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Title: Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma

Abstract

Inertial confinement fusion approaches involve the creation of high-energy-density states through compression. High gain scenarios may be enabled by the beneficial heating from fast electrons produced with an intense laser and by energy containment with a high-strength magnetic field. Here, we report experimental measurements from a configuration integrating a magnetized, imploded cylindrical plasma and intense laser-driven electrons as well as multi-stage simulations that show fast electrons transport pathways at different times during the implosion and quantify their energy deposition contribution. The experiment consisted of a CH foam cylinder, inside an external coaxial magnetic field of 5 T, that was imploded using 36 OMEGA laser beams. Two-dimensional (2D) hydrodynamic modelling predicts the CH density reaches 9.0 g cm–3, the temperature reaches 920 eV and the external B-field is amplified at maximum compression to 580 T. At pre-determined times during the compression, the intense OMEGA EP laser irradiated one end of the cylinder to accelerate relativistic electrons into the dense imploded plasma providing additional heating. The relativistic electron beam generation was simulated using a 2D particle-in-cell (PIC) code. Finally, three-dimensional hybrid-PIC simulations calculated the electron propagation and energy deposition inside the target and revealed the roles the compressed and self-generated B-fields playmore » in transport. During a time window before the maximum compression time, the self-generated B-field on the compression front confines the injected electrons inside the target, increasing the temperature through Joule heating. For a stronger B-field seed of 20 T, the electrons are predicted to be guided into the compressed target and provide additional collisional heating.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [2]; ORCiD logo [10];  [10];  [2];  [11];  [11];  [1] more »;  [1]; ORCiD logo [1] « less
  1. Center for Energy Research, University of California San Diego, La Jolla, CA 92093-0417, USA
  2. Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA
  3. E.T.S.I. Industriales, Universidad Politecnica de Madrid, Madrid 28040, Spain
  4. Office National d’Etudes et de Recherches Aérospatiales (ONERA), Palaiseau 91123, France
  5. Sandia National Laboratories, Albuquerque, NM 87185, USA
  6. Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA, Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
  7. Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623, USA, General Atomics, San Diego, CA 92186, USA
  8. General Atomics, San Diego, CA 92186, USA
  9. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA, Extreme State Physics Laboratory, University of Rochester, Rochester, NY 14627, USA
  10. Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
  11. Université de Bordeaux-CNRS-CEA, CELIA UMR, 5107 33400 Talence, France
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF)
OSTI Identifier:
1734406
Alternate Identifier(s):
OSTI ID: 1784756; OSTI ID: 1810355
Report Number(s):
SAND-2021-7750J
Journal ID: ISSN 1364-503X
Grant/Contract Number:  
536203; NA0003842; NA0003943; NA-0003525; ACI-1548562; PHY180053; B632670; AC04-94AL85000
Resource Type:
Published Article
Journal Name:
Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences
Additional Journal Information:
Journal Name: Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences Journal Volume: 379 Journal Issue: 2189; Journal ID: ISSN 1364-503X
Publisher:
The Royal Society
Country of Publication:
United Kingdom
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICF; fast electrons; compression

Citation Formats

Kawahito, D., Bailly-Grandvaux, M., Dozières, M., McGuffey, C., Forestier-Colleoni, P., Peebles, J., Honrubia, J. J., Khiar, B., Hansen, S., Tzeferacos, P., Wei, M. S., Krauland, C. M., Gourdain, P., Davies, J. R., Matsuo, K., Fujioka, S., Campbell, E. M., Santos, J. J., Batani, D., Bhutwala, K., Zhang, S., and Beg, F. N.. Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma. United Kingdom: N. p., 2020. Web. https://doi.org/10.1098/rsta.2020.0052.
Kawahito, D., Bailly-Grandvaux, M., Dozières, M., McGuffey, C., Forestier-Colleoni, P., Peebles, J., Honrubia, J. J., Khiar, B., Hansen, S., Tzeferacos, P., Wei, M. S., Krauland, C. M., Gourdain, P., Davies, J. R., Matsuo, K., Fujioka, S., Campbell, E. M., Santos, J. J., Batani, D., Bhutwala, K., Zhang, S., & Beg, F. N.. Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma. United Kingdom. https://doi.org/10.1098/rsta.2020.0052
Kawahito, D., Bailly-Grandvaux, M., Dozières, M., McGuffey, C., Forestier-Colleoni, P., Peebles, J., Honrubia, J. J., Khiar, B., Hansen, S., Tzeferacos, P., Wei, M. S., Krauland, C. M., Gourdain, P., Davies, J. R., Matsuo, K., Fujioka, S., Campbell, E. M., Santos, J. J., Batani, D., Bhutwala, K., Zhang, S., and Beg, F. N.. Mon . "Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma". United Kingdom. https://doi.org/10.1098/rsta.2020.0052.
@article{osti_1734406,
title = {Fast electron transport dynamics and energy deposition in magnetized, imploded cylindrical plasma},
author = {Kawahito, D. and Bailly-Grandvaux, M. and Dozières, M. and McGuffey, C. and Forestier-Colleoni, P. and Peebles, J. and Honrubia, J. J. and Khiar, B. and Hansen, S. and Tzeferacos, P. and Wei, M. S. and Krauland, C. M. and Gourdain, P. and Davies, J. R. and Matsuo, K. and Fujioka, S. and Campbell, E. M. and Santos, J. J. and Batani, D. and Bhutwala, K. and Zhang, S. and Beg, F. N.},
abstractNote = {Inertial confinement fusion approaches involve the creation of high-energy-density states through compression. High gain scenarios may be enabled by the beneficial heating from fast electrons produced with an intense laser and by energy containment with a high-strength magnetic field. Here, we report experimental measurements from a configuration integrating a magnetized, imploded cylindrical plasma and intense laser-driven electrons as well as multi-stage simulations that show fast electrons transport pathways at different times during the implosion and quantify their energy deposition contribution. The experiment consisted of a CH foam cylinder, inside an external coaxial magnetic field of 5 T, that was imploded using 36 OMEGA laser beams. Two-dimensional (2D) hydrodynamic modelling predicts the CH density reaches 9.0 g cm–3, the temperature reaches 920 eV and the external B-field is amplified at maximum compression to 580 T. At pre-determined times during the compression, the intense OMEGA EP laser irradiated one end of the cylinder to accelerate relativistic electrons into the dense imploded plasma providing additional heating. The relativistic electron beam generation was simulated using a 2D particle-in-cell (PIC) code. Finally, three-dimensional hybrid-PIC simulations calculated the electron propagation and energy deposition inside the target and revealed the roles the compressed and self-generated B-fields play in transport. During a time window before the maximum compression time, the self-generated B-field on the compression front confines the injected electrons inside the target, increasing the temperature through Joule heating. For a stronger B-field seed of 20 T, the electrons are predicted to be guided into the compressed target and provide additional collisional heating.},
doi = {10.1098/rsta.2020.0052},
journal = {Philosophical Transactions of the Royal Society. A, Mathematical, Physical and Engineering Sciences},
number = 2189,
volume = 379,
place = {United Kingdom},
year = {2020},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1098/rsta.2020.0052

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