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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Frans Michel Penning ： ウィキペディア英語版 Frans Michel Penning Frans Michel Penning (12 September 1894 – 6 December 1953) was a Dutch experimental physicist.〔(【引用サイトリンク】title=Frans Michel Penning (1894-1953) )〕 He received his PhD from the University of Leiden in 1923, and studied low pressure gas discharges at the Philips Laboratory in Eindhoven, developing new electron tubes during WWII. Many detailed observations of gas ionization were done with colleagues, finding notable results for helium and magnetic fields. He made precise measurements of Townsend coefficients and cathode voltage fall. ==Penning trap== The Penning trap stores charged particles by magnetic and electric fields. It was named after Penning by Hans Georg Dehmelt who built the first trap. Dehmelt got inspiration from the vacuum gauge built by Penning where a current through a discharge tube in a magnetic field is proportional to the pressure. Penning traps are currently used for magnetic measurements and are an active research topic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Frans Michel Penning」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.