Reconstruction of hollow areas in density profiles from frequency swept reflectometry

作     者：Rennan B MORALES Stéphane HEURAUX Roland SABOT Sébastien HACQUIN Frédéric CLAIRET the Tore Supra Team Rennan B MORALES;Stéphane HEURAUX;Roland SABOT;Sébastien HACQUIN;Frédéric CLAIRET;Tore Supra Team

作者机构：United Kingdom Atomic Energy AuthorityCulham Centre for Fusion EnergyCulham Science CentreAbingdonOxonOX143DBUnited Kingdom IJLUMR CNRSUniversity of LorraineBP50840NancyF-54011France Institute of PhysicsUniversity of Sao PauloSao Paulo 05315-970Brazil IRFMCEACadaracheF-13108 Saint-Paul-lez-DuranceFrance EUROfusion Programme Management UnitCulham Science CentreCulham OX143DBUnited Kingdom 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2020年第22卷第6期

页      面：32-40页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：carried out with the support of the Brazilian National Council for Scientific and Technological Development(CNPq)under the Science Without Borders programme,within the framework of the French Federation for Magnetic Fusion Studies(FR-FCM)and of the EUROfusion consortium with funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No.633053 part-funded by the RCUK Energy Programme grant number EP/P012450/1 

主　　题：FM-CW reflectometry profile reconstruction reflectometry density profile hollow profile blind area 

摘      要：The standard density profile reconstruction techniques are based on the WKB approximation of the probing wave’s phase,making them unable to properly reconstruct blind areas in the cut-off frequency *** reconstruction suffers a significant immediate error that is not rapidly *** is demonstrated that even though no reflections occur inside the hollow region causing the blind area,the higher probing frequencies that propagate through it carry information that can be used to estimate its *** usually ignored full-wave effects were investigated with the use of full-wave simulations in 1 D,with special attention paid to the frequency band where they are dominant.A database of perturbation signals was simulated onfive-dimensions of parameters and an application of the database inversion was demonstrated for a magnetic island in a Tore Supra *** new adapted reconstruction scheme improved the description of the density profile inside the hollow region and also along 10 cm after it.