1. Linear longitudinal oscillations in collisionless plasma diodes with thin sheaths. Part I. Method
2. Most of the concepts and symbols to be used in the present paper were already introduced in Part I, and references to the latter will be indicated by the suffix∕I. Thus, Eq. (14) and Sec. II B of Part I are referred to as Eq. (14)∕I and Sec. II B∕I, respectively. Here, as in Part I, equilibrium quantities and perturbations are denoted by bar and tilde, respectively.
3. Limiting Stable Current in Electron Beams in the Presence of Ions
4. Note on Stability of Electron Flow in the Presence of Positive Ions