Deformation of the Electron Beam Distribution Function and Suppression of Electron Waves

抄録

The change in the electron beam distribution function due to the wave excited by the beam density modulation is observed, relating to the suppression of electron waves in a beam-plasma system. It is also found that, in spite of the dependence of the critical modulation voltage on the frequency difference between the modulation and the electron wave, the resulting potential amplitude of the excited wave has a constant value independently of the frequency difference.