Peaked density profiles due to neon injection on FTU

C. Mazzotta, A. Bañón Navarro, L. Gabellieri, M. Marinucci, G. Pucella, D. Told, O. Tudisco, G. Apruzzese, G. Artaserse, C. Sozzi

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Abstract

Neon injection in FTU can cause a spontaneous increase of the line-average density by a factor 2. The recent experiments were devoted to characterize the plasma response to the neon injection at different densities and plasma currents. A qualitative estimate from UV spectroscopy measurements indicates that the density behaviour cannot be attributed simply to the stripped electrons from the puffed impurity, but a modification of particle transport should be invoked in order to explain the spontaneous rise and the higher peaking. JETTO transport and GENE gyrokinetic codes analyses, as well as a calculation of the electron diffusion coefficients D and pinch velocity U, contribute to feature the peaking effect.
Original languageEnglish
Article number073027
Pages (from-to)-
JournalNuclear Fusion
Volume55
Issue number7
DOIs
Publication statusPublished - 1 Jul 2015
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Mazzotta, C., Bañón Navarro, A., Gabellieri, L., Marinucci, M., Pucella, G., Told, D., ... Sozzi, C. (2015). Peaked density profiles due to neon injection on FTU. Nuclear Fusion, 55(7), -. [073027]. https://doi.org/10.1088/0029-5515/55/7/073027