A scheduling method and apparatus for use by a processor that controls storage devices of a data storage system is presented. The photosensors are interspersed with the pixel elements to measure light that is emitted by the pixel elements. An RF power supply, which supplies RF power, is connected to the first or second electrode through a matching circuit. The second long side is disposed opposite the first short side of the first radiating unit. A spacing between the inner conductor and the dielectric layer may be reduced proximate a mid section of the inner conductor. The target stabilization point is set to the electric stabilization point, at which the holding torque is provided by the stabilization pole teeth of the specified phase.