@article{0741-3335-55-12-124021,
	title = {Three-dimensional measurements of non-diffusive fast ion transport in {TORPEX}},
	volume = {55},
	issn = {0741-3335},
	url = {http://stacks.iop.org/0741-3335/55/i=12/a=124021},
	doi = {10.1088/0741-3335/55/12/124021},
	abstract = {In the basic plasma physics device TORPEX, progress in the fundamental understanding of supra-thermal ion transport is achieved by extensive sets of three-dimensional (3D) data, together with numerical simulations of supra-thermal ion tracers in fluid turbulent fields. A miniaturized lithium 6+ ion source injects fast ions with energies up to 1 KeV and a double-gridded energy analyzer is used as a detector. The source is mounted on a toroidally movable system and the detector can be moved in the poloidal cross-section, allowing one to reconstruct 3D fast ion current profiles. Synchronous detection is used to enhance the signal-to-noise ratio. A modulated biasing voltage is applied to the fast ion source and an analog lock-in amplifier is used to demodulate the detector signal. The analog lock-in amplifier is specially designed to remove the capacitive noise associated with the voltage modulation. Radial transport of the fast ions, associated with plasma turbulence, is characterized. A synthetic diagnostic allows comparing the experimental results with numerical simulations of the fast ion transport in a global fluid simulation of the TORPEX plasma. A good agreement is shown.},
	number = {12},
	urldate = {2013-11-29},
	journal = {Plasma Physics and Controlled Fusion},
	author = {Bovet, A and Furno, I and Fasoli, A and Gustafson, K and Ricci, P},
	month = dec,
	year = {2013},
	keywords = {diffusion, plasma physics},
	pages = {124021},
}

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