Parametric Excitation of Coupled Waves I. General Formulation
نویسندگان
چکیده
منابع مشابه
Parametric sound fields by phasecancellation excitation of primary waves
By radiating bifrequency primary waves from two ultrasonic emitters with changing the phases of the primary waves, we can obtain the sound fields that are different from the usual inphase excitation. Especially, for the excitation of out-phase by 180 degrees the difference frequency wave has the directivity of almost uniformity near the acoustic axis. Additionally, the sound pressure levels of ...
متن کاملParametric Excitation of Edge Waves in the Quantum Hall Effect.
We consider the process of parametric excitation of gapless edge modes in a Hall bar by an alternating current. We find that such a process can be realized provided both an inter-edge interaction and a constant current are present in the bar. The expected experimental signatures of this phenomenon are discussed. PACS numbers: 73.40.Hm, 72.15.Nj Typeset using REVTEX 1 Parametric excitation of wa...
متن کاملParametric excitation of Alfven waves by gravitational radiation
We consider the parametric excitation of Alfven waves by gravitational radiation propagating on a Minkowski background, parallel to an external magnetic field. As a starting point, standard ideal magnetohydrodynamics equations incorporating the curvature of space-time has been derived. The growth rate of the Alfven waves has been calculated, using the normal-mode approach. Various astrophysical...
متن کاملParametric Excitation of Alfv6n Waves in the Ionosphere
A novel method for the excitation of ELF waves in the ionosphere is presented. It utilizes the nonlinear mixing of two groundor satellite-produced radio frequency waves with a compressional Alfv6n wave. Parametric amplification thresholds are estimated to be between 10 and 20 MW peak power for 5-MHz pumps producing waves in the ELF range. Potential applications to ELF communications are discussed.
متن کاملParametric excitation of plasma waves by gravitational radiation
We consider the parametric excitation of a Langmuir wave and an electromagnetic wave by gravitational radiation, in a thin plasma on a Minkowski background. We calculate the coupling coe cients starting from a kinetic description, and the growth rate of the instability is found. The Manley Rowe relations are ful lled only in the limit of a cold plasma. As a consequence, it is generally di cult ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Physical Society of Japan
سال: 1968
ISSN: 0031-9015,1347-4073
DOI: 10.1143/jpsj.24.916