First Results of Pellet Injection Experiments on EAST-中国期刊网

摘要 AnewpelletinjectionsystemwasinstalledontheEASTtokamakandpreliminaryexperimentswereperformedduringthe2012runcampaign.TypicalphenomenaassociatedwithdeuteriumpelletinjectionintoaplasmadischargehavebeenobservedincludingsuddenincreasesoftheelectrondensityandHα/Dαemissionintensityaswellasasignificantdecreaseinplasmaelectrontemperature.ProfileshavebeenstudiedinordertounderstandtheinfluenceofpelletfuellingonEASTdischarges.Eventhoughtheinjectorwasspecificallydesignedforplasmafuelling,ELMtriggeringusingthepelletinjectionhasalsobeentested.InordertofindappropriateparametersfortriggeringELMsinH-modeplasmas,scanningofthepelletinjectionspeedwasemployedforpelletsinjectedfromboththehighfieldsideandlowfieldsideoftheplasmacolumn.Ithasbeenobservedthatlow-speedpelletsinjectedintoH-modeplasmafromthelow-fieldsidecouldtriggeranELMfollowedbyanumberofsmallerinducedELMsatabout300Hz.

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First Results of Pellet Injection Experiments on EAST

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First Results of Pellet Injection Experiments on EAST

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