| Poloidal polarimeter system for current density measurements in ITER (2000) | |||||||||||
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| Poloidal polarimeter system for current density measurements ITER Donne FOM Instituut voor Plasmafysica Rijnhuizen Associatie EURATOM FOM Nieuwegein The Netherlands Edlington UKAEA Culham Laboratory Abingdon Oxon United Kingdom Joffrin CEA Cadarache Saint Paul lez Durance France Koslowski Forschungszentrum lich GmbH lich Germany Nieswand CRPP EPFL Lausanne Switzerland Segre INFM Universita Roma Rome and ENEA CRE Frascati Frascati Italy Stott JET Joint Undertaking Abingdon Oxon United Kingdom Walker ITER Joint Central Team Garching Germany Presented June The polarimeter system for ITER features viewing chords covering almost the full poloidal cross section the plasma fan like arrangement The laser beams all enter the plasma via diam penetrations through the diagnostic plug the low eld side Small retrore ectors the high eld side mirror the laser beams back towards the penetrations the low eld side Extensive feasibility calculations have led the conclusion that the optimum wavelength for the polarimeter around this wavelength counterproductive effects like refraction and electron cyclotron absorption are negligibly small However the anticipated Faraday rotation angles are still very large such that several important plasma parameters can measured within the requirements set the ITER team this article the status the conceptual design the polarimeter system for ITER will presented American Institute Physics INTRODUCTION The International Thermonuclear Experimental Reactor ITER tea | |||||||||||
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