Investigation of Transient Forces Produced by Gases Expelled from Rapidly Heated Surfaces

Abstract

A torsional impulse balance has been developed as a new diagnostic tool to study fundamental processes in laser-surface interactions. The impulse balance has been designed and tested with a robust calibration system to measure impulsive forces with resolution as low as 1 nano-Newton-second. A simple technique has been developed to accurately determine the force as a function of time from the motion of the nano-impulse balance system (NIBS). This technique will be useful in examining the transient responses of photon-surface interactions. Initial ablation measurements using anodized aluminum plates at vacuum and with various background gases are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA446155

Entities

People

  • A. D. Ketsdever
  • B. C. Souza
  • E. P. Muntz

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Ablation
  • Abstracts
  • Acquisition
  • Aluminum
  • Balances
  • Calibration
  • Data Acquisition
  • Data Sets
  • Gas Dynamics
  • Laser Beams
  • Laser Pulses
  • Lasers
  • Materials
  • Measurement
  • Mechanical Engineering
  • Surface Temperature
  • Yag Lasers

Fields of Study

  • Physics

Readers

  • Aerospace Propulsion Engineering.
  • Fluid Dynamics.
  • Metallurgy

Technology Areas

  • Directed Energy