Title :
Conversion efficiency in axial monotrons
Author :
Barroso, Joaquim J.
Author_Institution :
Assoc. Plasma Lab., Nat. Inst. for Space Res.-INPE, Sao Jose dos Campos, Brazil
Abstract :
A comparative study is given on the bunching mechanisms which develops in transit-time tubes with RF-field bunching, often referred to as monotrons. Uniform and stepped wise longitudinal electric-field profiles are discussed, and it is shown that the two-fold enhancement in the conversion efficiency of a monotron operating in the ¿ mode-instead of the longitudinally uniform TM010 mode for which the efficiency is limited to 20 percent-arises from a phase synchronization process due to the action of RF electric fields of reversed signs in each partition of the bisected cavity.
Keywords :
electric fields; microwave generation; microwave tubes; particle beam bunching; synchronisation; RF electric fields; RF-field bunching; axial monotrons; bisected cavity; bunching mechanisms; conversion efficiency; longitudinal electric-field profiles; phase synchronization process; transit-time tubes; Radio frequency; conversion efficiency; electron bunching; microwave generation; monotrons; transit-time microwave tube;
Conference_Titel :
Microwave and Optoelectronics Conference (IMOC), 2009 SBMO/IEEE MTT-S International
Conference_Location :
Belem
Print_ISBN :
978-1-4244-5356-6
Electronic_ISBN :
1679-4389
DOI :
10.1109/IMOC.2009.5427621
