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Crossed-beam energy transfer: polarization effects and evidence of saturation

D Turnbull, A Colaïtis, R K Follett, J P Palastro, D H Froula, P Michel, C Goyon, T Chapman, L Divol, G E Kemp2018年Plasma Physics and Controlled FusionIF 2.2出版社

Recent results on crossed-beam energy transfer are presented. Wavelength tuning was used to vary the amount of energy transfer between two beams in a quasi-stationary plasma with carefully controlled conditions. The amount of transfer agreed well with calculations assuming linear ion acoustic waves (IAWs) with amplitudes up to . Increasing the initial probe intensity to access larger IAW amplitudes for otherwise fixed conditions yields evidence of saturation. The ability to manipulate a beam's polarization, which results from the anisotropic nature of the interaction, is revisited; an example is provided to demonstrate how polarization effects in a multibeam situation can dramatically enhance the expected amount of energy transfer.

日本語訳

交差ビームエネルギー輸送に関する最近の結果を提示する。準定常プラズマ中で、二つのビーム間のエネルギー輸送量を変化させるために波長調整を用いた。輸送量は、振幅が〜までの線形イオン音波(IAW)を仮定した計算とよく一致した。それ以外の条件を固定したまま、プローブビームの初期強度を増大させてより大きなIAW振幅にアクセスすると、飽和の証拠が得られた。この相互作用の異方性に起因するビームの偏光操作の可能性を再検討し、多ビーム状況における偏光効果が期待されるエネルギー輸送量を劇的に増強し得ることを示す例を提示する。

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