Transient ion disturbances in traveling wave tubes

Tighe, W.; Goebel, Dan M.; Thorington, C.B.

doi:10.1109/16.892172

Cited by 14 publications

(1 citation statement)

References 12 publications

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“…It should also be noted that the beam densification in this region creates a potential well for ions whose axial oscillations in such a well contribute to the noise in microwave devices. (Although the role of this effect, which is often called "ion noise", has been recognized for a long time [14,15], this issue is actively studied even nowadays [16,17,18]. )…”

Section: Helix Anode Gridmentioning

confidence: 99%

Beam matching in pasotrons

Bliokh¹,

Nusinovich²,

Felsteiner³

et al. 2003

AIP Conference Proceedings

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Electron beams propagating in the ion focused regime (Bennett pinch) are of interest for various sources of coherent electromagnetic radiation (pasotrons, ion-channel lasers, ion-channel guided free-electron lasers). The transition of a beam from a quasi-laminar state near the gun to a phase-mixed equilibrium state is accompanied with appearance of betatron oscillations. In pasotrons these oscillations play a negative role because they often result in certain beam losses due to the interception of beam electrons oscillating with large amplitudes by the chamber walls. The betatron oscillations and the beam losses can be monitored by using a weak local external magnetic field (magnetic lens) in the transition region. The results obtained show that, by using a properly designed and positioned magnetic lens, a halo in the phase-mixed beam can be greatly reduced and the beam losses can be practically eliminated.

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Section: Helix Anode Gridmentioning

confidence: 99%