Observation and analysis of pellet material del B drift on MAST

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/50/10/105002· OSTI ID:1056904

Garzotti, L ^[1]; Baylor, Larry R ^[2]; Kochi, F ^[3]; Pegourie, B ^[4]; Valovic, M ^[1]; Axon, K B ^[1]; Dowling, J ^[1]; Guri, C ^[1]; Maddison, G P ^[1]; Nehme, H ^[4]; O'Gorman, T ^[1]; Patel, A ^[1]; Price, M ^[1]; Scannell, R ^[1]; Walsh, M ^[1]

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1. EURATOM, Culham Sci Ctr, Abingdon, Oxon England
2. ORNL
3. Austrian Academy of Sciences, Vienna, Austria
4. CEA Cadarache, St. Paul lex Durance, France

Pellet material deposited in a tokamak plasma experiences a drift towards the low field side of the torus induced by the magnetic field gradient. Plasma fuelling in ITER relies on the beneficial effect of this drift to increase the pellet deposition depth and fuelling efficiency. It is therefore important to analyse this phenomenon in present machines to improve the understanding of the del B induced drift and the accuracy of the predictions for ITER. This paper presents a detailed analysis of pellet material drift in MAST pellet injection experiments based on the unique diagnostic capabilities available on this machine and compares the observations with predictions of state-of-the-art ablation and deposition codes.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1056904
• Journal Information: Nuclear Fusion, Vol. 50, Issue 10; ISSN 0029--5515
• Country of Publication: United States
• Language: English