Evidence for fast-Ion transport by microturbulence

W. W. Heidbrink; J. M. Park; M. Murakami; C. C. Petty; C. Holcomb; M. A. Van Zeeland

doi:10.1103/PhysRevLett.103.175001

Evidence for fast-Ion transport by microturbulence

W. W. Heidbrink, J. M. Park, M. Murakami, C. C. Petty, C. Holcomb, M. A. Van Zeeland

Fusion Theory and Modeling

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Abstract

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.

Original language	English
Article number	175001
Journal	Physical Review Letters
Volume	103
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.103.175001
State	Published - Oct 19 2009

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10.1103/PhysRevLett.103.175001

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abstract = "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.",

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AU - Holcomb, C.

AU - Van Zeeland, M. A.

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N2 - 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.

AB - 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.

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Evidence for fast-Ion transport by microturbulence

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