Volume ignition of 3He pellets

Khodabakhsh, R.; Soltanian, Alireza; Amniat-Talab, M.

doi:10.1016/j.nima.2007.08.153

Cited by 4 publications

(3 citation statements)

References 18 publications

(25 reference statements)

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“…In due course, it was elaborated Stening et al, 1992;Khoda-Bakhsh, 1993) that the self-heating by alpha particles can reduce the ignition temperature from about 200 keV down to 23 keV, however, needing compression in the range of 100,000-times the solid state and needing laser energies above 10 MJ in the compressed plasma. It should be mentioned that the reaction of 3 He-3 He arrives at similar results as H-11 B burning (Khoda-Bakhsh et al, 2008). Questions about the stopping length are still under discussion but may lead to some gradual modification only.…”

Section: Introductionmentioning

confidence: 87%

Threshold for laser driven block ignition for fusion energy from hydrogen boron-11

et al. 2009

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Controlled fusion energy from burning hydrogen with boron-11 is of interest because no neutrons are produced. Following the scheme of ignition by spherical irradiation by laser or particle beams, one has to deal with exorbitant conditions of densities and input energies. A new approach following the scheme of block ignition with laser pulses of picosecond (ps) duration and more than petawatt (PW) power led to the possibility of plane geometry irradiation of the fuel using the anomalous effect of block ignition for deuterium tritium (DT) based on updated conditions for the initial computations. We present the extension for H-11 B resulting in a very less dramatic difference to DT than in the case of spherical pellet geometry. Ignition thresholds may be only about one order of magnitude higher and the needed temperatures of about 50 keV are no problem for the skin layer acceleration by nonlinear forces (SLANF) for the block generation.

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Section: Introductionmentioning

confidence: 87%

Threshold for laser driven block ignition for fusion energy from hydrogen boron-11

et al. 2009

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“…A beam with a radius of r b and intensity of I b has a power of w b =I b πr 2 b . For the depth of R b in the range of 0.15 g/cm 2 ≤ R b ≤ 1.2 g/cm 2 the ignition requirements based on Atzeni's work are as below [8] :…”

Section: Introductionmentioning

confidence: 99%

“…The main concept of the fast ignition process is that, at first, the fuel is imploded to high density by laser or some other compression beam types as discussed in Ref. [2]. Next, the energy of ignition is carried to the central area of target very quickly.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Fuel Energy Gain for Tritium-Poor Fuels in Fast Ignition Fusion Approach

Mohadeseh

Ghasemizad

Tabatabaei

2013

Plasma Sci. Technol.

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One of the most fascinating ignition schemes for the inertial fusion energy that might be feasible is fast ignition. Its targets are ignited on the outside surface so there is no need to low density and high temperature center is required by central hot spot ignition. Fast ignition concept is noteworthy for a simple but fundamental reason: In principle it requires less total energy input to achieve ignition. In this paper, fuel energy and fuel energy gain of nearly pure deuterium capsule are calculated. This capsule is ignited by a deuterium-tritium seed, which would reduce the tritium inventory to a few percentages. The variations of fuel energy gain versus fuel density have been studied and submitted. On the basis of different physical parameters the following results of the investigation are presented and discussed. The energy gain curves for different tritium concentrations are found and limiting gain curves are derived. Finally, tritium-poor fast ignitor is compared to equimolar deuterium-tritium fast ignitor.

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Inhibition factor reduces fast ignition threshold for laser fusion using nonlinear force driven block acceleration

Ghoranneviss¹,

Malekynia²,

Hora³

et al. 2008

Laser Part. Beams

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Fast ignition for fusion energy by using petawatt-picosecond (PW-ps) laser pulses was modified due to an anomaly based on extremely clean suppression of prepulses. The resulting plasma blocks with space charge neutral ion current densities above 1011Amp/cm2may be used to ignite deuterium-tritium at densities at or little above solid state density. The difficulty is to produce extremely high energy flux densities of the blocks. Results are reported how the threshold can be reduced by a factor up to fife if the inhibition factor for thermal conductivity due to electric double layers is included in the hydrodynamic analysis.

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Volume ignition of 3He pellets

Cited by 4 publications

References 18 publications

Threshold for laser driven block ignition for fusion energy from hydrogen boron-11

Threshold for laser driven block ignition for fusion energy from hydrogen boron-11

Investigation of Fuel Energy Gain for Tritium-Poor Fuels in Fast Ignition Fusion Approach

Inhibition factor reduces fast ignition threshold for laser fusion using nonlinear force driven block acceleration

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