Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes

Linear space charge perturbations of focused electron beams flowing between cylindrical and spherical electrodes on convergent or divergent trajectories are studied, and the amplification of high-frequency signals when the flow is modulated at one electrode is computed. It is shown that divergent be...

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Detalles Bibliográficos
Autores principales: Gnavi, G., Gratton, F.T.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1070664X_v1_n11_p3676_Gnavi
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spelling todo:paper_1070664X_v1_n11_p3676_Gnavi2023-10-03T16:02:33Z Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes Gnavi, G. Gratton, F.T. Linear space charge perturbations of focused electron beams flowing between cylindrical and spherical electrodes on convergent or divergent trajectories are studied, and the amplification of high-frequency signals when the flow is modulated at one electrode is computed. It is shown that divergent beams give the largest amplification effect. The instability of electron beams drifting through grounded grids (Pierce instability in cylindrical or spherical diodes) is also considered. The instability threshold occurs at higher critical currents when the curvature of the electrodes is large. Results for planar electrodes are recovered in the limit of zero curvature devices. Spherical configurations have better signal amplification and stability properties than similar planar or cylindrical systems. © 1994 American Institute of Physics. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1070664X_v1_n11_p3676_Gnavi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Linear space charge perturbations of focused electron beams flowing between cylindrical and spherical electrodes on convergent or divergent trajectories are studied, and the amplification of high-frequency signals when the flow is modulated at one electrode is computed. It is shown that divergent beams give the largest amplification effect. The instability of electron beams drifting through grounded grids (Pierce instability in cylindrical or spherical diodes) is also considered. The instability threshold occurs at higher critical currents when the curvature of the electrodes is large. Results for planar electrodes are recovered in the limit of zero curvature devices. Spherical configurations have better signal amplification and stability properties than similar planar or cylindrical systems. © 1994 American Institute of Physics.
format JOUR
author Gnavi, G.
Gratton, F.T.
spellingShingle Gnavi, G.
Gratton, F.T.
Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
author_facet Gnavi, G.
Gratton, F.T.
author_sort Gnavi, G.
title Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
title_short Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
title_full Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
title_fullStr Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
title_full_unstemmed Microwave signal amplification and Pierce instability on radial electron flows in cylindrical and spherical diodes
title_sort microwave signal amplification and pierce instability on radial electron flows in cylindrical and spherical diodes
url http://hdl.handle.net/20.500.12110/paper_1070664X_v1_n11_p3676_Gnavi
work_keys_str_mv AT gnavig microwavesignalamplificationandpierceinstabilityonradialelectronflowsincylindricalandsphericaldiodes
AT grattonft microwavesignalamplificationandpierceinstabilityonradialelectronflowsincylindricalandsphericaldiodes
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