Development of a Time Synchronized CW-Laser Induced Fluorescence Measurement for Quasi-Periodic Oscillatory Plasma Discharges

Abstract

An advanced CW laser induced fluorescence diagnostic technique, capable of correlating high frequency current fluctuations to the resulting fluorescence excitation lineshapes, has been developed. This presentation describes this so-called "Sample-Hold'' method of time-synchronization, and provides the steps taken to validate this technique, including simulations and experimental measurements on a 60 Hz Xe lamp discharge. Initial results for time-synchronized velocity measurements on the quasi-periodic oscillatory mode of a magnetic cusped plasma accelerator are also presented. These results show that the positions of the ionization and peak acceleration regions in the device vary over the course of a discharge current oscillation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2012
Accession Number
ADA593945

Entities

People

  • Mark Cappelli
  • Natalia A. Macdonald
  • William A. Hargus

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Amplifiers
  • Background Noise
  • Detection
  • Dye Lasers
  • Excitation
  • Fluorescence
  • Frequency
  • Ionization
  • Laser Applications
  • Laser Beams
  • Laser Induced Fluorescence
  • Lasers
  • Liquid Dye Lasers
  • Measurement
  • Pulsed Lasers

Fields of Study

  • Physics

Readers

  • Aerospace Propulsion Engineering.
  • Plasma Physics.
  • Wave Propagation and Nonlinear Chaotic Dynamics.

Technology Areas

  • Directed Energy