- By:
- Heidbrink, W. W.; Park, Jin Myung ; Murakami, Masanori ; Petty, C C.; Holcomb, C; Van Zeeland, Michael
- Journal Name:
- Physical Review Letters
- Page Number:
- 175001
- Volume:
- 103
- Issue Number:
- 17
- Publication Date:
- July 6, 2011
- View DOI Listing:
- https://doi.org/10.1103/PhysRevLett.103.175001
Abstract
Cross-field diffusion of energetic ions by microturbulence is measured during neutral-beam injection into the DIII-D tokamak. Fast-ion D-alpha, neutron, and motional Stark effect measurements diagnose the fastion distribution function. As expected for transport by plasma turbulence, anomalies relative to the classical prediction are greatest in high temperature plasmas, at low fast-ion energy, and at larger minor radius. Theoretical estimates of fast-ion diffusion are comparable to experimental levels.
