ULTRA-LOW-NOISE TRAVELING-WAVE TUBES.

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)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1966
Accession Number
AD0638447

Entities

People

  • Bruno Zotter

Organizations

  • United States Army Communications-Electronics Command

Tags

DTIC Thesaurus Topics

  • Couplings
  • Low Noise
  • Magnetic Fields
  • Magnets
  • Noise
  • Noise Reduction
  • Space Charge
  • Superconducting Magnets
  • Transverse
  • Traveling Wave Tubes
  • Traveling Waves
  • Waves

Fields of Study

  • Physics

Readers

  • Electronics Engineering
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster