Measurement of hydrodynamic instability growth during the deceleration of an inertial confinement fusion implosion

Pickworth, L.; Smalyuk, V. A.; Hammel, B. A.; Weber, Chris; Clark, Daniel; Robey, H. F.; MacPhee, A. G.; Pape, S. Le; Casey, D. T.; Berzak-Hopkins, L.; Zylstra, A. B.; Kritcher, Andrea; Walters, C. F.; Bhandarkar, S. D.; Stadermann, Michael; Johnson, S.; Dı́az, Belén Dı́az; Ratledge, M.; Alfonso, N.; Landen, O. L.; Pak, A.; Izumi, N.; Khan, S. F.; Benedetti, L. R.; Lahmann, B.; Hartouni, E. P.

doi:10.1016/j.hedp.2020.100817

Cited by 5 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even for a perfectly clean DT hot spot, P m i x = 0, the radiated Bremsstrahlung power is higher than the power from fusion alpha heating for ion temperatures below ~ 4.3 keV. Our HDC shell uses tungsten (Z = 74) to reduce ablator decompression from preheating, however this material also radiates significantly when it enters the hot core through instability growth from individual seeds due to surface particles 27 , shell defects 28 , or engineering features like the fill tube 8 or tent support 29 , 30 . As a result of these isolated sources, we can infer the fraction of x-ray radiation from mix by isolating the high spatial frequency bright features visible in the x-ray images as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

Ralph,

Ross,

Zylstra

et al. 2024

Nat Commun

Self Cite

View full text Add to dashboard Cite

Indirect Drive Inertial Confinement Fusion Experiments on the National Ignition Facility (NIF) have achieved a burning plasma state with neutron yields exceeding 170 kJ, roughly 3 times the prior record and a necessary stage for igniting plasmas. The results are achieved despite multiple sources of degradations that lead to high variability in performance. Results shown here, for the first time, include an empirical correction factor for mode-2 asymmetry in the burning plasma regime in addition to previously determined corrections for radiative mix and mode-1. Analysis shows that including these three corrections alone accounts for the measured fusion performance variability in the two highest performing experimental campaigns on the NIF to within error. Here we quantify the performance sensitivity to mode-2 symmetry in the burning plasma regime and apply the results, in the form of an empirical correction to a 1D performance model. Furthermore, we find the sensitivity to mode-2 determined through a series of integrated 2D radiation hydrodynamic simulations to be consistent with the experimentally determined sensitivity only when including alpha-heating.

show abstract

Section: Resultsmentioning

confidence: 99%

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

Ralph,

Ross,

Zylstra

et al. 2024

Nat Commun

Self Cite

View full text Add to dashboard Cite

show abstract

“…Even for a perfectly clean DT hot spot, Pmix = 0, the radiated Bremsstrahlung power is higher than the power from fusion alpha heating for ion temperatures below ∼4.3 keV. Our HDC shell uses tungsten (Z = 74) to reduce ablator decompression from preheating, however this material also radiates significantly when it enters the hot core through instability growth from individual seeds due to surface particles 25 , shell defects 26 , or engineering features like the fill tube 8 or tent support 27,28 . As a result of these isolated sources, we can infer the fraction of x-ray radiation from mix by isolating the high spatial frequency bright features visible in the x-ray images as shown in Fig.…”

mentioning

confidence: 99%

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

Ralph,

Ross,

Zylstra

et al. 2024

Preprint

View full text Add to dashboard Cite

Indirect Drive Inertial Confinement Fusion Experiments on the National Ignition Facility (NIF) have achieved a burning plasma state with neutron yields exceeding 170 kJ1, 2 , roughly 3 times the prior record and a necessary stage for igniting plasmas. The results are achieved despite multiple sources of degradations that lead to high variability in performance. Results shown here, for the first time, include an empirical correction factor for mode-2 asymmetry in the burning plasma regime in addition to previously deter- mined corrections for radiative mix and mode-1. Analysis shows that including these three corrections alone accounts for the measured fusion performance variability in the two highest performing experimental campaigns on the NIF to within error. In this work we quantify the performance sensitivity to mode-2 symmetry in the burning plasma regime and apply the results, in the form of an em-pirical correction to a 1D performance model. Furthermore, we find the sensitivity to mode-2 determined through a series of integrated 2D radiation hydrodynamic simulations to be consistent with the experimentally determined sensitivity only when including alpha-heating.

show abstract

Acoustic field switching of piezoelectric device for microsphere diameter sorting

Feng

Wang²,

Yan³

et al. 2023

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Measurement of hydrodynamic instability growth during the deceleration of an inertial confinement fusion implosion

Cited by 5 publications

References 29 publications

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

The impact of low-mode symmetry on inertial fusion energy output in the burning plasma state

Acoustic field switching of piezoelectric device for microsphere diameter sorting

Contact Info

Product

Resources

About