Foam-lined hohlraum, inertial confinement fusion experiments on the National Ignition Facility

Moore, A. S.; Meezan, N. B.; Milovich, J.; Johnson, S.; Heredia, R.; Baumann, T. F.; Biener, M.; Bhandarkar, S. D.; Chen, H.; Divol, L.; Izumi, N.; Nikroo, A.; Baker, K.; Jones, O.; Landen, O. L.; Hsing, W. W.; Moody, J. D.; Thomas, C. A.; Lahmann, B.; Williams, J.; Alfonso, N.; Schoff, M. E.

doi:10.1103/physreve.102.051201

Foam-lined hohlraum, inertial confinement fusion experiments on the National Ignition Facility

Journal Article · Wed Nov 18 23:00:00 EST 2020 · Physical Review E

DOI:https://doi.org/10.1103/physreve.102.051201· OSTI ID:1763947

^[1]; Meezan, N. B. ^[1]; Milovich, J. ^[1]; Johnson, S. ^[1]; ^[1]; Baumann, T. F. ^[1]; Biener, M. ^[1]; Bhandarkar, S. D. ^[1]; Chen, H. ^[1]; Divol, L. ^[1]; Izumi, N. ^[1]; Nikroo, A. ^[1]; Baker, K. ^[1]; Jones, O. ^[1]; ^[1]; Hsing, W. W. ^[1]; Moody, J. D. ^[1]; Thomas, C. A. ^[2]; Lahmann, B. ^[3]; Williams, J. ^[4] more »

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
General Atomics, San Diego, CA (United States)

Experiments on the National Ignition Facility (NIF) to study hohlraums lined with a 20-mg/cc 400-μm-thick Ta₂O₅ aerogel at full scale (hohlraum diameter = 6.72 mm) are reported. Driven with a 1.6-MJ, 450-TW laser pulse, the performance of the foam liner is diagnosed using implosion hot-spot symmetry measurements of the high-density carbon (HDC) capsule and measurement of inner beam propagation through a thin-wall 8-μm Au window in the hohlraum. Results show an improved capsule performance due to laser energy deposition further inside the hohlraum, leading to a modest increase in x-ray drive and reduced preheat due to changes in the x-ray spectrum when the foam liner is included. In addition, the outer cone bubble uniformity is improved, but the predicted improvement in inner beam propagation to improve symmetry control is not realized for this foam thickness and density.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; NA0001808

OSTI ID:: 1763947

Report Number(s):: LLNL-JRNL--813463; 1021176

Journal Information:: Physical Review E, Journal Name: Physical Review E Journal Issue: 5 Vol. 102; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Foam-lined hohlraum, inertial confinement fusion experiments on the National Ignition Facility

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References (37)

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