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Review of data processing techniques for density profile evaluation from broadband FM-CW reflectometry on ASDEX Upgrade

P. Varela, M.E. Manso, A. Silva, the CFN Team, the ASDEX Upgrade Team2006年被引用 37Nuclear FusionIF 3出版社

Broadband FM-CW reflectometry is foreseen to be used on ITER to measure the electron density profile, both in the main and divertor plasmas. These measurements should provide crucial information for machine control and operation, in complement to magnetic diagnostics, and require the automatic evaluation of the density profile in all relevant plasma scenarios. This is a complex task due to the effects of plasma turbulence on the probing microwaves. A major and continued effort both on hardware development and data processing has been made in the ASDEX Upgrade broadband reflectometry diagnostic since 1991, which has led to noticeable improvements of density profile measurements. Here we review the evolution of the data processing techniques for profile evaluation. We first describe the standard methods that have been applied in ASDEX Upgrade (as well as in other machines) and discuss their advantages and limitations. Secondly, the novel techniques implemented in ASDEX Upgrade are presented and the resulting improvements on profile evaluation are discussed. It is shown that these are due to the ability to use both the a priori knowledge about profile measurements and the advanced features of the ASDEX Upgrade reflectometry diagnostic.

日本語訳

広帯域FM-CW反射測定は、メインプラズマとダイバータプラズマの両方において電子密度分布を測定するために、ITERでの使用が予定されている。これらの測定は、磁気計測を補完するものとして、装置制御と運転に重要な情報を提供すると期待されており、関連するすべてのプラズマシナリオにおける密度分布の自動評価が必要とされている。これは、プラズマ乱流がプロービングマイクロ波に及ぼす影響のため、複雑な課題である。ASDEX Upgrade広帯域反射測定診断では、1991年以来、ハードウェア開発とデータ処理の両方において大規模かつ継続的な努力が払われてきており、その結果、密度分布測定の顕著な改善がもたらされた。本稿では、分布評価のためのデータ処理技術の進化を概説する。まず、ASDEX Upgrade(および他の装置)で適用されてきた標準的な手法について説明し、その利点と限界を議論する。次に、ASDEX Upgradeで実装された新しい手法を紹介し、分布評価における改善結果について議論する。これらの改善は、分布測定に関する事前知識と、ASDEX Upgrade反射測定診断の高度な機能の両方を活用できることによるものであることを示す。

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asdex-upgrade高精度(タイトル一致)iter低精度(概要文一致)

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ASDEXASDEX UpgradeDensity profilesReflectometry
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