vegas, NV, 12-16 March 2017.; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Harding, D. R., Ulreich, J., Wittman, M. D., Chapman, R., Taylor, C., Taylor, R., Redden, N. P., Lambropoulos, J. C., Gram, R. Q., Bonino, M. J., and Turner, D. W. Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA. United States: N. p., 2017. Web. doi:10.1080/15361055.2017.1374812.
Harding, D. R., Ulreich, J., Wittman, M. D., Chapman, R., Taylor, C., Taylor, R., Redden, N. P., Lambropoulos, J. C., Gram, R. Q., Bonino, M. J., & Turner, D. W. Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA. United States. doi:10.1080/15361055.2017.1374812.
Harding, D. R., Ulreich, J., Wittman, M. D., Chapman, R., Taylor, C., Taylor, R., Redden, N. P., Lambropoulos, J. C., Gram, R. Q., Bonino, M. J., and Turner, D. W. Wed . "Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA". United States. doi:10.1080/15361055.2017.1374812. https://www.osti.gov/servlets/purl/1431297.
@article{osti_1431297,
title = {Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA},
author = {Harding, D. R. and Ulreich, J. and Wittman, M. D. and Chapman, R. and Taylor, C. and Taylor, R. and Redden, N. P. and Lambropoulos, J. C. and Gram, R. Q. and Bonino, M. J. and Turner, D. W.},
abstractNote = {Improving the performance of direct-drive cryogenic targets at the Omega Laser Facility requires the development of a new cryogenic system to (i) field non permeable targets with a fill tube, and (ii) provide a clean environment around the target. This capability is to demonstrate that imploding a scaled-down version of the direct-drive–ignition target for the National Ignition Facility (NIF) on the OMEGA laser will generate the hot-spot pressure that is needed for ignition; this will justify future cryogenic direct-drive experiments on the NIF. The paper describes the target, the cryogenic equipment that is being constructed to achieve this goal, and the proposed target delivery process. Thermal calculations, fill-tube–based target designs, and structural/vibrational analyses are provided to demonstrate the credibility of the design. This new design will include capabilities not available (or possible) with the existing OMEGA cryogenic system, with the emphasis being to preserve a pristinely clean environment around the target, and to provide upgraded diagnostics to characterize both the ice layer and the target’s surface. The conceptual design is complete and testing of prototypes and subcomponents is underway. The rationale and capabilities of the new design are discussed.},
doi = {10.1080/15361055.2017.1374812},
journal = {Fusion Science and Technology},
number = 3,
volume = 73,
place = {United States},
year = {2017},
month = {12}
}

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