@article{oai:repo.qst.go.jp:00081228,
 author = {Nocente, Massimo and O Kazakov, Yevgen and Garcia, Jeronimo and G Kiptily, Vasily and Ongena, Jozef and Dreval, Mykola and Fitzgerald, Michael and E Sharapov, Sergei and Stancar, Ziga and Weisen, Henri and Baranov, Yuriy and Bierwage, Andreas and Craciunescu, Teddy and Dal Molin, Andrea and de la Luna, Elena and Dumont, Remi and Dumortier, Pierre and Eriksson, Jacob and Giacomelli, Luca and Giroud, Carine and Goloborodko, Victor and Gorini, Giuseppe and Khilkevitch, Evgeniy and K Kirov, Krassimir and Iliasova, Margarita and Jacquet, Philippe and Lauber, Philipp and Lerche, E and Mantsinen, MJ and Mariani, Alberto and Mazzi, Samuele and Nabais, Fernando and Filomena Ferreira Nave, Maria and Oliver, J and Panontin, Enrico and Rigamonti, Davide and Sahlberg, Arne and Salewski, Mirko and Shevelev, A and Shinohara, Koji and Paula, Sirén and Sumida, Shuhei and Tardocchi, Marco and Van Eester, Dirk and Varje, Jari and Zohar, Andrej and Contributors, JET and Bierwage, Andreas and Koji, Shinohara and Shuhei, Sumida},
 issue = {12},
 journal = {Nuclear Fusion},
 month = {Oct},
 note = {Dedicated experiments to generate energetic D ions and D−3He fusion-born alpha particles were performed at the Joint European Torus (JET) with the ITER-like wall (ILW). Using the 3-ion D-(DNBI)-3He radio frequency (RF) heating scenario, deuterium ions from neutral beam injection (NBI) were accelerated in the core of mixed D−3He plasmas to higher energies with ion cyclotron resonance frequency (ICRF) waves, in turn leading to a core-localized source of alpha particles. The fast-ion distribution of RF-accelerated D-NBI ions was controlled by varying the ICRF and NBI power (P_{ICRF}≈4-6 MW, P_{NBI}≈3-20 MW), resulting in rather high D-D neutron (≈1×10^16/s) and D−3He alpha rates (≈2×10^16/s) at moderate input heating power. Theory and TRANSP analysis shows that large populations of co-passing MeV-range D ions were generated using the D−(DNBI)−3He 3-ion ICRF scenario. This important result is corroborated by several experimental observations, in particular gamma-ray measurements. The developed experimental scenario at JET provides unique conditions for probing several aspects of future burning plasmas, such as the contribution from MeV range ions to global confinement, but without introducing tritium. Dominant fast-ion core electron heating with T_i≈T_e and a rich variety of fast-ion driven Alfven eigenmodes (AEs) were observed in these D−3He plasmas. The observed AE activities do not have a detrimental effect on the thermal confinement and, in some cases, may be driven by the fusion born alpha particles. A strong continuous increase in neutron rate was observed during long-period sawteeth (>1 s), accompanied by the observation of reversed shear AEs, which implies that a non-monotonic q profile was systematically developed in these plasmas, sustained by the large fast-ion populations generated by the 3-ion ICRF scenario.},
 title = {Generation and observation of fast deuterium ions and fusion-born alpha particles in JET D-3He plasmas with the 3-ion radio-frequency heating scenario},
 volume = {60},
 year = {2020}
}