dorsal/arxiv
View SchemaCharacterisation of carbon dust produced in sputtering discharges and in the Tore Supra tokamak
| Authors | Cécile Arnas, Claire Dominique, Pascale Roubin, Céline Martin, Christophe Brosset, Bernard Pégourié |
|---|---|
| Categories | |
| ArXiv ID | physics/0604222 |
| URL | https://arxiv.org/abs/physics/0604222 |
| DOI | 10.1016/j.jnucmat.2006.02.097 |
Abstract
The sputtering of inside wall components of tokamaks can lead to the injection of supersaturated vapour in the plasma edge. The resulting condensation favours the formation of clusters which can give rise to solid particulates by further accretion. Sputtering discharges are proposed to have highlight on the formation of carbonaceous dust observed in the tokamaks with graphite based wall components. The flux of the sputtered carbon atoms is evaluated in the conditions of our laboratory discharges as well as the evolution of their energy distribution. It is shown that a cooling mechanism occurs through collisions with the discharge argon atoms, leading to a nucleation phase. A comparison between the carbon structure of the resulting dust particles and a dust sample collected in the Tore Supra tokamak is proposed. The structural differences are discussed and can be correlated to specific plasma conditions.
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"abstract": "The sputtering of inside wall components of tokamaks can lead to the\ninjection of supersaturated vapour in the plasma edge. The resulting\ncondensation favours the formation of clusters which can give rise to solid\nparticulates by further accretion. Sputtering discharges are proposed to have\nhighlight on the formation of carbonaceous dust observed in the tokamaks with\ngraphite based wall components. The flux of the sputtered carbon atoms is\nevaluated in the conditions of our laboratory discharges as well as the\nevolution of their energy distribution. It is shown that a cooling mechanism\noccurs through collisions with the discharge argon atoms, leading to a\nnucleation phase. A comparison between the carbon structure of the resulting\ndust particles and a dust sample collected in the Tore Supra tokamak is\nproposed. The structural differences are discussed and can be correlated to\nspecific plasma conditions.",
"arxiv_id": "physics/0604222",
"authors": [
"C\u00e9cile Arnas",
"Claire Dominique",
"Pascale Roubin",
"C\u00e9line Martin",
"Christophe Brosset",
"Bernard P\u00e9gouri\u00e9"
],
"categories": [
"physics.plasm-ph"
],
"doi": "10.1016/j.jnucmat.2006.02.097",
"title": "Characterisation of carbon dust produced in sputtering discharges and in the Tore Supra tokamak",
"url": "https://arxiv.org/abs/physics/0604222"
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