Power-Microwave Sources
| Code | 709 |
|---|---|
| Semester | Spring |
| Class Hours - Lab Hours | 3 - 0 |
Description
Α. Introduction to power microwave sources and to electron beams:
• Basic layout, energy balance, vacuum requirments, cathode constraints (Child-Langmuir, Richardson-Dushman).
• Relativistic dynamics, electron motion in basic field geometries (Ε field, uniform Β field, crossed Ε and Β fields, Β field with mild non-uniformity, longitudinal or transverse, or with curvature).
• Consequenses of electron-beam self fields (relativistic Child-Langmuir flow, Brillouin limit for rotational equilibrium, Brillouin flow in magnetically insulated anode).
Β. Classification, principle of operation and basic design approaches:
• Resonances (axial and transverse, fundamental and harmonic).
• Wave response of electron beam, coupling to waveguide equations, calculation of gain.
• Weak-signal analysis in an oscillator and calculation of growth rate.
• Strong-signal analysis and determination of saturation level and of efficiency.
• Specialization to travelling-wave tube, klystron, magnetron, gyrotron, cyclotron-resonance maser, free-electron laser.