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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 Quantum excitation (accelerator physics) ： ウィキペディア英語版 Quantum excitation (accelerator physics) Quantum excitation is the effect in circular accelerators or storage rings whereby the discreteness of photon emission causes the charged particles (typically electrons) to undergo a random walk or diffusion process. ==Mechanism== An electron moving through a magnetic field emits radiation. One can compute the expected amount of radiation by computing the classical power. Considering quantum mechanics, however, one finds that this radiation is emitted in discrete packets of photons. For this description, one should determine the distribution of number of emitted photons and also the energy spectrum for the electron. In particular, the spectrum of a bending magnet is given by : $S(\backslash xi)=\backslash frac\backslash xi\backslash int\_0^\backslash infty\; K\_(\backslash bar\; \backslash xi)\; d\backslash bar\; \backslash xi$ The diffusion coefficient is given by : $d=\; \backslash dot\; N\backslash langle\; u^2\backslash rangle$ The result of this calculation is : $d=\; \backslash frac\backslash frac$ 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「Quantum excitation (accelerator physics)」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.