Year: 1999
Type: article
Abstract: The scaling of the energy confinement in H mode plasmas with different hydrogenic isotopes (hydrogen, deuterium, DT and tritium) is investigated in JET.For ELM-free H modes the thermal energy confinement time τ th is found to decrease weakly with the isotope mass (τ th ∼ M -0.25±0.22 ), whilst in ELMy H modes the energy confinement time shows practically no mass dependence (τ th ∼ M 0.03±0.1 ).Detailed local transport analysis of the ELMy H mode plasmas reveals that the confinement in the edge region increases strongly with the isotope mass, whereas the confinement in the core region decreases with mass (τ thcore ∝ M -0.16 ), in approximate agreement with theoretical models of the gyro-Bohm type (τgB ∼ M -0.2 ).
Source: Nuclear Fusion
Authors: J.G Cordey, B Balet, D.V Bartlett, R.V Budny, J.P Christiansen, G.D Conway, L.-G Eriksson, G.M Fishpool, C.W Gowers, J.C.M. de Haas, P.J Harbour, L.D Horton, A.C Howman, J Jacquinot, W Kerner, C.G Lowry, R.D Monk, P Nielsen, E Righi, F.G Rimini, G Saibene, R Sartori, B Schunke, A.C.C Sips, R.J Smith, M.F Stamp, D.F.H Start, K Thomsen, B.J.D Tubbing, M.G. von Hellermann
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2114968528