Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility

Goyon, C.; Datte, P. S.; Buscho, J. G.; Butler, N. J.; Hernandez, J. E.; Hohenberger, M.; Lechleiter, B. L.; Michel, P.; Ross, J. S.; Bell, P. M.; Moody, J. D.

doi:10.1063/1.5038094

Title: Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility

Abstract

Supra-thermal (>100 keV) electrons generated by laser plasma interactions can be detrimental to the performance of ignition experiments conducted on the National Ignition Facility (NIF). On a NIF shot, the amount of electrons is estimated by measuring the hard X-rays passing through the hohlraum wall. The primary sources of hot electrons in a hohlraum are Stimulated Raman Scattering (SRS) and two plasmon decay (TPD). While SRS is well diagnosed on the NIF, there has been no diagnosis of TPD. Here we have designed and implemented a new diagnostic to characterize the time history of TPD on the NIF. The instrument provides a time resolved measurement of the 3/2 ω harmonic emission which is indicative of the presence of TPD. We describe the diagnostic setup, calibration, and the preliminary results obtained on NIF hohlraum experiments. Finally, we find evidence of a correlation between measured hard X-rays generated from the hot electron bremsstrahlung and the TPD emission.

Authors:

^[1]; Datte, P. S. ^[1]; Buscho, J. G. ^[1]; Butler, N. J. ^[1]; Hernandez, J. E. ^[1];

^[1]; Lechleiter, B. L. ^[1]; Michel, P. ^[1]; Ross, J. S. ^[1]; Bell, P. M. ^[1]; Moody, J. D. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Mon Aug 13 00:00:00 EDT 2018

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1482873

Alternate Identifier(s):: OSTI ID: 1464321

Report Number(s):: LLNL-JRNL-750292
Journal ID: ISSN 0034-6748; 935261

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 89; Journal Issue: 8; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; plasmons; plasma waves; laser fusion; plasma confinement; X-ray spectroscopy; hard X-rays; Raman scattering; phototubes; laser plasma interactions

Citation Formats


                    Goyon, C., Datte, P. S., Buscho, J. G., Butler, N. J., Hernandez, J. E., Hohenberger, M., Lechleiter, B. L., Michel, P., Ross, J. S., Bell, P. M., and Moody, J. D. Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5038094.

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                    Goyon, C., Datte, P. S., Buscho, J. G., Butler, N. J., Hernandez, J. E., Hohenberger, M., Lechleiter, B. L., Michel, P., Ross, J. S., Bell, P. M., & Moody, J. D. Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility.  United States.  https://doi.org/10.1063/1.5038094

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                    Goyon, C., Datte, P. S., Buscho, J. G., Butler, N. J., Hernandez, J. E., Hohenberger, M., Lechleiter, B. L., Michel, P., Ross, J. S., Bell, P. M., and Moody, J. D. Mon .  
"Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility".  United States.  https://doi.org/10.1063/1.5038094.  https://www.osti.gov/servlets/purl/1482873.

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@article{osti_1482873,

  title        = {Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility},

  author       = {Goyon, C. and Datte, P. S. and Buscho, J. G. and Butler, N. J. and Hernandez, J. E. and Hohenberger, M. and Lechleiter, B. L. and Michel, P. and Ross, J. S. and Bell, P. M. and Moody, J. D.},

  abstractNote = {Supra-thermal (>100 keV) electrons generated by laser plasma interactions can be detrimental to the performance of ignition experiments conducted on the National Ignition Facility (NIF). On a NIF shot, the amount of electrons is estimated by measuring the hard X-rays passing through the hohlraum wall. The primary sources of hot electrons in a hohlraum are Stimulated Raman Scattering (SRS) and two plasmon decay (TPD). While SRS is well diagnosed on the NIF, there has been no diagnosis of TPD. Here we have designed and implemented a new diagnostic to characterize the time history of TPD on the NIF. The instrument provides a time resolved measurement of the 3/2 ω harmonic emission which is indicative of the presence of TPD. We describe the diagnostic setup, calibration, and the preliminary results obtained on NIF hohlraum experiments. Finally, we find evidence of a correlation between measured hard X-rays generated from the hot electron bremsstrahlung and the TPD emission.},

  doi          = {10.1063/1.5038094},

  journal      = {Review of Scientific Instruments},

  number       = 8,

  volume       = 89,

  place        = {United States},

  year         = {Mon Aug 13 00:00:00 EDT 2018},

  month        = {Mon Aug 13 00:00:00 EDT 2018}

}

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Works referenced in this record:

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Simulated performance of the optical Thomson scattering diagnostic designed for the National Ignition Facility
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Title: Time resolved detection of two-plasmon decay using three-halves harmonic emission on the National Ignition Facility

Abstract

Citation Formats

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journal, January 2018

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