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Title: The role of hot spot mix in the low-foot and high-foot implosions on the NIF

Abstract

Hydrodynamic mix of the ablator into the DT fuel layer and hot spot can be a critical performance limitation in inertial confinement fusion implosions. This mix results in increased radiation loss, cooling of the hot spot, and reduced neutron yield. To quantify the level of mix, we have developed a simple model that infers the level of contamination using the ratio of the measured x-ray emission to the neutron yield. The principal source for the performance limitation of the “low-foot” class of implosions appears to have been mix. As a result, lower convergence “high-foot” implosions are found to be less susceptible to mix, allowing velocities of >380 km/s to be achieved.

Authors:
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, Rochester, NY (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1369464
Alternate Identifier(s):
OSTI ID: 1361898; OSTI ID: 1378879
Report Number(s):
LLNL-JRNL-713703
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
AC02-76SF00515; AC52-07NA27344; NA0001808
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; 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; 42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION

Citation Formats

Ma, T., Patel, P. K., Izumi, N., Springer, P. T., Key, M. H., Atherton, L. J., Barrios, M. A., Benedetti, L. R., Bionta, R., Bond, E., Bradley, D. K., Caggiano, J., Callahan, D. A., Casey, D. T., Celliers, P. M., Cerjan, C. J., Church, J. A., Clark, D. S., Dewald, E. L., Dittrich, T. R., Dixit, S. N., Doppner, T., Dylla-Spears, R., Edgell, D. H., Epstein, R., Field, J., Fittinghoff, D. N., Frenje, J. A., Gatu Johnson, M., Glenn, S., Glenzer, S. H., Grim, G., Guler, N., Haan, S. W., Hammel, B. A., Hatarik, R., Herrmann, H. W., Hicks, D., Hinkel, D. E., Berzak Hopkins, L. F., Hsing, W. W., Hurricane, O. A., Jones, O. S., Kauffman, R., Khan, S. F., Kilkenny, J. D., Kline, J. L., Kozioziemski, B., Kritcher, A., Kyrala, G. A., Landen, O. L., Lindl, J. D., Le Pape, S., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., Meezan, N. B., Merrill, F. E., Moody, J. D., Moses, E. I., Nagel, S. R., Nikroo, A., Pak, A., Parham, T., Park, H. -S., Ralph, J. E., Regan, S. P., Remington, B. A., Robey, H. F., Rosen, M. D., Rygg, J. R., Ross, J. S., Salmonson, J. D., Sater, J., Sayre, D., Schneider, M. B., Shaughnessy, D., Sio, H., Spears, B. K., Smalyuk, V., Suter, L. J., Tommasini, R., Town, R. P. J., Volegov, P. L., Wan, A., Weber, S. V., Widmann, K., Wilde, C. H., Yeamans, C., and Edwards, M. J. The role of hot spot mix in the low-foot and high-foot implosions on the NIF. United States: N. p., 2017. Web. doi:10.1063/1.4983625.
Ma, T., Patel, P. K., Izumi, N., Springer, P. T., Key, M. H., Atherton, L. J., Barrios, M. A., Benedetti, L. R., Bionta, R., Bond, E., Bradley, D. K., Caggiano, J., Callahan, D. A., Casey, D. T., Celliers, P. M., Cerjan, C. J., Church, J. A., Clark, D. S., Dewald, E. L., Dittrich, T. R., Dixit, S. N., Doppner, T., Dylla-Spears, R., Edgell, D. H., Epstein, R., Field, J., Fittinghoff, D. N., Frenje, J. A., Gatu Johnson, M., Glenn, S., Glenzer, S. H., Grim, G., Guler, N., Haan, S. W., Hammel, B. A., Hatarik, R., Herrmann, H. W., Hicks, D., Hinkel, D. E., Berzak Hopkins, L. F., Hsing, W. W., Hurricane, O. A., Jones, O. S., Kauffman, R., Khan, S. F., Kilkenny, J. D., Kline, J. L., Kozioziemski, B., Kritcher, A., Kyrala, G. A., Landen, O. L., Lindl, J. D., Le Pape, S., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., Meezan, N. B., Merrill, F. E., Moody, J. D., Moses, E. I., Nagel, S. R., Nikroo, A., Pak, A., Parham, T., Park, H. -S., Ralph, J. E., Regan, S. P., Remington, B. A., Robey, H. F., Rosen, M. D., Rygg, J. R., Ross, J. S., Salmonson, J. D., Sater, J., Sayre, D., Schneider, M. B., Shaughnessy, D., Sio, H., Spears, B. K., Smalyuk, V., Suter, L. J., Tommasini, R., Town, R. P. J., Volegov, P. L., Wan, A., Weber, S. V., Widmann, K., Wilde, C. H., Yeamans, C., & Edwards, M. J. The role of hot spot mix in the low-foot and high-foot implosions on the NIF. United States. doi:10.1063/1.4983625.
