Abstract: Provided are an aircraft lightning probable area detection device, an aircraft lightning probable area transmission system, an aircraft lightning probable area detection method, and an aircraft lightning probable area detection program that suppress the data capacity and create an aircraft lightning probable area that enables intuitive understanding of aircraft lightning probable. An aircraft lightning probable area detection device includes: an information acquisition unit configured to acquire aircraft lightning probable information indicating a level of an expected lightning strike probability on a map; a data creation unit configured to create text data of an aircraft lightning probable area information on which the level of the expected lightning strike probability and a location are associated with each other by using the aircraft lightning probable information; and a transmission unit configured to transmit the text data to an aircraft.

Abstract: A plasma potential measuring method is conducted by: providing a measurement space surrounded by a radio-frequency electric field in plasma atmosphere; varying a floating potential at an electrode located in the measurement space by the ponderomotive effect acted only on electrons; and determining as a plasma potential a value of the floating potential at the time when an ion current flown into the electrode begins to lower.

Abstract: A plasma potential measuring method is conducted by: providing a measurement space surrounded by a radio-frequency electric field in plasma atmosphere; varying a floating potential at an electrode located in the measurement space by the ponderomotive effect acted only on electrons; and determining as a plasma potential a value of the floating potential at the time when an ion current flown into the electrode begins to lower.

Abstract: A laser beam is subjected to repeated reflection by a plurality of concave mirrors disposed in a confronting arrangement. Reflecting paths are centralized to form an interactive region of a high photon density. An interaction target such as gas, liquid, a solid body, plasma, a particle beam and an electron beam is introduced into the interactive region. Interaction with the laser beam causes optical interactions such as optical excitement, optical ionization, optical dissociation, optical synthesis, optical generation and optical analysis.

Abstract: Undulator is a device which produces a high intensity synchrotron radiation having narrow band width by making a relativistic electron beam undulate in an alternating magnetic field. It is possible to form a plasma micro-undulator which is very compact (size <1 cm) and by which a short-wavelength synchrotron radiation (visible to X-ray) can be produced, by illuminating a variable wavelength laser to a vapor atom generated from a high temperature evaporation source, at that time interfering two laser beams having the same wavelength to form an optical interference fringe and adjusting the wavelength of laser beam to the excitation energy of atom and producing a regular plasma-density-ripple corresponding to the light and shade of optical fringe by the multiple-step ionization scheme (resonance ionization).