title: Parallel RF force driven by the inhomogeneity of power absorption in magnetized plasma.
abstract: A nonlinear parallel force can be exerted through the inhomogeneity of rf resonant absorption in a magnetized plasma. While providing no integrated force over a plasma volume, this force can redistribute momentum parallel to the magnetic field. Because flows and currents parallel to the magnetic field encounter different resistances, this redistribution can play a large role, in addition to the role played by the direct absorption of parallel momentum. For nearly perpendicular propagating waves in a tokamak plasma, this additional force is expected to affect significantly the toroidal rf-driven current and the toroidal flow drive.
authors.affiliation: Department of Engineering Physics, Tsinghua University, Beijing 100084, China and Institute of Plasma Physics and Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Gao
authors.affiliation: Institute of Plasma Physics and Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei 230031, China.
authors.forename: Jiale
authors.initials: J
authors.lastname: Chen
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA.
authors.forename: Nathaniel J
authors.initials: NJ
authors.lastname: Fisch