TY - JOUR
T1 - Effects in CVD diamond exposed to fusion plasmas
AU - Porro, S.
AU - De Temmerman, G.
AU - John, P.
AU - Lisgo, S.
AU - Villalpando, I.
AU - Wilson, J. I B
PY - 2009/9
Y1 - 2009/9
N2 - Micro and nanocrystalline diamond layers have been deposited on molybdenum substrates by hot-filament CVD, and tested in the Mega Amp Spherical Tokamak as a protective coating of fusion plasma-facing materials. The modification of surface properties induced by high density plasma was investigated by SEM, X-ray photoelectron spectroscopy and Raman spectroscopy. Although some modifications of the coating, amorphization and some traces of arcing, diamond proved to be a viable protection as most of the samples were still coated after the plasma exposure. Fuel retention measurements, evaluated by nuclear reaction analysis, showed that a small amount of deuterium was trapped in the surface of the coatings. The chemical erosion of the layers was 50% lower than graphite, as evaluated by dedicated experiments in Pilot-PSI, a linear plasma simulator device. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
AB - Micro and nanocrystalline diamond layers have been deposited on molybdenum substrates by hot-filament CVD, and tested in the Mega Amp Spherical Tokamak as a protective coating of fusion plasma-facing materials. The modification of surface properties induced by high density plasma was investigated by SEM, X-ray photoelectron spectroscopy and Raman spectroscopy. Although some modifications of the coating, amorphization and some traces of arcing, diamond proved to be a viable protection as most of the samples were still coated after the plasma exposure. Fuel retention measurements, evaluated by nuclear reaction analysis, showed that a small amount of deuterium was trapped in the surface of the coatings. The chemical erosion of the layers was 50% lower than graphite, as evaluated by dedicated experiments in Pilot-PSI, a linear plasma simulator device. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
UR - http://www.scopus.com/inward/record.url?scp=70349090535&partnerID=8YFLogxK
U2 - 10.1002/pssa.200982201
DO - 10.1002/pssa.200982201
M3 - Article
SN - 1862-6300
VL - 206
SP - 2028
EP - 2032
JO - Physica Status Solidi (A) Applications and Materials Science
JF - Physica Status Solidi (A) Applications and Materials Science
IS - 9
ER -