caa a22 4500 386368066 CHVBK 20180307111943.0 cr unu---uuuuu 161130e198904 xx s 000 0 eng 10.1017/S0022377800013933 doi S0022377800013933 pii (NATIONALLICENCE)cambridge-10.1017/S0022377800013933 Stochastic acceleration and heating of ions by a non-sinusoidal magnetosonic wave [Elektronische Daten] The stochastic non-resonant energization of ions in non-sinusoidal coherent plane-polarized magnetosonic waves is investigated. It is found that, as in the case of sinusoidal magnetosonic waves, the process does not follow quasi-linear theory, i.e. it is a diffusion in velocity space, but with a diffusion coefficient D ν-α, α ≈ 1, instead of D ν-3. Moreover, it is found that the presence of strong harmonics lowers the stochasticity threshold of the wave amplitude by as much as one order of magnitude (depending on the form of the power spectrum), but at the same time it suppresses the diffusion rate of the ions in velocity space. Our results indicate that waves with a saw-tooth wave form are the most efficient for ion energization. Copyright © Cambridge University Press 1989 Varvoglis H. Physics Department, University of Thessaloniki, GR-54006 Thessaloniki, Greece Basios V. Physics Department, University of Thessaloniki, GR-54006 Thessaloniki, Greece Journal of Plasma Physics Cambridge University Press 41/2(1989-04), 381-393 0022-3778 41:2<381 1989 41 PLA https://doi.org/10.1017/S0022377800013933 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022377800013933 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Varvoglis H. Physics Department, University of Thessaloniki, GR-54006 Thessaloniki, Greece NATIONALLICENCE 700 1- Basios V. Physics Department, University of Thessaloniki, GR-54006 Thessaloniki, Greece NATIONALLICENCE 773 0- Journal of Plasma Physics Cambridge University Press 41/2(1989-04), 381-393 0022-3778 41:2<381 1989 41 PLA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge