電子サイクロトロン運動における希薄気体衝突の影響

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  • デンシ サイクロトロン ウンドウ ニ オケル キハク キタイ ショウトツ ノ エイキョウ
  • Denshi saikurotoron undō ni okeru kihaku kitai shōtotsu no eikyō
  • Effects of a dilute gas collision on the electron-cyclotron motion

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The mass-to-charge ratio, known as one of the important properties of the electron, is often measured by observing the electron motion in the magnetic field, called the electron-cyclotron motion. However, it is difficult to obtain an accurate value in student experiments because of errors inherent in the simple equipment. The main cause of errors is postulated to be the collisions between the electrons and helium atoms, which are enclosed in order to visualize the electron orbit using fluorescent light. We have developed the method to estimate the effects of collision and derived not only the mass-to-charge ratio accurately, but the collision cross section and the linear energy transfer to the gas.

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