Experimental study of pulse plasma-carbon materials interaction during the simulation of thermal quench phase of tokamak plasma disruption

Barabash, V.; Baranov, A. G.; Gahl, J.M.; Litunovsky, V.L.; McDonald, J.M.; Ovchinnikov, I.

doi:10.1016/0022-3115(92)90510-r

Cited by 17 publications

(1 citation statement)

References 2 publications

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“…Experimental measurements [22,23] and calculations [24] indicate that a very high density shielding layer is created when such a powerful plasma stream interacts with a material surface. The layer consists of ionized eroded material and cooled stream plasma, and the very important role of this layer is that it accumulates and dissipates 2 90% of all kinetic energy of the stream; so, only 5 10% of the plasma stream kinetic energy reaches the surface.…”

Section: Mect Of Plasma Impactmentioning

confidence: 99%

Graphite as a structural material for the in-vessel components for plasma diagnostics in the millimeter and sub-millimeter ranges

Berezhnyj

Skibenko

Ocheretenko

et al. 2001

Plasma Devices and Operations

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The possibility to use the carbon-graphite materials (CGM) instead of metals for fabrication of the in-vessel components for plasma diagnostics in the mm and sub-mm ranges on large-scale fusion devices was investigated. The reflectivity of different kinds of CGMs (more than 20) was measured in the wavelength range of 10 pm-30mm and was found to be only little below the values for metal analogues. The effects of surface roughness, pulsed plasma impact, heating and neutron irradiation on the retlectivity of CGM-made reflectors were analyzed. The role of graphite protection of the first wall in the energy balance in a fusion reactor was evaluated using the reflectivity data obtained. The working characteristics of antennae, waveguides and resonator fabricated of CGMs are presented as measured before and after pulsed plasma impact and/or heating up to 1 oooc.The CGM-made diagnostic components demonstrated much stronger resistance to pulsed power plasma impact than metal-made ones and at the same time reasonable working characteristics. Therefore they can successfully replace the metallic components in cases when similar (h., CGM) materials are used for the first wall protection.

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Section: Mect Of Plasma Impactmentioning

confidence: 99%