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Experimental study of drift-wave saturation in quadrupole geometry

F J Crossley, P Uddholm, P Duncan, M Khalid, M G Rusbridge1992年Plasma Physics and Controlled FusionIF 2.2出版社

The authors describe measurements of nonlinear interactions between drift waves and low-frequency flute-like modes in the UMIST quadrupole. They present experimental measurements of the bispectrum, and also results from a technique of 'amplitude correlation' which they believe provides a more direct way of determining the direction of the energy flow. On the basis of the results they propose a model of energy flow in the drift-wave spectrum: the observed spectrum contains regions of growth at high frequency and damping at low frequency, with flow down the spectrum via a cascade mediated by the flute-like modes.

日本語訳

著者らは、UMIST四重極装置におけるドリフト波と低周波フルート状モードとの間の非線形相互作用の測定について述べている。彼らは、バイスペクトルの実験的測定結果とともに、エネルギー流の方向を決定するより直接的な方法であると彼らが考える「振幅相関」手法による結果を示している。これらの結果に基づき、彼らはドリフト波スペクトルにおけるエネルギー流のモデルを提案している:観測されたスペクトルは、高周波数領域での成長と低周波数領域での減衰を含み、フルート状モードによって媒介されるカスケードを介してスペクトルに沿ってエネルギーが流れる。

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