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(EX4/3) Recent Progress in RFP Research on the RFX Experiment

   
R. Bartiromo , A. Buffa ¹, V. Antoni ¹, L. Apolloni , M. Bagatin ¹, W. Baker , F. Bellina , P. Bettini , R. Bilato ¹, T. Bolzonella ¹, A. Canton , S. Cappello , L. Carraro , R. Cavazzana ¹, G. Chitarin , S. Costa , F. D'Angelo , A. De Lorenzi , G. De Pol , D. Desideri ¹, D. Escande , P. Fiorentin , P. Franz ¹, E. Gaio , L. Garzotti , L. Giudicotti ¹, F. Gnesotto , D. Gregoratto , S. C. Guo , P. Innocente , A. Intravaia ¹, A. Luchetta , G. Malesani , G. Manduchi , G. Marchiori , L. Marrelli , P. Martin ¹, E. Martines , S. Martini , A. Maschio , A. Masiello , F. Milani ¹, M. Moresco ¹, A. Murari ¹, S. Ortolani , R. Paccagnella , R. Pasqualotto ¹, S. Peruzzo , R. Piovan , N. Pomaro , R. Pugno ¹, M. E. Puiatti , G. Rostagni , F. Sattin ¹, P. Scarin , G. Serianni , P. Sonato , E. Spada , G. Spizzo , M. Spolaore ¹, C. Taliercio , G. Telesca , D. Terranova , V. Toigo , L. Tramontin , M. Valisa , M. Viterbo ¹, S. Vitturi , P. Zaccaria , P. Zanca ¹, E. Zilli ¹, G. Zollino 
 
Consorzio RFX - Corso Stati Uniti 4, 35127 Padova, Italy
¹ These authors are also members of INFM, Unità di Padova

Abstract
This paper presents an overview of recent experimental results obtained on the RFX  device. We succeeded in obtaining and study RFP plasma with a plasma current up to 1 MA with negligible radiation losses and low effective charge. The local power and particle balance shows that in standard operation the plasma core is dominated by magnetic turbulence and that the global confinement is mainly provided by the edge region where a strongly sheared radial electric field is present. With poloidal current drive the amplitude of magnetic fluctuation  and the thermal conductivity of the plasma core are reduced leading to improved confinement . Reduced heat transport is also observed when the width of the n spectrum of magnetic fluctuations is reduced.

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