Control of radiation patterns of ion acoustic waves


  • T. Ohnuma,

  • Y. Tamura,

  • T. Fujita,

  • S. Adachi


The radiation field patterns of an ion acoustic wave from a circular disk-shaped antenna is controlled by applying a bias voltage to another mesh. The change of the radiation patterns is explained as a result of the in-phase reflection of an ion acoustic wave at an electron-rich sheath.