Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Here, a low-confinement mode discharge which optimizes the capability of the new main-ion chargeexchange-recombination spectroscopy system on DIII-D to measure deuterium toroidal velocity is interpretted in comparison with the predictions of neoclassical theory, with an emphasis on the plasma edge region. The observed peaking in the deuterium toroidal velocity near the separatrix is shown to be consistent with intrinsic co-rotation due to ion orbit loss. In general, the standard neoclassical toroidal and poloidal momentum transport rates are found to be smaller than those inferred from experiment, but a comparison has not yet been made with the more recent extended neoclassical theory that calculates the effects of poloidal asymmetries using an elongated flux surface representation.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FC02-04ER54698
- OSTI ID:
- 1376201
- Journal Information:
- Nuclear Fusion, Vol. 54, Issue 7; ISSN 0029-5515
- Publisher:
- IOP ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Improvements to an ion orbit loss calculation in the tokamak edge
|
journal | December 2016 |
The dependence of ion orbit loss on ion charge and mass
|
journal | December 2018 |
A Particle-, Momentum-, and Energy-Conserving Fluid Transport Theory for the Tokamak Plasma Edge
|
journal | May 2019 |
Change in ion orbit loss, intrinsic rotation and particle pinch across the L–H transition in DIII-D plasmas
|
journal | March 2019 |
Extended fluid transport theory in the tokamak plasma edge
|
journal | May 2017 |
Similar Records
Comparison of measured impurity poloidal rotation in DIII-D with neoclassical predictions under low toroidal field conditions
Charge exchange recombination spectroscopy measurements of DIII-D poloidal rotation with poloidal asymmetry in angular rotation