Observation of resonance overlap in a traveling wave tube
Abstract
For wave particle interaction, the 1D beam plasma system can be advantageously replaced by a Traveling Wave Tube (TWT). A small cold test electron beam propagates along the axis of the TWT and interacts with one or two waves which are launched on the slow wave structure (a 4 m long helix) of the TWT. The beam kinetic energy is much lower than the wave(s) energy. A trochoidal energy analyzer records the beam energy distribution at the output of the TWT. The resonant velocity domain associated to one wave can thus be observed as well as the transition to large scale stochasticity when the resonant velocity domains of two waves overlap.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPCP1057D