ロケットによって誘発された雷の時に発生するエネルギー放射
Joseph R Dwyer1, Martin A Uman, Hamid K Rassoul
1Department of Physics and Space Sciences, Florida Institute of Technology, Melbourne, FL 32901, USA.
Science (New York, N.Y.)
|February 1, 2003
まとめ
稲妻のダート・リーダー・フェーズで,激しい放射線爆発が検出されました. これは,脱走した電子が雷のプロセスにおいて極めて重要であることを示唆しています.
科学分野:
- 大気物理学 大気物理学
- プラズマ物理学のプラズマ物理学
- 電磁気学は,電磁気学である.
背景:
- 雷は複雑な大気中の電気放電である.
- ダート・リーダー・フェーザは,いくつかの雷の出来事において,リターン・ストロックの先行する.
- 雷の誘発におけるエネルギー粒子の役割は完全に理解されていません.
研究 の 目的:
- ロケットで誘発される雷のダートリーダーフェーズ中のエネルギー放射を調査するために.
- 脱走電子の生成が雷で有意であるか否かを判断する.
主な方法:
- イオジウムナトリウム (タリウム活性化) [NaI ((Tl)) ]シンチレーション検出器を使用しました.
- 電気的に騒がしい環境で検出器を展開しました.
- ロケットで発射された雷の際に測定されたエネルギー放射爆発 (10キロ電子ボルト以下).
主要な成果:
- 測定された37回中31回で,強烈な放射線爆発が観測されました.
- バストは,ダート・リーダー・フェーズで,リターン・ストロークの直前または開始時に発生した.
- 典型的なバーストの持続時間は100マイクロ秒未満で,数十メガ電子ボルトを貯蔵しました.
結論:
- この発見は,雷の時に放蕩した電子の生成の有力な証拠を提供する.
- 逃げ出した電子は,雷の発生と拡散における重要なプロセスである可能性が高い.
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