- Sharapov, SE;
- Alper, B;
- Berk, HL;
- Borba, DN;
- Breizman, BN;
- Challis, CD;
- Classen, IGJ;
- Edlund, EM;
- Eriksson, J;
- Fasoli, A;
- Fredrickson, ED;
- Fu, GY;
- Garcia-Munoz, M;
- Gassner, T;
- Ghantous, K;
- Goloborodko, V;
- Gorelenkov, NN;
- Gryaznevich, MP;
- Hacquin, S;
- Heidbrink, WW;
- Hellesen, C;
- Kiptily, VG;
- Kramer, GJ;
- Lauber, P;
- Lilley, MK;
- Lisak, M;
- Nabais, F;
- Nazikian, R;
- Nyqvist, R;
- Osakabe, M;
- von Thun, C Perez;
- Pinches, SD;
- Podesta, M;
- Porkolab, M;
- Shinohara, K;
- Schoepf, K;
- Todo, Y;
- Toi, K;
- Van Zeeland, MA;
- Voitsekhovich, I;
- White, RB;
- Yavorskij, V
Remarkable progress has been made in diagnosing energetic particle instabilities on present-day machines and in establishing a theoretical framework for describing them. This overview describes the much improved diagnostics of Alfvén instabilities and modelling tools developed world-wide, and discusses progress in interpreting the observed phenomena. A multi-machine comparison is presented giving information on the performance of both diagnostics and modelling tools for different plasma conditions outlining expectations for ITER based on our present knowledge. © 2013 IAEA, Vienna.