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| Home > Publications database > Time resolved imaging of laser induced ablation spectroscopy (LIAS) in TEXTOR and comparison with modeling |
| Home > Publications database > Time resolved imaging of laser induced ablation spectroscopy (LIAS) in TEXTOR and comparison with modeling |
| Journal Article | FZJ-2016-01606 |
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2016
IoP Publ.
Bristol
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Please use a persistent id in citations: doi:10.1088/0031-8949/T167/1/014034
Abstract: Laser based methods are investigated as in situ diagnostic for plasma facing materials (PFMs) in magnetic fusion research to study PFM composition and retention. In laser induced ablation spectroscopy (LIAS) the wall material is ablated by a laser beam. The released material enters the edge plasma region of a fusion experiment and the resulting optical emission is observed. To conclude from the observed photons to the number of ablated atoms, a detailed knowledge of the velocity distribution of the ablated material is required. In this work the LIAS emission in discharges at TEXTOR was studied using an Ametek Phantom v711 camera. In this paper a method is developed to conclude from the observed emission the velocity distribution of the ablated species. The obtained velocity distribution is used for our numerical LIAS model, demonstrating good agreement with our experimental observations. Implications are discussed.
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