Accommodation of prompt alpha-particle loss in a compact stellarator power plant

Raffray, A.R.; Mau, T.K.; Najmabadi, F.

doi:10.1016/j.jnucmat.2007.01.167

Cited by 3 publications

(2 citation statements)

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“…This is important as it not only represents a loss of heating power in the core, but more importantly, it adds to the heat load and particle flux on the plasma facing components [11]. The high heat flux accommodation could be provided by designing divertor-like modules.…”

Section: Plasma Facing Componentsmentioning

confidence: 99%

“…A possible solution would be to use an engineered W armor with a low porosity nanostructure which could enhance the release of He. Clearly, this is a key issue for a CS, which needs to be further studied to make sure that a credible solution exists both in terms of the alpha physics, the selection of armor material and configuration, and better characterization of the He behavior under prototypic conditions [11].…”

Section: Plasma Facing Componentsmentioning

confidence: 99%

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Engineering challenges in designing an attractive compact stellarator power plant

Raffray

El-Guebaly

Ihli

et al. 2007

Fusion Engineering and Design

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Section: Plasma Facing Componentsmentioning

confidence: 99%

Section: Plasma Facing Componentsmentioning

confidence: 99%

Engineering challenges in designing an attractive compact stellarator power plant

Raffray

El-Guebaly

Ihli

et al. 2007

Fusion Engineering and Design

Self Cite

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Resonant alpha particle loss in stellarators

White

2022

Physics of Plasmas

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Particle resonances in stellarators can produce islands in the space of passing particle orbits without the presence of an unstable Alfvén mode, provided the period of the resonance matches the period of the equilibrium magnetic field. In this case, the equilibrium itself plays the role of a mode amplitude, and the islands appear on surfaces where the orbital helicity matches the field period. At low energy, these surfaces are given by the field line helicity, but at higher energy, cross field drift causes them to move. The resonances are also felt by trapped particles bouncing back and forth on surfaces with matching helicity. The periodic variation of B along these orbits produces local wells, giving loss due to drift while trapped in a well. Stellarator designs that have equilibrium-induced resonance islands exhibit anomalous alpha particle loss and are unsuitable for reactors.

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