Structure of energetic radiation bursts observed during winter thunderstorms

Tatsuo Torii1, Takeshi Sugita2, Takashi Hasegawa3 and Kyo Kume3, (1)Japan Atomic Energy Agency, Naka-Gun, Tokai-Mura, Japan, (2)Science & System Laboratory Inc., Kasama-shi, Japan, (3)Wakasawan Energy Research Center, Tsuruga-shi, Japan