Repetitively Pulsed CO2 Laser-Target Interaction

Abstract

Thermal coupling of CO2 laser energy to metal surfaces of aluminum, titanium, stainless steel and copper has been measured under large-spot, repetitively pulsed conditions using the AVCO Humdinger, Sr., laser. Measurements were made at atmospheric pressure with a Mach 0.4 air flow transverse to the target surface and in a low-pressure environment of approx. 3 torr. The multipulse coupling measured with Humdinger, Sr., is consistently less than previous measurements of single-pulse and small-spot multipulse coupling measured at other laser facilities. Time-resolved measurements of the energy deposition indicate that the differences in the various sets of coupling data may be due to pulse shape effects.

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Document Details

Document Type
Technical Report
Publication Date
Aug 30, 1976
Accession Number
ADA031810

Entities

People

  • Daniel L. Mooney
  • Scott K. Manlief
  • Stephen Marcus

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Atmospheres
  • Calorimeters
  • Carbon Dioxide Lasers
  • Detectors
  • Dielectrics
  • Energy Transfer
  • Laser Pulses
  • Laser Target Interactions
  • Laser Targets
  • Materials
  • Measurement
  • Optical Materials
  • Repetition Rate
  • Stainless Steel
  • Surface Temperature
  • Transverse

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy