Sheared Radial Electric-Field Effects on Turbulence Suppression due to Doubly Advanced Potential-Height Formation

Remarkable effects of radially produced shear of electric fields dEr⁄dr on both turbulent fluctuations and drift waves are experimentally demonstrated with improvement in plasma confinement for the first time in the tandem mirror GAMMA 10. These electric-shear effects are performed on the basis of a factor of two progress in ion-confining potential (φc) formation due to advanced electron-cyclotron-heating powers and vacuum conditions; the dependence of φc is consistent with our proposed physics scaling.