Design of Magnetically Tunable Magnetron Injection Guns for Gyrotrons at Multiple Frequencies

Author

Singh, Udaybir ; Kumar, Nitin ; Purohit, L.P. ; Sinha, A.K.

Author_Institution

Microwave Tube Area, Council of Sci. & Ind. Res., Pilani, India

Volume

39

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

1082

Lastpage

1085

Abstract

In this paper, the design of a triode-type magnetically tunable magnetron injection gun (MT-MIG) is presented for 1-MW 110-, 120-, and 127.5-GHz-frequency gyrotrons with the various operating modes. Some basic equations relevant to the problem available in the literature have been used to obtain the preliminary design. Computer simulation has been performed by using the commercially available code EGUN. The triode-type MT-MIG with the accelerating voltage of 80 kV, the beam current of 40 A, the average transverse-to-axial velocity ratio of the electron beam of 1.26-1.35, and the maximum transverse velocity spread of less than 5% has been designed. Tuning of the MT-MIG is performed by varying the magnetic field.

Keywords

electron beams; electron guns; gyrotrons; magnetrons; millimetre wave tubes; triodes; computer simulation; current 40 A; electron beam; frequency 110 GHz; frequency 120 GHz; frequency 127.5 GHz; gyrotrons; magnetic field; power 1 MW; transverse-to-axial velocity ratio; triode type magnetically tunable magnetron injection gun design; triode-type MT-MIG; voltage 80 kV; Cathodes; Cavity resonators; Coils; Electron beams; Gyrotrons; Superconducting magnets; Gyrodevice; magnetically tunable MIG (MT-MIG); magnetron injection gun (MIG); multifrequency gyrotron;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2106517

Filename

5719632