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Abstract

A fast scanning Langmuir probe system (LPS) for ASDEX-Upgrades divertor plasma investigations was designed, manufactured and operated . Profiles of ion saturation current density, Jsat' electron temperature, Ted' electron density, Ned floating potential, Vand Mach number have been recorded for ohmic (OH) and low/medium power neutral beam heated (NI) discharges. In these cases the probe can access both divertor legs, allowing comparison of plasma parameters in the two divertors and investigations of the private flux region. Strong divertor asymmetries, complex plasma flow patterns and changes in the power flow to the divertor targets, depending on ion gradB drift direction, density and divertor geometry, have been observed.

Additional information

Authors: TSOIS N, NCSR 'Demokritos', Athens (GR);KYRIAKAKIS G, NCSR 'Demokritos', Athens (GR);MARKOULAKI M, NCSR 'Demokritos', Athens (GR);THEODOROPOULOS P, NCSR 'Demokritos', Athens (GR);WEINLICH M, NCSR 'Demokritos', Athens (GR);DORN C, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);PFLUG M, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);SCHRAMM G, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);WEINLICH M, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE);THE ASDEX UPGRADE, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, 266-269 (1999), 1230-1233
Record Number: 199910778 / Last updated on: 1999-05-21
Category: PUBLICATION
Original language: en
Available languages: en