Accession Number : ADA327847

Title :   Passive Shielding for Low Frequency Magnetic Films.

Descriptive Note : Final rept. 13 Mar 96-27 Jun 97,

Corporate Author : DAMASKOS INC CONCORDVILLE PA

Personal Author(s) : Damaskos, Nickander J. ; Kelsall, Benuel J. ; Smoot, Mark A.

PDF Url : ADA327847

Report Date : 30 JUL 1997

Pagination or Media Count : 43

Abstract : Report developed under SBIR Contract. An approach to low frequency shielding is shown with application to suppression of electromagnetic fields emanating from rail gun barrels and power cable busses. Damaskos, Inc.'s Thin-Shield materials are applied to a scaled electric gun barrel as continuous unbroken coatings that are directly deposited onto the barrel and as planar coatings that are wrapped around the barrel. Significant attenuations are observed in both cases. Shielding effectiveness of the order of 30 dB was measured from 10 Hz to 1000 Hz and above. An analysis in cylindrical coordinates confirms the qualitative behavior of observed near field shielding effectiveness for non-magnetic coating. Further refinement of the numerical computation is required to model a magnetic coating. Recommendations are offered for further development and scaled up demonstrations.

Descriptors :   *COATINGS, *ELECTROMAGNETIC SHIELDING, GUN BARRELS, FILMS, PASSIVE SYSTEMS, NUMERICAL METHODS AND PROCEDURES, LOW FREQUENCY, NEAR FIELD, ELECTRIC GUNS.

Subject Categories : Electromagnetic Shielding
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE