Use of Electron Beam Gun for Hard Rock Excavation

Abstract

An electron beam gun (EBG), which is not funded by the contract, is operational at low power and will be shipped to the field site in 4 to 6 weeks. Design and manufacturing effort on the EBG carriage was completed in June, and the carriage is undergoing preliminary operational and calibration tests. The Raymond Granite Company's quarry, located near Yosemite National Park, has been selected as the test site, because it has extensive sources of unfractured rock. A mathematical model has been developed that can describe the piercing of the rock by the electron beam and the thermal stresses subsequently produced. Trends in the time development of the calculated stress fields confirm laboratory observations for at least one geometry.

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Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1971
Accession Number
AD0732453

Entities

People

  • Berthold W. Schumacher
  • David R. Nixon

Organizations

  • Westinghouse Electric Corporation

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Birds
  • Electron Beams
  • Energy
  • Equations
  • Failure Mode And Effect Analysis
  • Field Tests
  • Isotherms
  • Laboratory Tests
  • Materials
  • Mechanical Properties
  • Mechanics
  • Motor Generators
  • Tensile Strength
  • Tensile Stress
  • Test And Evaluation
  • Thermal Stresses
  • X Rays

Readers

  • Explosive Engineering.
  • Materials Science (Mechanical Engineering).
  • Software Engineering

Technology Areas

  • Directed Energy
  • Microelectronics