Light impurity transport in JET ILW L-mode plasmas

Journal Article · Thu Jan 18 00:00:00 EST 2018 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aaa4d3· OSTI ID:1523633

Bonanomi, N.  ^[1]; Mantica, P. ^[2]; Giroud, C. ^[3]; Angioni, C. ^[4]; Manas, P. ^[4]; Menmuir, S. ^[3]

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1. Univ. of Milano-Bicocca, Milano (Italy); CNR-Inst. of Plasma Physics, Milano (Italy)
2. CNR-Inst. of Plasma Physics, Milano (Italy)
3. Culham Centre for Fusion Energy, Abingdon (United Kingdom)
4. Max Planck Inst. for Plasma Physics, Garching (Germany)

A series of experimental observations of light impurity profiles was carried out in JET (Joint European Torus) ITER-like wall (ILW) L-mode plasmas in order to investigate their transport mechanisms. These discharges feature the presence of 3He, Be, C, N, Ne, whose profiles measured by active Charge Exchange diagnostics are compared with quasi-linear and non-linear gyro-kinetic simulations. The peaking of 3He density follows the electron density peaking, Be and Ne are also peaked, while the density profiles of C and N are flat in the mid plasma region. Gyro-kinetic simulations predict peaked density profiles for all the light impurities studied and at all the radial positions considered, and fail predicting the flat or hollow profiles observed for C and N at mid radius in our cases.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE Office of Science (SC)
• Contributing Organization: JET Contributors
• DOE Contract Number: AC02–05CH11231
• OSTI ID: 1523633
• Journal Information: Nuclear Fusion, Vol. 58, Issue 3; ISSN 0029-5515
• Country of Publication: United States
• Language: English