Drift wave test particle transport in reversed shear profile
- Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies
- Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Physics
Drift wave maps, area preserving maps that describe the motion of charged particles in drift waves, are derived. The maps allow the integration of particle orbits on the long time scale needed to describe transport. Calculations using the drift wave maps show that dramatic improvement in the particle confinement, in the presence of a given level and spectrum E x B turbulence, can occur for q(r)-profiles with reversed shear. A similar reduction in the transport, i.e., one that is independent of the turbulence, is observed in the presence of an equilibrium radial electric field with shear. The transport reduction, caused by the combined effects of radial electric field shear and both monotonic and reversed shear magnetic q-profiles, is also investigated.
- Research Organization:
- Univ. of Texas, Inst. for Fusion Studies, TX (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- FG03-96ER54346
- OSTI ID:
- 674816
- Report Number(s):
- DOE/ER/54346-826; ON: DE99000298; TRN: 99:000931
- Resource Relation:
- Other Information: PBD: Jun 1998
- Country of Publication:
- United States
- Language:
- English
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