Published August 31, 2020
| Version v1
Publication
Dynamics and stability of divertor detachment in H-mode plasmas on JET
Description
The dynamics and stability of divertor detachment in N2 seeded, type-I, ELMy H-mode plasmas
with dominant NBI heating in the JET ITER-like wall device is studied by means of an
integrated analysis of diagnostic data from several systems, classifying data relative to the ELM
times. It is thereby possible to study the response of the detachment evolution to the control
parameters (SOL input power, upstream density and impurity fraction) prevailing during the
inter-ELM periods and the effect of ELMs on the detached divertor. A relatively comprehensive
overview is achieved, including the interaction with the targets at various stages of the ELM
cycle, the role of ELMs in affecting the detachment process and the overall performance of the
scenario. The results are consistent with previous studies in devices with an ITER-like, metal
wall, with the important advance of distinguishing data from intra- and inter-ELM periods.
Operation without significant degradation of the core confinement can be sustained in the
presence of strong radiation from the x-point region (MARFE).
Abstract
EURATOM 633053Abstract
RCUK Energy Programme P012450/1Additional details
Identifiers
- URL
- https://idus.us.es/handle//11441/100579
- URN
- urn:oai:idus.us.es:11441/100579