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Edge transport and fuelling studies via gas puff modulation in ASDEX Upgrade L-mode plasmas
- AbstractGas puff modulation experiments are performed at ASDEX Upgrade in L-mode plasmas. We model the discharge with the ASTRA transport code in order to determine transport coefficients outside of a normalized radius of ρ pol = 0.95. The experimental data is consistent with a range of particle diffusivities and pinch velocities of the order of D = (0.20 ± 0.13) m2 s−1 and v = (−1 ± 2) m s−1, respectively. The electron temperature response caused by the gas modulation permits to estimate also that heat diffusivity χ e increases almost linearly when collisionality rises due to fuelling. The fuelling particle flux is amplified by recycling, overcompensating losses.
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| Author: | C.U. Schuster, E. Wolfrum, E. Fable, R. Fischer, M. Griener, B. Tal, C. Angioni, T. Eich, P. Manz, U. Stroth, the ASDEX Upgrade Team |
|---|---|
| URN: | urn:nbn:de:gbv:9-opus-61703 |
| DOI: | https://doi.org/10.1088/1741-4326/ac6072 |
| ISSN: | 0029-5515 |
| ISSN: | 1741-4326 |
| Parent Title (English): | Nuclear Fusion |
| Publisher: | IOP Publishing |
| Place of publication: | Bristol |
| Document Type: | Article |
| Language: | English |
| Date of first Publication: | 2022/04/14 |
| Release Date: | 2022/11/28 |
| Tag: | neutral recycling; particle transport; pinch; plasma; tokamak; transport coefficients; turbulence |
| GND Keyword: | - |
| Volume: | 62 |
| Article Number: | 066035 |
| Page Number: | 11 |
| Faculties: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
| Licence (German): |  Creative Commons - Namensnennung |