Use of Electron Beam Gun for Hard Rock Excavation

Abstract

Because of alignment problems, output power of the electron beam gun (EBG), not funded by the contract, has been restricted to about 12 kW. Installation of beam position sensors and a closed-loop beam positioning system should permit continuous operation at the desired 36-kW level. Thermal stress calculations of the Second Quarterly Report have been repeated for a reduced thermal diffusivity. The results are similar except that the width of the stressed region is reduced by 15 to 20 percent. Computer plots of the probability density show the points at which cracks are most likely to start.

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 1971
Accession Number
AD0732454

Entities

People

  • Berthold W. Schumacher
  • David R. Nixon

Organizations

  • Westinghouse Electric Corporation

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Differential Equations
  • Electron Beams
  • Energy
  • Failure Mode And Effect Analysis
  • Field Tests
  • Heat Exchangers
  • Hypervelocity Flow
  • Laboratory Tests
  • Materials
  • Mechanical Properties
  • Mechanics
  • Probability
  • Tensile Strength
  • Tensile Stress
  • Test And Evaluation
  • Thermal Diffusivity
  • Thermal Stresses

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Geotechnical Engineering.
  • Materials Science (Mechanical Engineering).

Technology Areas

  • Directed Energy
  • Microelectronics
  • Microelectronics - Microelectromechanical Systems