Pelletinjectionexperimentshavebeenwidelycarriedoutwithvarioustoroidalplasmas,peakeddensityprofileandimprovedconfinementarefrequentlyobserved,andsomeinterestingphenomenahavealsobeenfound.Oneofthemisthelong-livedm=1/n=1oscillationobservedonsoftX-rayemissionandotherdiagnostics(notablythemicrowaveinterferometersandtheECEsystems)afterpelletinjectioninJET,JT-60,
