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Title: Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments

Abstract

Polar-direct-drive exploding pushers are used as a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications including diagnostic calibration, nuclear security, backlighting, electron-ion equilibration, and nucleosynthesis-relevant experiments. In this paper, two different paths to improving the performance of this platform are explored: (i) optimizing the laser drive, and (ii) optimizing the target. While the present study is specifically geared towards nucleosynthesis experiments, the results are generally applicable. Example data from T 2/ 3He-gas-filled implosions with trace deuterium are used to show that yield and ion temperature (Tion) from 1.6 mm-outer-diameter thin-glass-shell capsule implosions are improved at a set laser energy by switching from a ramped to a square laser pulse shape, and that increased laser energy further improves yield and Tion, although by factors lower than predicted by 1 D simulations. Using data from D2-3He-gas-filled implosions, yield at a set Tion is experimentally verified to increase with capsule size. Uniform D-3He-proton spectra from 3 mm-outer-diameter CH shell implosions demonstrate the utility of this platform for studying charged-particle-producing reactions relevant to stellar nucleosynthesis.

Authors:
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  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Indiana Univ., Bloomington, IN (United States). Dept. of Physics
  5. Ohio Univ., Athens, OH (United States). Dept. of Physics and Astronomy
  6. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  7. General Atomics, San Diego, CA (United States)
  8. AWE plc, Aldermaston, Reading (United Kingdom)
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1427024
Alternate Identifier(s):
OSTI ID: 1425248; OSTI ID: 1458697
Report Number(s):
LLNL-JRNL-742103
Journal ID: ISSN 1070-664X
Grant/Contract Number:
NA0002949; FG02-88ER40387; NA-0001808; NA0001857; NA0002905; AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Gatu Johnson, M., Casey, D. T., Hohenberger, M., Zylstra, A. B., Bacher, A., Brune, C. R., Bionta, R. M., Craxton, R. S., Ellison, C. L., Farrell, M., Frenje, J. A., Garbett, W., Garcia, E. M., Grim, G. P., Hartouni, E., Hatarik, R., Herrmann, H. W., Hohensee, M., Holunga, D. M., Hoppe, M., Jackson, M., Kabadi, N., Khan, S. F., Kilkenny, J. D., Kohut, T. R., Lahmann, B., Le, H. P., Li, C. K., Masse, L., McKenty, P. W., McNabb, D. P., Nikroo, A., Parham, T. G., Parker, C. E., Petrasso, R. D., Pino, J., Remington, B., Rice, N. G., Rinderknecht, H. G., Rosenberg, M. J., Sanchez, J., Sayre, D. B., Schoff, M. E., Shuldberg, C. M., Séguin, F. H., Sio, H., Walters, Z. B., and Whitley, H. D.. Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments. United States: N. p., 2018. Web. doi:10.1063/1.5017746.
Gatu Johnson, M., Casey, D. T., Hohenberger, M., Zylstra, A. B., Bacher, A., Brune, C. R., Bionta, R. M., Craxton, R. S., Ellison, C. L., Farrell, M., Frenje, J. A., Garbett, W., Garcia, E. M., Grim, G. P., Hartouni, E., Hatarik, R., Herrmann, H. W., Hohensee, M., Holunga, D. M., Hoppe, M., Jackson, M., Kabadi, N., Khan, S. F., Kilkenny, J. D., Kohut, T. R., Lahmann, B., Le, H. P., Li, C. K., Masse, L., McKenty, P. W., McNabb, D. P., Nikroo, A., Parham, T. G., Parker, C. E., Petrasso, R. D., Pino, J., Remington, B., Rice, N. G., Rinderknecht, H. G., Rosenberg, M. J., Sanchez, J., Sayre, D. B., Schoff, M. E., Shuldberg, C. M., Séguin, F. H., Sio, H., Walters, Z. B., & Whitley, H. D.. Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments. United States. doi:10.1063/1.5017746.
Gatu Johnson, M., Casey, D. T., Hohenberger, M., Zylstra, A. B., Bacher, A., Brune, C. R., Bionta, R. M., Craxton, R. S., Ellison, C. L., Farrell, M., Frenje, J. A., Garbett, W., Garcia, E. M., Grim, G. P., Hartouni, E., Hatarik, R., Herrmann, H. W., Hohensee, M., Holunga, D. M., Hoppe, M., Jackson, M., Kabadi, N., Khan, S. F., Kilkenny, J. D., Kohut, T. R., Lahmann, B., Le, H. P., Li, C. K., Masse, L., McKenty, P. W., McNabb, D. P., Nikroo, A., Parham, T. G., Parker, C. E., Petrasso, R. D., Pino, J., Remington, B., Rice, N. G., Rinderknecht, H. G., Rosenberg, M. J., Sanchez, J., Sayre, D. B., Schoff, M. E., Shuldberg, C. M., Séguin, F. H., Sio, H., Walters, Z. B., and Whitley, H. D.. Wed . "Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments". United States. doi:10.1063/1.5017746.
@article{osti_1427024,
title = {Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments},
author = {Gatu Johnson, M. and Casey, D. T. and Hohenberger, M. and Zylstra, A. B. and Bacher, A. and Brune, C. R. and Bionta, R. M. and Craxton, R. S. and Ellison, C. L. and Farrell, M. and Frenje, J. A. and Garbett, W. and Garcia, E. M. and Grim, G. P. and Hartouni, E. and Hatarik, R. and Herrmann, H. W. and Hohensee, M. and Holunga, D. M. and Hoppe, M. and Jackson, M. and Kabadi, N. and Khan, S. F. and Kilkenny, J. D. and Kohut, T. R. and Lahmann, B. and Le, H. P. and Li, C. K. and Masse, L. and McKenty, P. W. and McNabb, D. P. and Nikroo, A. and Parham, T. G. and Parker, C. E. and Petrasso, R. D. and Pino, J. and Remington, B. and Rice, N. G. and Rinderknecht, H. G. and Rosenberg, M. J. and Sanchez, J. and Sayre, D. B. and Schoff, M. E. and Shuldberg, C. M. and Séguin, F. H. and Sio, H. and Walters, Z. B. and Whitley, H. D.},
abstractNote = {Polar-direct-drive exploding pushers are used as a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications including diagnostic calibration, nuclear security, backlighting, electron-ion equilibration, and nucleosynthesis-relevant experiments. In this paper, two different paths to improving the performance of this platform are explored: (i) optimizing the laser drive, and (ii) optimizing the target. While the present study is specifically geared towards nucleosynthesis experiments, the results are generally applicable. Example data from T2/3He-gas-filled implosions with trace deuterium are used to show that yield and ion temperature (Tion) from 1.6 mm-outer-diameter thin-glass-shell capsule implosions are improved at a set laser energy by switching from a ramped to a square laser pulse shape, and that increased laser energy further improves yield and Tion, although by factors lower than predicted by 1 D simulations. Using data from D2-3He-gas-filled implosions, yield at a set Tion is experimentally verified to increase with capsule size. Uniform D-3He-proton spectra from 3 mm-outer-diameter CH shell implosions demonstrate the utility of this platform for studying charged-particle-producing reactions relevant to stellar nucleosynthesis.},
doi = {10.1063/1.5017746},
journal = {Physics of Plasmas},
number = 5,
volume = 25,
place = {United States},
year = {Wed May 09 00:00:00 EDT 2018},
month = {Wed May 09 00:00:00 EDT 2018}
}

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