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Experimental and simulated VUV spectra from the JET tokamak and thereversed field pinch RFX

M Mattioli, K B Fournier, M E Puiatti, M Valisa, L Carraro, I Coffey, M OMullane, F Sattin, P Scarin2002年Plasma Physics and Controlled FusionIF 2.2出版社

Experimental VUV spectra from the JET tokamak and from the reversed field pinch RFX have been simulated. For the former device both n = 2 to n = 2 L-shell Ar and Ne spectra (respectively, in the 14.5-43.0 and in the 35.0-80.0 nm ranges) were considered, whereas for RFX only the Ne spectrum was available. The spectra have been observed with the SPRED spectrometer. From the simulation of the spectra, relative sensitivity curves have been obtained for each instrument in the ranges of the simulation. For RFX only, it has been possible to extend this curve from ~13.0 to ~105 nm, by simulating intrinsic C and O emissions. The photon emission coefficients of the lines with wavelengths in the ranges of the experimental spectra were obtained from collisional-radiative models. For Ar and Ne these coefficients have been calculated by the Hebrew University Lawrence Livermore Atomic Codes atomic physics codes, whereas for C and O the corresponding coefficients have been taken from the `Atomic Data and Analysis Structure' database. Impurity modelling is performed using a one-dimensional impurity transport code, calculating for each atomic species the radial distribution of the impurity ions. The line brightnesses are evaluated in a post-processing subroutine and the simulations of the spectra are obtained. The spectral simulations (including impurity ion transport) give confidence in the atomic physics calculations, and allow the determination of the transport coefficients in the plasma regions from which the considered ionization states emit. Finally, the obtained relative sensitivity curves of the two SPRED spectrometers have been compared with the calibrations performed by means of the branching ratio technique.

日本語訳

JETトカマクおよび逆転磁場ピンチRFXからの実験的VUVスペクトルをシミュレーションした。前者の装置については、n=2からn=2へのL殻ArおよびNeスペクトル(それぞれ14.5〜43.0nmおよび35.0〜80.0nmの範囲)を考慮したのに対し、RFXについてはNeスペクトルのみが利用可能であった。スペクトルはSPRED分光器で観測された。各装置のシミュレーションから、シミュレーション範囲における各機器の相対感度曲線が得られた。RFXについては、固有のCおよびO発光をシミュレーションすることにより、この曲線を約13.0〜105nmまで拡張することが可能であった。実験スペクトルの範囲内の波長を持つ線の光子放出係数は、衝突放射モデルから得られた。ArおよびNeについては、これらの係数はヘブライ大学ローレンスリバモア原子コードによって計算されたのに対し、CおよびOについては、対応する係数は原子データ解析構造データベースから取得された。不純物モデリングは一次元不純物輸送コードを用いて実施され、各原子種について不純物イオンの動径分布が計算された。線輝度は後処理サブルーチンで評価され、スペクトルのシミュレーションが得られた。スペクトルシミュレーション(不純物イオン輸送を含む)は原子物理計算に確信を与え、対象とするイオン化状態が放射するプラズマ領域における輸送係数の決定を可能にした。最後に、2つのSPRED分光器の相対感度曲線は、分岐比法による較正結果と比較された。

装置

jet高精度(タイトル一致)

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JETReversed field pinchRFX
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