ESCAPE OF Α PARTICLES FROM a LASER-PULSE-INITIATED THERMONUCLEAR REACTION

Крохин, О. Н.; Розанов, В. Б.

doi:10.1070/qe1973v002n04abeh004476

Cited by 63 publications

(68 citation statements)

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“…The assumption was made that most of the alpha particles slow down within the hot spot, and that the alpha-particle energy deposited inside the hot spot is close to 100% ͑ Ϸ 1͒. Since the alpha-energy deposition in the hot spot depends on its areal density and temperature, 21 we have computed the hot spot areal densities and hot spot temperature for the marginally ignited targets in our simulation database. Figure 7 shows the hot spot areal density and temperature at marginal ignition from the 1D simulations discussed in Sec.…”

Section: Alpha-particle Confinementmentioning

confidence: 99%

A measurable Lawson criterion and hydro-equivalent curves for inertial confinement fusion

Zhou

Betti

2008

Physics of Plasmas

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It is shown that the ignition condition (Lawson criterion) for inertial confinement fusion (ICF) can be cast in a form dependent on the only two parameters of the compressed fuel assembly that can be measured with existing techniques: the hot spot ion temperature (Tih) and the total areal density (ρRtot), which includes the cold shell contribution. A marginal ignition curve is derived in the ρRtot, Tih plane and current implosion experiments are compared with the ignition curve. On this plane, hydrodynamic equivalent curves show how a given implosion would perform with respect to the ignition condition when scaled up in the laser-driver energy. For 3<⟨Tih⟩n<6keV, an approximate form of the ignition condition (typical of laser-driven ICF) is ⟨Tih⟩n2.6⋅⟨ρRtot⟩n>50keV2.6⋅g∕cm2, where ⟨ρRtot⟩n and ⟨Tih⟩n are the burn-averaged total areal density and hot spot ion temperature, respectively. Both quantities are calculated without accounting for the alpha-particle energy deposition. Such a criterion can be used to determine how surrogate D2 and subignited DT target implosions perform with respect to the one-dimensional ignition threshold.

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Section: Alpha-particle Confinementmentioning

confidence: 99%

A measurable Lawson criterion and hydro-equivalent curves for inertial confinement fusion

Zhou

Betti

2008

Physics of Plasmas

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“…In this paper, the analysis is carried out in dimensionless form and the results are applicable to all targets, large or small, direct-drive or indirect-drive as long as the ignition parameter χ α is calculated using Eq. (13). For the high-foot shot N140120 [20] that achieved a yield of about 9.3×10…”

Section: 9mentioning

confidence: 99%

Alpha Heating and Burning Plasmas in Inertial Confinement Fusion

et al. 2015

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“…Using the values for the W i 's given in Fig. 2, and the fact that m ranges from 1 at TϷ25 keV to 0 at TϾ50 keV and nϷ3/2 over all the temperature range, 14 it can be seen that only the radiation term (1/2Ϫm)W R can be neglected in Eq. ͑11͒.…”

Section: A 0-d Model For Hot Spot Trajectoriesmentioning

confidence: 97%

Inertial confinement fusion ignition criteria, critical profiles, and burn wave propagation using self-similar solutions

Kishony¹,

Waxman²,

Shvarts³

1997

Physics of Plasmas

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The ignition conditions, under which a thermonuclear burn wave propagates from an initial hot spot, and the characteristics of the propagating burn wave are investigated using a set of self-similar solutions. Although the self-similar solutions exist only for external density profile that decreases as ρout∝r−1, they are shown to provide natural ignition criteria and critical profiles for more general density profiles. The concept of working lines (WLs), attractors of trajectories in the ρR−T plane of propagating burn waves, is introduced for density profiles ρout∝r−ω. The WLs are found to be close and almost parallel to the ignition line (IL). The distance of the WLs from the IL is given analytically and shown to depend on all the physical processes involved. The spatial profiles of a burn wave propagating along the WLs are shown to be closely related to the self-similar critical profiles.

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ESCAPE OF Α PARTICLES FROM a LASER-PULSE-INITIATED THERMONUCLEAR REACTION

Cited by 63 publications

References 0 publications

A measurable Lawson criterion and hydro-equivalent curves for inertial confinement fusion

A measurable Lawson criterion and hydro-equivalent curves for inertial confinement fusion

Alpha Heating and Burning Plasmas in Inertial Confinement Fusion

Inertial confinement fusion ignition criteria, critical profiles, and burn wave propagation using self-similar solutions

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