Chaotic dynamics and coherent structure in electron beam with virtual   cathode in the diode with local neutralization
  The paper consider a complex dynamics of electron beam with virtual cathode and local neutralization of the beam charge density near anode. Different types of nonlinear behaviour, including deterministic chaos, were treated. It is shown that chaotic dynamics arises as results of spatiotemporal structures interaction. 
V. G. Anfinogentov, A. E. Hramov (College of Applied Science, Saratov   State University)