Laser Induced EMP (Electromagnetic Pulse) at 10.6 Microns
Abstract
An extensive experimental session was analyzed (1200 shots) to investigate the behavior of Laser Induced Electromagnetic Pulse (LIEMP) parametrically with CO2 laser intensity within a decade of 10 GW/sq cm 2 and with air pressure from 1 microtorr to a torr. Measured electric fields on a ground plane and current measured 3 cm from the target were compared to theory. One hundred eV suprathermal electrons (1.6 keV maximum energy) create the LIEMP after laser light, self-focussed a few fold, is resonantly absorbed. The model predicts electric field scaling as Intensity(1/2) as observed, but current scaling is not reproduced. The electric fields are no threat for CO2 and shorter wavelengths, but may pose a threat for millimeter waves. Pressure dependencies are reproduced with classical energy loss in gasses.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1987
- Accession Number
- ADA183892
Entities
People
- Glen Dahlbacka
- John Guillory