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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 Dielectric wall accelerator ： ウィキペディア英語版 Dielectric wall accelerator A Dielectric Wall Accelerator (DWA) is a compact linear particle accelerator concept designed and patented in the late 1990s, that works by inducing a travelling electromagnetic wave in a tube which is constructed mostly from dielectric material. The main conceptual difference to a conventional disk-loaded linac system is given by the additional dielectric wall and the coupler construction. Possible uses of this concept include its application in external beam radiotherapy (EBRT) using protons or ions. ==Operation== An external alternating-current power supply provides an electromagnetic wave that is transmitted to the accelerator tube using a waveguide. The power supply is switched on only a very short time (pulsed operation).〔 Electromagnetic induction creates a traveling electric field, which accelerates charged particles. The traveling wave overlaps with the position of the charged particles, leading to their acceleration inside as they pass through the tube's vacuum channel.〔 The field inside the tube is negative just ahead of the proton and positive just behind the proton. Because protons are positively charged, they accelerate toward the negative and away from the positive. The power supply switches the polarity of the sections, so they stay synchronized with the passing proton. 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「Dielectric wall accelerator」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.