Accession Number:

AD0655002

Title:

STUDY OF TRANSVERSE WAVE INTERACTIONS.

Descriptive Note:

Triannual rept. no. 2, 1 Sep-31 Dec 66,

Corporate Author:

UTAH UNIV SALT LAKE CITY MICROWAVE DEVICE AND PHYSICAL ELECTRONICS LAB

Report Date:

1967-07-01

Pagination or Media Count:

63.0

Abstract:

The purpose of this project is to evaluate analytically and experimentally the interaction between a rotating electron beam and wave guide fields. The methods of analysis include use of a general coupled-mode theory, a ballistic computer program, and an experimental evaluation. An analysis of possible beam-flow patterns has been carried out by choosing some parameters and then numerically solving the equations for the resulting beam-flow characteristics. The interaction effect of multiple beams in the circuit has been considered by extending the coupled-mode theory to the multiple-beam case. The results of electron velocity spread have been investigated experimentally by modification of the device which results in a beam with higher velocity spread. The beam-flow analysis gives the properties of a proposed type of beam for use in a rotating beam interation. The multiple-beam interaction analysis indicates that the effect of multiple beams is a reduction in interaction strength which corresponds to the spatial variation of the wave guide fields. Axial velocity spread is found to seriously reduce the interaction strength. The beam-flow analysis and multiple-beam interaction suggest that the best approach to beam launching is to optimize the rotation of individual electrons rather than try to use a beam of the ideal form. Device interaction reveals that a beam-forming electrode in the gun will reduce the axial velocity spread and significantly improve the interaction strength. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE