Runaway Electron Control in FTU
Abstract
Experimental results on the position and current control of disruption generated runaway electrons (RE) in FTU are presented. A scanning interferometer diagnostic has been used to analyze the time evolution of the RE beam radial position and its instabilities. Correspondence of the interferometer time traces, radial profile reconstructed via magnetic measurements and fission chamber signals are discussed. New RE control algorithms, which define in real-time updated plasma current and position references, have been tested in two experimental scenarios featuring disruption generated RE plateaus. Comparative studies among 52 discharges with disruption generated RE beam plateaus are presented in order to assess the effectiveness of the proposed control strategies as the RE beam interaction with the plasma facing components is reduced while the current is ramped-down.
Keywords
Cite
@article{arxiv.1508.05483,
title = {Runaway Electron Control in FTU},
author = {D. Carnevale and B. Esposito and M. Gospodarczyk and L. Boncagni and M. Sassano and S. Galeani and D. Marocco and L. Panaccione and O. Tudisco and W. Bin and C. Cianfarani and G. Ferrò and G. Granucci and A. Gabrielli and C. Maddaluno and J. R. Martìn-Solìs and Z. Popovic and F. Martinelli and G. Pucella and G. Ramogida and M. Riva and FTU Team},
journal= {arXiv preprint arXiv:1508.05483},
year = {2015}
}