Accession Number:

ADA030082

Title:

Laser Generated Magnetic Fields

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1976-06-01

Pagination or Media Count:

91.0

Abstract:

A sequence of laser pulses focussed onto the same spot on a target produces evaporation of target material and the formation of a crater with crater depth increasing from shot to shot. An experimental study of the crater- depth dependence of the magnetic fields generated by the laser produced plasmas has been performed. Repeated irradiation of an aluminum target with a laser pulse of 10 to the 12th power Wcm squared in a low background pressure of air at 10 to the -5 power Torr produced magnetic fields as high as 1500 G and at a rate of .055 mmshot excavated a hole nearly 4 mm deep and 2 mm wide at the target surface. Optical micrographs were taken of the target crater surface and of craters sectioned for examination by a scanning electron microscope. An independent determination of the plasma-electron temperature was obtained from the x-ray emission continuum of the plasma.

Subject Categories:

  • Fusion Devices (Thermonuclear)
  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE