THALLIUM BEAM TUBE RESEARCH.

Abstract

Task I. Additional testing of an iridium ionizer showed an ionization efficiency for thallium of 3.7% depending markedly on ambient pressure at lower temperatures. Attempts were made to deposit higher work function coatings on tantalum, but the deposits did not adhere. Other possible methods of ionizing a thallium beam have been studied. Task II. Tests on an X-band model of a proposed thallium waveguide structure showed the necessity for adequate mode suppression in order to use the coaxial design. Further, the extension of the bare quartz inner cylinder in a region of high electric field in the ends of the cavity appears to be unsatisfactory. Calculations were made on the perturbation caused by putting the cylinder at the electric field null of a cavity operating in the TE(021) mode. Task III. A prototype quadrupole magnet is under construction. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 30, 1965
Accession Number
AD0618105

Entities

People

  • Richard F. Lacey

Tags

DTIC Thesaurus Topics

  • Construction
  • Efficiency
  • Electric Fields
  • Ionization
  • Models
  • Perturbations
  • Prototypes
  • Tantalum
  • Thallium
  • Waveguides
  • Work Functions
  • X Band

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science and Engineering.
  • Plasma Physics.