Density Peaking, Anomalous Pinch, and Collisionality in Tokamak Plasmas
Top Cited Papers
- 22 May 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 90 (20), 205003
- https://doi.org/10.1103/physrevlett.90.205003
Abstract
The existence of an anomalous particle pinch in magnetized tokamak plasmas is still questioned. Contradictory observations have been collected so far in tokamaks. Clear experimental evidence that density peaking in tokamak plasmas drops with increasing collisionality is provided for the first time. This phenomenon is explained by means of existing theoretical models based on the fluid description of drift wave instabilities, provided that such models include the dissipative effects introduced by collisions on the mentioned instabilities. These results reconcile the apparent contradictions found so far in the experiments.Keywords
This publication has 15 references indexed in Scilit:
- Particle Pinch with Fully Noninductive Lower Hybrid Current Drive in Tore SupraPhysical Review Letters, 2003
- Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX UpgradeNuclear Fusion, 2002
- Natural density formation as an H-mode operational limitNuclear Fusion, 2002
- Long timescale density peaking in JETPlasma Physics and Controlled Fusion, 2002
- Comparison of theory based transport models with ASDEX Upgrade dataNuclear Fusion, 2002
- Dependence of the density shape on the heat flux profile in ASDEX Upgrade high density H modesNuclear Fusion, 2001
- Evidence for the role of magnetic entropy and turbulent equipartition in stationary Ohmic tokamak dischargesEurophysics Letters, 2001
- Particle transport phenomena in the DIII-D tokamakNuclear Fusion, 2000
- Model for the Transition to the Radiatively Improved Mode in a TokamakPhysical Review Letters, 2000
- Pinch-Effect Oscillations in an Unstable Tokamak PlasmaPhysical Review Letters, 1970