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Title: Experiments to explore the influence of pulse shaping at the National Ignition Facility

Abstract

The shaping of the drive pulse in time is a key tool in the design of fusion experiments that use inertia to confine burning plasmas. It is directly related to the adiabat and compressibility of the DT fuel, and the characteristics of the laser and target that are needed to ignite. With this in mind, we have performed experiments at the National Ignition Facility that test small changes in the shape of the pulse. In contrast to theory, we find implosions at lower adiabats can have reduced yield and areal density. We discuss implications to performance and the mechanism(s) that could be responsible.

Authors:
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Publication Date:
DOE Contract Number:  
NA0003856; AC52-07NA27344
Research Org.:
Univ. of Rochester, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1886859
DOI:
https://doi.org/10.7910/DVN/ZZ5O7S

Citation Formats

Thomas, C. A., Campbell, E. M., Baker, K. L., Casey, D. T., Hohenberger, M., Kritcher, A. L., Spears, B. K., Khan, S. F., Nora, R., Woods, D. T., Milovich, J. L., Berger, R. L., Strozzi, D., Ho, D. D., Clark, D., Bachmann, B., Benedetti, L. R., Bionta, R., Celliers, P. M., Fittinghoff, D. N., Grim, G., Hatarik, R., Izumi, N., Kyrala, G., Ma, T., Millot, M., Nagel, S. R., Patel, P. K., Yeamans, C., Nikroo, A., Tabak, M., Johnson, M. Gatu, Volegov, P. L., and Finnegan, S. M. Experiments to explore the influence of pulse shaping at the National Ignition Facility. United States: N. p., 2021. Web. doi:10.7910/DVN/ZZ5O7S.
Thomas, C. A., Campbell, E. M., Baker, K. L., Casey, D. T., Hohenberger, M., Kritcher, A. L., Spears, B. K., Khan, S. F., Nora, R., Woods, D. T., Milovich, J. L., Berger, R. L., Strozzi, D., Ho, D. D., Clark, D., Bachmann, B., Benedetti, L. R., Bionta, R., Celliers, P. M., Fittinghoff, D. N., Grim, G., Hatarik, R., Izumi, N., Kyrala, G., Ma, T., Millot, M., Nagel, S. R., Patel, P. K., Yeamans, C., Nikroo, A., Tabak, M., Johnson, M. Gatu, Volegov, P. L., & Finnegan, S. M. Experiments to explore the influence of pulse shaping at the National Ignition Facility. United States. doi:https://doi.org/10.7910/DVN/ZZ5O7S
Thomas, C. A., Campbell, E. M., Baker, K. L., Casey, D. T., Hohenberger, M., Kritcher, A. L., Spears, B. K., Khan, S. F., Nora, R., Woods, D. T., Milovich, J. L., Berger, R. L., Strozzi, D., Ho, D. D., Clark, D., Bachmann, B., Benedetti, L. R., Bionta, R., Celliers, P. M., Fittinghoff, D. N., Grim, G., Hatarik, R., Izumi, N., Kyrala, G., Ma, T., Millot, M., Nagel, S. R., Patel, P. K., Yeamans, C., Nikroo, A., Tabak, M., Johnson, M. Gatu, Volegov, P. L., and Finnegan, S. M. 2021. "Experiments to explore the influence of pulse shaping at the National Ignition Facility". United States. doi:https://doi.org/10.7910/DVN/ZZ5O7S. https://www.osti.gov/servlets/purl/1886859. Pub date:Fri Jun 25 00:00:00 EDT 2021
@article{osti_1886859,
title = {Experiments to explore the influence of pulse shaping at the National Ignition Facility},
author = {Thomas, C. A. and Campbell, E. M. and Baker, K. L. and Casey, D. T. and Hohenberger, M. and Kritcher, A. L. and Spears, B. K. and Khan, S. F. and Nora, R. and Woods, D. T. and Milovich, J. L. and Berger, R. L. and Strozzi, D. and Ho, D. D. and Clark, D. and Bachmann, B. and Benedetti, L. R. and Bionta, R. and Celliers, P. M. and Fittinghoff, D. N. and Grim, G. and Hatarik, R. and Izumi, N. and Kyrala, G. and Ma, T. and Millot, M. and Nagel, S. R. and Patel, P. K. and Yeamans, C. and Nikroo, A. and Tabak, M. and Johnson, M. Gatu and Volegov, P. L. and Finnegan, S. M.},
abstractNote = {The shaping of the drive pulse in time is a key tool in the design of fusion experiments that use inertia to confine burning plasmas. It is directly related to the adiabat and compressibility of the DT fuel, and the characteristics of the laser and target that are needed to ignite. With this in mind, we have performed experiments at the National Ignition Facility that test small changes in the shape of the pulse. In contrast to theory, we find implosions at lower adiabats can have reduced yield and areal density. We discuss implications to performance and the mechanism(s) that could be responsible.},
doi = {10.7910/DVN/ZZ5O7S},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {6}
}

Works referencing / citing this record:

Experiments to explore the influence of pulse shaping at the National Ignition Facility
journal, November 2020