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Title: Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA

Abstract

Although the overall function of a campaign’s primary target design may remain unchanged, the components and structure often evolve from one shot day to the next to better meet experimental goals. The target fabrication engineer’s involvement in this evolution can be important for advising modifications in order to improve and simplify assembly at the same time. Highly complex targets are constructed by General Atomics (GA) for astrophysics experiments conducted by the University of Chicago at the OMEGA laser facility. Several novel target components are fabricated, precision-assembled, and extensively measured in support of this campaign, and have evolved over the last three years to improve both the science and assembly. Examples include unique laser machined polyimide grids to enhance plasma mixing at target center, precision micromachined cylindrical shields that also act as component spacers, drawn glass target supports to suspend physics packages at critical distances, and tilted pinholes for collimated proton radiography. Target component fabrication and evolution details for this turbulent dynamics (TDYNO) campaign are presented, along with precision-assembly techniques, metrology methods, and considerations for future TDYNO experiments on OMEGA.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [4]
  1. General Atomics, San Diego, CA (United States)
  2. Univ. of Chicago, IL (United States)
  3. Univ. of Oxford (United Kingdom)
  4. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Dept. of Energy (DOE), Washington DC (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
OSTI Identifier:
1568883
Grant/Contract Number:  
NA0001808; NA0002724; SC0016566; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 79 ASTRONOMY AND ASTROPHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Turbulent dynamics; OMEGA targets; National Laser Users’ Facility program

Citation Formats

Muller, S. A., Kaczala, D. N., Abu-Shawareb, H. M., Alfonso, E. L., Carlson, L. C., Mauldin, M., Fitzsimmons, P., Lamb, D., Tzeferacos, P., Chen, L., Gregori, G., Rigby, A., Bott, A., White, T. G., Froula, D., and Katz, J. Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA. United States: N. p., 2017. Web. doi:10.1080/15361055.2017.1396097.
Muller, S. A., Kaczala, D. N., Abu-Shawareb, H. M., Alfonso, E. L., Carlson, L. C., Mauldin, M., Fitzsimmons, P., Lamb, D., Tzeferacos, P., Chen, L., Gregori, G., Rigby, A., Bott, A., White, T. G., Froula, D., & Katz, J. Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA. United States. doi:10.1080/15361055.2017.1396097.
Muller, S. A., Kaczala, D. N., Abu-Shawareb, H. M., Alfonso, E. L., Carlson, L. C., Mauldin, M., Fitzsimmons, P., Lamb, D., Tzeferacos, P., Chen, L., Gregori, G., Rigby, A., Bott, A., White, T. G., Froula, D., and Katz, J. Wed . "Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA". United States. doi:10.1080/15361055.2017.1396097. https://www.osti.gov/servlets/purl/1568883.
@article{osti_1568883,
title = {Evolution of the Design and Fabrication of Astrophysics Targets for Turbulent Dynamo (TDYNO) Experiments on OMEGA},
author = {Muller, S. A. and Kaczala, D. N. and Abu-Shawareb, H. M. and Alfonso, E. L. and Carlson, L. C. and Mauldin, M. and Fitzsimmons, P. and Lamb, D. and Tzeferacos, P. and Chen, L. and Gregori, G. and Rigby, A. and Bott, A. and White, T. G. and Froula, D. and Katz, J.},
abstractNote = {Although the overall function of a campaign’s primary target design may remain unchanged, the components and structure often evolve from one shot day to the next to better meet experimental goals. The target fabrication engineer’s involvement in this evolution can be important for advising modifications in order to improve and simplify assembly at the same time. Highly complex targets are constructed by General Atomics (GA) for astrophysics experiments conducted by the University of Chicago at the OMEGA laser facility. Several novel target components are fabricated, precision-assembled, and extensively measured in support of this campaign, and have evolved over the last three years to improve both the science and assembly. Examples include unique laser machined polyimide grids to enhance plasma mixing at target center, precision micromachined cylindrical shields that also act as component spacers, drawn glass target supports to suspend physics packages at critical distances, and tilted pinholes for collimated proton radiography. Target component fabrication and evolution details for this turbulent dynamics (TDYNO) campaign are presented, along with precision-assembly techniques, metrology methods, and considerations for future TDYNO experiments on OMEGA.},
doi = {10.1080/15361055.2017.1396097},
journal = {Fusion Science and Technology},
number = 3,
volume = 73,
place = {United States},
year = {2017},
month = {12}
}

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