| Автор | K.G. McClements |
| Автор | R.O. Dendy |
| Автор | A. Gondhalekar |
| Дата выпуска | 1997-04-01 |
| dc.description | Neutral particle analyser (NPA) measurements of emitted hydrogen flux, integrated along a chord through the plasma centre, have been used to infer a perpendicular tail temperature T<sub>⊥</sub> of minority ion cyclotron range of frequencies (ICRF) heated protons in the Joint European Torus (JET). A relation is established between T<sub>⊥</sub> and the perpendicular proton temperature T<sub>⊥</sub>(0) at the position of maximum power deposition. At energies E >> T<sub>⊥</sub>(0), the value of T<sub>⊥</sub> inferred from the NPA is nearly equal to T<sub>⊥</sub>(0). In the opposite limit E << T<sub>⊥</sub>(0), it is shown that T<sub>⊥</sub> << T<sub>⊥</sub>(0). Applying this model to NPA measurements from a JET pulse with varying ICRF power P<sub>RF</sub>, it is found that the scaling of T<sub>⊥</sub>(0) with P<sub>RF</sub> in the 2 to 10 MW range is almost linear, as expected. Moreover, calculated values of the ICRF heated proton energy content, based on deduced values of T<sub>⊥</sub>(0), agree with diamagnetic measurements. The NPA measurements thus give access to a fundamental property of the heated proton energy distribution, which plays a crucial role in sawtooth stabilization |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Interpretation of measurements of ICRF heated minority proton distributions in JET |
| Тип | paper |
| DOI | 10.1088/0029-5515/37/4/I05 |
| Electronic ISSN | 1741-4326 |
| Print ISSN | 0029-5515 |
| Журнал | Nuclear Fusion |
| Том | 37 |
| Первая страница | 473 |
| Последняя страница | 480 |
| Аффилиация | K.G. McClements; UKAEA, Abingdon, UK |
| Аффилиация | R.O. Dendy; UKAEA, Abingdon, UK |
| Аффилиация | A. Gondhalekar; UKAEA, Abingdon, UK |
| Выпуск | 4 |
