Recent results from divertor operation in ASDEX Upgrade
- 1 December 1994
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 36 (12B) , B79-B92
- https://doi.org/10.1088/0741-3335/36/12b/006
Abstract
The results of divertor studies on ASDEX Upgrade, at currents of up to 1.2 MA and heating powers up to 10 MW are described, with emphasis on the ELMy H-mode. The spatial and temporal characteristics of their heat load, and the simulation of ELMs by a time-dependent scrape-off layer code are described. High gas puff rates were found to lead to a large increase in divertor neutral pressure, at modest changes in ne, and to a strong reduction in time-averaged power flow and complete detachment from both target plates in between ELMs. Using pre-programmed puffs of neon and argon, the radiative power losses could be raised to 75% of the heating power, in H-regime discharges, and the regime of enhanced divertor neutral pressure was found also to lead to an improved pumping of recycling impurities.Keywords
This publication has 9 references indexed in Scilit:
- Experimental investigation of marfes and the density limit in the ASDEX upgradePlasma Physics and Controlled Fusion, 1994
- H-mode results in ASDEX UpgradePlasma Physics and Controlled Fusion, 1994
- Vertical displacement events and halo currentsPlasma Physics and Controlled Fusion, 1993
- Radiative edges under control by impurity fluxesPlasma Physics and Controlled Fusion, 1993
- Parameters of the ITER EDA designPlasma Physics and Controlled Fusion, 1993
- Edge physics and H-mode studies in ASDEX UpgradePlasma Physics and Controlled Fusion, 1993
- Can detached divertor plasmas be explained as self-sustained gas targets?Nuclear Fusion, 1993
- Progress in two-dimensional plasma edge modellingJournal of Nuclear Materials, 1992
- H-mode energy confinement scaling from the DIII-D and JET tokamaksNuclear Fusion, 1991