Accession Number : AD0638447

Title :   ULTRA-LOW-NOISE TRAVELING-WAVE TUBES.

Descriptive Note : Interim rept.

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J ELECTRONIC COMPONENTS LAB

Personal Author(s) : Zotter,Bruno

Report Date : AUG 1966

Pagination or Media Count : 16

Abstract : The influence of high magnetic fields in the gun region on the noise figure of traveling-wave tubes was investigated experimentally and analytically. The experiments were performed with a superconducting magnet capable of fields up to 30,000 gauss. Noise reduction of over 2 db was measured. The analytical work resulted in a model which attributes the dependence of noise figure on magnetic fields to the coupling of axially symmetric space charge and transverse modes. Enhancement of the coupling mechanism is predicted for annular beams and for beams in magnetic field gradients. (Author)

Descriptors :   (*TRAVELING WAVE TUBES, *NOISE(RADIO)), NOISE, REDUCTION, MAGNETIC FIELDS, SUPERCONDUCTORS, MAGNETS, ELECTRON OPTICS

Subject Categories : Electrical and Electronic Equipment
      Cybernetics
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE