TY - JOUR
T1 - Observation of Transition from Resonant to Nonresonant Lower-Hybrid Parametric Decay Process
AU - Fujiyama, Hiroshi
AU - Okano, Daisuke
AU - Itaya, Shigeru
AU - Akazaki, Masanori
AU - Watanabe, Yukio
PY - 1981
Y1 - 1981
N2 - Transition from a resonant to a nonresonant parametric decay process was observed by increasing pumping power for the frequency range ωLH≲ω0≲3ωLH (ω0: pump frequency, ωLH: lower-hybrid frequency). A resonant backward ion cyclotron wave was excited for 1.5≲ω0/ωLH≲3 and 1≲U/Cs≲5 (U: electron drift velocity, Cs: ion acoustic velocity). On the other hand, a nonresonant ion-quasimode was excited for 1≲ω0/ωLH≲2 and U/Cs≳2.5. These exciting regions can be also verified by measuring the radial distribution of the amplitudes of these decay waves.
AB - Transition from a resonant to a nonresonant parametric decay process was observed by increasing pumping power for the frequency range ωLH≲ω0≲3ωLH (ω0: pump frequency, ωLH: lower-hybrid frequency). A resonant backward ion cyclotron wave was excited for 1.5≲ω0/ωLH≲3 and 1≲U/Cs≲5 (U: electron drift velocity, Cs: ion acoustic velocity). On the other hand, a nonresonant ion-quasimode was excited for 1≲ω0/ωLH≲2 and U/Cs≳2.5. These exciting regions can be also verified by measuring the radial distribution of the amplitudes of these decay waves.
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U2 - 10.1143/JPSJ.50.2147
DO - 10.1143/JPSJ.50.2147
M3 - Article
AN - SCOPUS:77952773119
SN - 0031-9015
VL - 50
SP - 2147
EP - 2148
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 7
ER -