FIRST EXPERIMENTAL RESULTS OF TUNGSTEN TRANSPORT INVESTIGATIONS IN THE T-10 TOKAMAK PLASMA
| Autor: | A. Yu. Dnestrovskij, A. R. Nemets, I.A. Zemtsov, M. R. Nurgaliev, D.V. Sarychev, N. A. Mustafin, S.A. Grashin, D.S. Sergeev, D.V. Ryzhakov, L. A. Klyuchnikov, V. A. Krupin, Valery S. Lisitsa |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Electron density Tokamak Materials science Drop (liquid) chemistry.chemical_element Plasma Tungsten equipment and supplies Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas law.invention Nuclear Energy and Engineering chemistry law Impurity 0103 physical sciences Atomic physics 010306 general physics |
| Zdroj: | Problems of Atomic Science and Technology, Ser. Thermonuclear Fusion. 40:36-41 |
| ISSN: | 0202-3822 |
| DOI: | 10.21517/0202-3822-2017-40-2-36-41 |
| Popis: | The investigations of tungsten transport in T-10 plasma are presented in the current paper. The process of tungsten accumulation in OH discharges and its dependence on parameters ne, Ip, and Zeff are discussed. Peaked tungsten density profiles nW(r) are observed in plasmas with Zeff ≈ 1–1.5. In plasmas with Zeff ≈ 3–4, W accumulation is mainly integral with no profile peaking with regard to electron density ne(r). Lower densities of W are observed in discharges with a lithized T-10 vacuum vessel in comparison with plasma contaminated with light impurities. The disposal of W accumulation is produced by auxiliary ECRH input. During the central ECRH, the tungsten density profile flattens with the central density drop off by ~10 times together with W source increase up to 4 times. |
| Databáze: | OpenAIRE |
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