Phys. Rev. Lett. 103, 175001 (2009) [4 pages]Evidence for Fast-Ion Transport by MicroturbulenceReceived 3 April 2009; published 19 October 2009 Cross-field diffusion of energetic ions by microturbulence is measured during neutral-beam injection into the DIII-D tokamak. Fast-ion Dα, neutron, and motional Stark effect measurements diagnose the fast-ion 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.175001
DOI:
10.1103/PhysRevLett.103.175001
PACS:
52.35.Ra, 52.55.Fa, 52.55.Pi
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