In-port-plug transmission line design of the ITER plasma position reflectometer  

作　　者：J MARTÍNEZ-FERNÁNDEZ ÁCAPPA A SIMONETTO T ESTRADA E DE LA LUNA E J BLANCO 

机构地区：[1] Laboratorio Nacional de Fusión.CIEMAT,Avda Complutense 40.Madrid 28040,Spain [2] CNR-ISTP,via Cozzi 53,20125 Milano,Italy

出　　处：《Plasma Science and Technology》2020年第6期15-20,共6页等离子体科学和技术（英文版）

基　　金：partially funded by the Ministeriode Ciencia,Innovaciony Universidades of Spain under project FIS2017-88892-P;Fusion for Energy under Specific Grant Agreement F4E-FPA-375-SG05。

摘　　要：This work describes the microwave design of the transmission line housed in the in-port-plug region of the ITER plasma position reflectometer(PPR).The design of the components of the inport-plug reflectometers(located in equatorial port-plug 10(EPP10) and in upper-port-plug 01(UPP01)) is presented.Using a 3 D ray tracing code, the spatial position and optimum orientation angles of each set of emission and detection antennas were determined.A feasible path was then created from the obtained antenna positions and orientations to the primary vacuum window.Oversized tall waveguides were chosen to reduce ohmic losses.Due to space constraints in the ITER crowded environment, bends in oversized waveguides were unavoidable, and thus mode conversion was produced.To keep mode conversion losses at bay, hyperbolic secant curvature bends had to be used whenever possible.However, E-plane bends in tall waveguides proved to be especially critical, making it necessary to employ other approaches when higher bending angles were needed.Mode conversion results were obtained by evaluating the mode coupling equations.Ohmic losses have also been computed and their results compared with commercial simulators, obtaining a perfect agreement.

关 键 词：REFLECTOMETRY microwave technology ITER diagnostic 

分 类 号：TN820[电子电信—信息与通信工程] TN814