An Engineering Tool for the Prediction of Internal Dielectric Charging

Details An Engineering Tool for the Prediction of Internal Dielectric Charging An Engineering Tool for the Prediction of Internal Dielectric Charging

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf..125r&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.125-130

Other

Scientific paper

A practical internal charging tool has been developed. It provides an easy-to-use means for satellite engineers to predict whether on-board dielectrics are vulnerable to electrostatic discharge in the outer radiation belt. The tool is designed to simulate irradiation of single-dielectric planar or cylindrical structures with or without shielding. Analytical equations are used to describe current deposition in the dielectric. This is fast and gives charging currents to sufficient accuracy given the uncertainties in other aspects of the problem - particularly material characteristics. Time-dependent internal electric fields are calculated, taking into account the effect on conductivity of electric field, dose rate and temperature. A worst-case model of electron fluxes in the outer belt has been created specifically for the internal charging problem and is built into the code. For output, the tool gives a YES or NO decision on the susceptibility of the structure to internal electrostatic breakdown and if necessary, calculates the required changes to bring the system below the breakdown threshold. A complementary programme of laboratory irradiations has been carried out to validate the tool. The results for Epoxy-fibreglass samples show that the code models electric field realistically for a wide variety of shields, dielectric thicknesses and electron spectra. Results for Teflon samples indicate that some further experimentation is required and the radiation-induced conductivity aspects of the code have not been validated.

Affiliated with

Also associated with

No associations

Rating

An Engineering Tool for the Prediction of Internal Dielectric Charging does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An Engineering Tool for the Prediction of Internal Dielectric Charging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Engineering Tool for the Prediction of Internal Dielectric Charging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-805039