ICRH system for the Ignitor machine

15th IEEE/NPSS Symposium. Fusion Engineering Pub Date : 1993-10-11 DOI:10.1109/FUSION.1993.518506

F. Carpignano, B. Coppi, M. Nassi

{"title":"ICRH system for the Ignitor machine","authors":"F. Carpignano, B. Coppi, M. Nassi","doi":"10.1109/FUSION.1993.518506","DOIUrl":null,"url":null,"abstract":"The ICRH system adopted for the Ignitor machine is characterized by a maximum power delivered to the plasma of 18 MW and a wide range of operating frequencies (100</spl nu/<210 MHz). The main functions of the system are to control the time evolution of the plasma temperature and the toroidal current density profiles, to keep the region where g<1 small and to suppress the possible onset of sawtooth oscillations by fast particle stabilization in relatively low plasma density discharges. The ICRH system can also be used to accelerate the attainment of ignition, to extend the conditions under which ignition is possible, to explore the conditions under which the second stability region of finite /spl beta/ plasmas can be achieved, to produce significant levels of power from D-/sup 3/He fusion reactions, to reduce the Volt-sec requirement and to perform current drive experiments in low density discharges (n/sub e/<2/spl times/10/sup 20/ m/sup -3/). The wide range of frequencies has been adopted in order to operate in different regimes (/spl omega/=/spl omega//sub CD/, /spl omega/(C/sup 3/)/sub He/, 2/spl omega//sub CT/, /spl omega//sub CH/ at maximum toroidal magnetic field). This additional source of heating allows Ignitor to produce a significant level of /spl alpha/ power in low plasma current and low toroidal magnetic field discharges, while operating at lower mechanical and thermal stresses and sustaining the discharges for a longer period of time. The ICRH system is composed of 6 antennae, completely inserted in first wall recesses, that are driven by amplifiers through the equatorial ports of the machine. Each antenna module composed of straps grouped in poloidal pairs, is able to couple up to 3 MW of heating power to the plasma.","PeriodicalId":365814,"journal":{"name":"15th IEEE/NPSS Symposium. Fusion Engineering","volume":"208 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1993-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"15th IEEE/NPSS Symposium. Fusion Engineering","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FUSION.1993.518506","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

The ICRH system adopted for the Ignitor machine is characterized by a maximum power delivered to the plasma of 18 MW and a wide range of operating frequencies (100

查看原文