Overview of quasi-single helicity experiments in reversed field pinches

Overview of quasi-single helicity experiments in reversed field pinches, P. Martin, L. Marrelli, G. Spizzo, P. Franz, P. Piovesan, I. Predebon, T. Bolzonella, S. Cappello, A. Cravotta, D.F. Escande, L. Frassinetti, S. Ortolani, R. Paccagnella, D. Terranova, the RFX team, B.E. Chapman, D. Craig, S.C. Prager, J.S. Sarff, the MST team, P. Brunsell, J.-A. Malmberg, J. Drake, the EXTRAP T2R team, Y. Yagi, H. Koguchi, Y. Hirano, the TPE-RX team, R.B. White, C. Sovinec, C. Xiao, R.A. Nebel, D.D. Schnack