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1、THEECH&CDTRANSMISSIONLINEFORITERaF.GANDINI,b*T.S.BIGELOW,aB.BECKET,bJ.B.CAUGHMAN,aD.COX,aC.DARBOS,T.GASSMANN,aM.A.HENDERSON,aaO.JEAN,cK.KAJIWARA,cN.KOBAYASHI,C.NAZARE,dY.ODA,caT.OMORI,aD.PUROHIT,bD.A.RASMUSSEN,eD.M.S.RONDEN,fG.SAIBENE,K.SAKAMOTO,cM
2、.A.SHAPIRO,gcK.TAKAHASHI,andR.J.TEMKINgabcdefITEROrganization,CS90046-13067SaintPaulLezDuranceCedex,FranceU.S.ITERProjectOffice,ORNL,1055CommercePark,OakRidge,Tennessee37831JapanAtomicEnergyAgency,801-1Mukoyama,Naka-shi,Ibaraki311-0193,JapanAssystemFacilities,23Pl
3、acedeWicklowCS30713,78067SaintQuentinenYvelinesCedex,FranceAssociationEURATOM-FOM,3430BENieuwegein,TheNetherlandsFusionforEnergy,C0JosepPla2,TorresDiagonalLitoral-B3,E-08019Barcelona,SpaingMITPlasmaScienceandFusionCenter,Cambridge,Massachusetts02139ReceivedAugust25,20
4、10AcceptedforPublicationOctober4,2010Thetransmissionline(TL)subsystemassociatedwiththeITERelectroncyclotronheatingandcurrentdrivesystemhasreachedtheconceptualdesignmaturity.AtthisstagetheresponsibilityoffinalizingthedesignhasbeentransferredfromtheITEROrganizationtothe
5、U.S.DomesticAgency.ThepurposeoftheTListotransmitthemicrowavesgeneratedbythe170-GHzgyrotronsinstalledintheradio-frequencybuildingtothelauncherslocatedinoneequatorialandfouruppertokamakports.EachTLconsistsofevacuatedHE11waveguides,directcurrentbreaks,powermonitors,mitre
6、bends,polarizers,switches,loads,andpumpingsectionsandwillhaveatypicallengththatrangesfrom100to160m.Overalltransmissionefficiencycouldbeashighas92%dependingonthespecificpathbetweenagivengyrotronandlauncher.Allcomponentsarerequiredtobe2-MWcompatible,andtheirlayoutandor
7、ganizationhavebeenoptimizedforsimplifyingthemaintenanceaccessibilityandmonitoringtheprimarytritiumbarrierintegrity.TwodifferentTLlayoutsareatthemomentunderstudy,toaccommodatethetwoalternativeoptionsfortheEuropeansources:four2-MWunitsoreight1-MWunits.Inthispapertheactu
8、aldesignispresentedandthetechnicalrequirementsarediscussed.KEYWORDS:ITER,transmissionlines,electroncyclotronheatingandcurren
