Effects of the energy spread of secondary electrons in a dc-biased single-surface multipactor
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- Effects of the energy spread of secondary electrons in a dc-biased single-surface multipactor
- Hur, Min Sup; Kim, Jung-Il; Kim, Geun-Ju; Jeon, Seok-Gy
- Electron bunch; Energy spreads; Monoenergetic; Parameter range; Particle-in-cell simulations; Phase lock; Secondary electrons; Single-surface multipactor; Stability and bifurcation; Theoretical result; Zero velocity
- Issue Date
- AMER INST PHYSICS
- PHYSICS OF PLASMAS, v.18, no.3, pp.1 - 8
- The effects of the energy spread of secondary electrons are theoretically investigated for a dc-biased single-surface multipactor. In our previous publication [S. G. Jeon et al., Phys. Plasmas 16, 073101 (2009)], we obtained the conditions for the phase lock of an electron bunch, assuming zero velocity spread of the secondary electrons. In this work, we extended our previous theory to derive a quadratic map, by which the stability and bifurcation of the electron bunch can be systematically investigated. For the study of the energy spread of the secondary electrons, a randomized term was added to this map. The modified map then showed significant smearing-out of the bifurcated branches. The theoretical results were verified by particle-in-cell simulations, which showed good agreement in wide parameter ranges for both cases of monoenergetic and energy-spread secondary electrons.
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