DTIC ADA265955: Characterization of Electromagnetic Fields in pdf

DTIC ADA265955: Characterization of Electromagnetic Fields in

More Book Details

Description of the Book:

The electromagnetic (EM) fields present during testing in a large vacuum chamber at the Short Pulse Experimental Electron Device (SPEED) facility are observed and measured using B-dot and D-dot detectors. Because the cathode of the vacuum diode is exposed to the chamber, the EM fields are significant and could adversely affect nonfaraday-shielded experiments. The differential magnetic fields and electric fields are nearly isotopically distributed, build to a maximum at 100-200 ns of 7.9 x 10 to the 9th power A/m-s and 9 x 10 to the 10th power V/m-s, respectively, then decay for approximately 1000 ns. Fourier analysis of spectra gives frequencies (460, 550, and 60 MHz) characteristic of the dimensions of the chamber and of electrons rebounding between the target and the pulse generators. A collimated damper is designed which should eliminate most EM fields in future tests in this configuration

• Creator/s: Defense Technical Information Center
• Date: 4/1/1993
• Year: 1993
• Book Topics/Themes: DTIC Archive, Hunt, Kenneth K, PHYSITRON INC HUNTSVILLE AL, *ELECTROMAGNETIC FIELDS, *ELECTROMAGNETIC SHIELDING, DIODES, MAGNETIC FIELDS, SURVIVABILITY, PULSE GENERATORS, VACUUM CHAMBERS, SPECTRA, SHIELDING, TANTALUM, OSCILLOSCOPES, ELECTROMAGNETIC PULSES, FOURIER ANALYSIS, CURRENTS, ELECTRIC CURRENT, SIGNALS, ELECTRONS, X RAYS, ELECTRIC FIELDS, DETECTORS, SIMULATORS

An excerpt captured from the PDF book