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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[sub 2]/[sup 3]He-gas-filled implosions with trace deuterium are used to show that yield and ion temperature (T[sub ion]) from 1.6mm-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 1D simulations. Using data from D[sub 2]/[sup 3]He-gas-filled implosions, yield at a set T[sub ion] is experimentally verified to increase with capsule size. Uniform D[sup 3]He-proton spectra from 3mm-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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Publication Date:
DOE Contract Number:  
NA0001857; NA0002949; NA0002905; FG02-88ER40387; NA0001808
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Ohio Univ., Athens, OH (United States); General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1878749
DOI:
https://doi.org/10.7910/DVN/UTFQQE

Citation Formats

Johnson, M. Gatu, 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:10.7910/DVN/UTFQQE.
Johnson, M. Gatu, 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:https://doi.org/10.7910/DVN/UTFQQE
Johnson, M. Gatu, 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. 2018. "Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments". United States. doi:https://doi.org/10.7910/DVN/UTFQQE. https://www.osti.gov/servlets/purl/1878749. Pub date:Wed Oct 03 00:00:00 EDT 2018
@article{osti_1878749,
title = {Optimization of a high-yield, low-areal-density fusion product source at the National Ignition Facility with applications in nucleosynthesis experiments},
author = {Johnson, M. Gatu 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 T[sub 2]/[sup 3]He-gas-filled implosions with trace deuterium are used to show that yield and ion temperature (T[sub ion]) from 1.6mm-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 1D simulations. Using data from D[sub 2]/[sup 3]He-gas-filled implosions, yield at a set T[sub ion] is experimentally verified to increase with capsule size. Uniform D[sup 3]He-proton spectra from 3mm-outer-diameter CH shell implosions demonstrate the utility of this platform for studying charged-particle-producing reactions relevant to stellar nucleosynthesis.},
doi = {10.7910/DVN/UTFQQE},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}

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