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Detection of alpha heating in JET-ILW DT plasmas by a study of the electron temperature response to ICRH modulation
- Source :
- Nuclear Fusion, Vol 64, Iss 8, p 086001 (2024)
- Publication Year :
- 2024
- Publisher :
- IOP Publishing, 2024.
-
Abstract
- In the JET DTE2 campaign a new method was successfully tested to detect the heating of bulk electrons by α-particles, using the dynamic response of the electron temperature T _e to the modulation of ion cyclotron resonance heating (ICRH). A fundamental deuterium (D) ICRH scheme was applied to a tritium-rich hybrid plasma with D-neutral beam injection (NBI). The modulation of the ion temperature T _i and of the ICRH accelerated deuterons leads to modulated α -heating with a large delay with respect to other modulated electron heating terms. A significant phase delay of ∼40° is measured between central T _e and T _i , which can only be explained by α -particle heating. Integrated modelling using different models for ICRH absorption and ICRH/NBI interaction reproduces the effect qualitatively. Best agreement with experiment is obtained with the European Transport Solver/Heating and Current Drive workflow.
Details
- Language :
- English
- ISSN :
- 17414326 and 00295515
- Volume :
- 64
- Issue :
- 8
- Database :
- Directory of Open Access Journals
- Journal :
- Nuclear Fusion
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.85219e47e73843088cbc6ec36e05bba3
- Document Type :
- article
- Full Text :
- https://doi.org/10.1088/1741-4326/ad52aa