Enhancement of irradiation creep in pulsed fusion reactors

Gurol, H.; Ghoniem, Nasr M.; Wolfer, W.G.

doi:10.1016/0022-3115(82)90773-5

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Limited theoretical and experimental evidence suggests such a scenario to be problematic. [5][6][7] Such an example is for one design neutron source concept utilizing the LANSCE facility [8] whereby a spallation neutron shower caused by an 850 s, 78 Hz beam would result in an effective inpulse damage acceleration. The inherent question in analyzing data emanating from such a source would be whether such an 15x "beam-on" acceleration followed by a longer duration beam-off annealing period would result in representative defect processes and resultant properties.…”

Section: Augmented Requirements and Refinementsmentioning

confidence: 99%

Summary Report on the Refined User Requirements for U.S. Fusion Prototypic Neutron Source

Katoh

Ghoniem

Marian

et al. 2021

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Section: Augmented Requirements and Refinementsmentioning

confidence: 99%

Summary Report on the Refined User Requirements for U.S. Fusion Prototypic Neutron Source

Katoh

Ghoniem

Marian

et al. 2021

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“…Under some conditions the materials response at the same dose and temperature is enhanced, while it is reduced under other conditions, as compared with steady state irradiation. Differences have been demonstrated for irradiation swelling [60][61][62], irradiation creep [63,64], point defect production [57] and irradiation hardening [62]. Under intense pulsed irradiation, the temporal rate of damage production is significantly increased, leading to well known rate effects on the response of materials.…”

Section: Applications To Fusion Materials Researchmentioning

confidence: 99%

The investigation of high intensity laser driven micro neutron sources for fusion materials research at high fluence

Perkins¹,

Logan²,

Rosen³

et al. 2000

Nucl. Fusion

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The application of fast pulse, high intensity lasers to drive low cost DT point neutron sources for fusion materials testing at high flux/fluence is investigated. At present, high power bench-top lasers with intensities of 1018W/cm2 are routinely employed and systems capable of ⩾ 1021 W/cm2 are becoming available. These potentially offer sufficient energy density for efficient neutron production in DT targets with dimensions of around 100 μm. Two different target concepts are analysed - a hot ion, beam-target system and an exploding pusher target system - and neutron emission rates are evaluated as a function of laser and target conditions. Compared with conventional beam-target neutron sources with steady state liquid cooling, the driver energy here is removed by sacrificial vaporization of a small target spot. The resulting small source volumes offer the potential for a low cost, high flux source of 14 MeV neutrons at close coupled, micro (⩽ 1 mm) test specimens. In particular, it is shown that a laser driven target with ∼100 J/pulse at 100 Hz (i.e. ∼10 kW average power) and laser irradiances in the range Iλ2∼1017-1019 W μm2/cm2 could produce primary, uncollided neutron fluxes at the test specimen in the 1014-1015 n cm-2 s-2 range. While focusing on the laser-plasma interaction physics and resulting neutron production, the materials science required to validate computational damage models utilizing ⩾ 100 dpa irradiation of such specimens is also examined; this may provide a multiscale predictive capability for the behaviour of engineering scale components in fusion reactor applications.

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