Ma, T., Patel, P. K., Izumi, N., Springer, P. T., Key, M. H., Atherton, L. J., Barrios, M. A., Benedetti, L. R., Bionta, R., Bond, E., Bradley, D. K., Caggiano, J., Callahan, D. A., Casey, D. T., Celliers, P. M., Cerjan, C. J., Church, J. A., Clark, D. S., Dewald, E. L., Dittrich, T. R., Dixit, S. N., Doppner, T., Dylla-Spears, R., Edgell, D. H., Epstein, R., Field, J., Fittinghoff, D. N., Frenje, J. A., Gatu Johnson, M., Glenn, S., Glenzer, S. H., Grim, G., Guler, N., Haan, S. W., Hammel, B. A., Hatarik, R., Herrmann, H. W., Hicks, D., Hinkel, D. E., Berzak Hopkins, L. F., Hsing, W. W., Hurricane, O. A., Jones, O. S., Kauffman, R., Khan, S. F., Kilkenny, J. D., Kline, J. L., Kozioziemski, B., Kritcher, A., Kyrala, G. A., Landen, O. L., Lindl, J. D., Le Pape, S., MacGowan, B. J., Mackinnon, A. J., MacPhee, A. G., Meezan, N. B., Merrill, F. E., Moody, J. D., Moses, E. I., Nagel, S. R., Nikroo, A., Pak, A., Parham, T., Park, H. -S., Ralph, J. E., Regan, S. P., Remington, B. A., Robey, H. F., Rosen, M. D., Rygg, J. R., Ross, J. S., Salmonson, J. D., Sater, J., Sayre, D., Schneider, M. B., Shaughnessy, D., Sio, H., Spears, B. K., Smalyuk, V., Suter, L. J., Tommasini, R., Town, R. P. J., Volegov, P. L., Wan, A., Weber, S. V., Widmann, K., Wilde, C. H., Yeamans, C., and Edwards, M. J. Thu . "The role of hot spot mix in the low-foot and high-foot implosions on the NIF". United States. doi:10.1063/1.4983625. https://www.osti.gov/servlets/purl/1369464.
@article{osti_1369464,
title = {The role of hot spot mix in the low-foot and high-foot implosions on the NIF},
author = {Ma, T. and Patel, P. K. and Izumi, N. and Springer, P. T. and Key, M. H. and Atherton, L. J. and Barrios, M. A. and Benedetti, L. R. and Bionta, R. and Bond, E. and Bradley, D. K. and Caggiano, J. and Callahan, D. A. and Casey, D. T. and Celliers, P. M. and Cerjan, C. J. and Church, J. A. and Clark, D. S. and Dewald, E. L. and Dittrich, T. R. and Dixit, S. N. and Doppner, T. and Dylla-Spears, R. and Edgell, D. H. and Epstein, R. and Field, J. and Fittinghoff, D. N. and Frenje, J. A. and Gatu Johnson, M. and Glenn, S. and Glenzer, S. H. and Grim, G. and Guler, N. and Haan, S. W. and Hammel, B. A. and Hatarik, R. and Herrmann, H. W. and Hicks, D. and Hinkel, D. E. and Berzak Hopkins, L. F. and Hsing, W. W. and Hurricane, O. A. and Jones, O. S. and Kauffman, R. and Khan, S. F. and Kilkenny, J. D. and Kline, J. L. and Kozioziemski, B. and Kritcher, A. and Kyrala, G. A. and Landen, O. L. and Lindl, J. D. and Le Pape, S. and MacGowan, B. J. and Mackinnon, A. J. and MacPhee, A. G. and Meezan, N. B. and Merrill, F. E. and Moody, J. D. and Moses, E. I. and Nagel, S. R. and Nikroo, A. and Pak, A. and Parham, T. and Park, H. -S. and Ralph, J. E. and Regan, S. P. and Remington, B. A. and Robey, H. F. and Rosen, M. D. and Rygg, J. R. and Ross, J. S. and Salmonson, J. D. and Sater, J. and Sayre, D. and Schneider, M. B. and Shaughnessy, D. and Sio, H. and Spears, B. K. and Smalyuk, V. and Suter, L. J. and Tommasini, R. and Town, R. P. J. and Volegov, P. L. and Wan, A. and Weber, S. V. and Widmann, K. and Wilde, C. H. and Yeamans, C. and Edwards, M. J.},
abstractNote = {Hydrodynamic mix of the ablator into the DT fuel layer and hot spot can be a critical performance limitation in inertial confinement fusion implosions. This mix results in increased radiation loss, cooling of the hot spot, and reduced neutron yield. To quantify the level of mix, we have developed a simple model that infers the level of contamination using the ratio of the measured x-ray emission to the neutron yield. The principal source for the performance limitation of the “low-foot” class of implosions appears to have been mix. As a result, lower convergence “high-foot” implosions are found to be less susceptible to mix, allowing velocities of >380 km/s to be achieved.},
doi = {10.1063/1.4983625},
journal = {Physics of Plasmas},
number = 5,
volume = 24,
place = {United States},
year = {2017},
month = {5}
}

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