Accession Number:

AD0416653

Title:

THEORETICAL AND EXPERIMENTAL INVESTIGATIONS OF LINEAR-BEAM MICROWAVE TUBES.

Descriptive Note:

Interium rept. no. 1.

Corporate Author:

CORNELL UNIV ITHACA N Y

Personal Author(s):

Report Date:

1963-07-01

Pagination or Media Count:

160.0

Abstract:

A new approach for enhancing the efficiency and possibly improving the velocity filtering action of klystrons is described. The approach involves circulating r-f power through the output cavity in the proper magnitude and phase so as to im prove the process of energy extraction from the electron beam. Theoretical and experimental in vestigations are being conducted concurrently into the effects of a moderate d-c scallop i.e., up to 30 per cent scallop on the small-signal, gridless-gap, r-f modulation of a Brillouin focused electron beam. A third-order solution of the nonlinear differential equation describing the beam radius as a function of axial distance is derived and verifies the validity of the sinus oidal solution for this degree of scallop. The theory of confined electron beams from convergent guns is reviewed and extended, and is used in designing a confined-flow gun. The general equa tions desbiibing the motion of elections in beams focused by axially symmetric, axially varying magnetic fields are given. Theraarameters and interaction phenomena associated with an inter action cavity are discussed and applied to the design and construction of a backward-wave, ring-rod structure for an experimental klystron. The initial phases of a study on ee first reversing mode of a double re-entrant klystron cavity are reviewed. Theoretical work is pre sented on both beam and circuit problems associ ated with the amplification of nanosecond pulses by microwave amplifiers. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE