Other
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..609r&link_type=abstract
In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla
Other
Space Environment, Materials
Scientific paper
Simulation of the internal charging hazard from dielectric materials can be performed with a suitable simulation tool, such as DICTAT. This calculates the charge deposition rate across the material and simulates the electric fields that result, taking into account the conducted current. This calculation relies on good knowledge of material parameters, in particular: intrinsic conductivity; radiation-induced conductivity coefficients; dielectric constant; and the characteristic 'activation energy' for the temperature dependence of conductivity. These parameters need to be found experimentally. They can be found by direct measurement, e.g. by applying test voltages across dielectric samples. However, such measurements are complicated and generally involve multiple test facilities. In addition, the applicability of the parameters obtained to the internal charging process is open to question. An alternative standard testing method has been created. This uses irradiation of the sample by penetrating electrons, i.e. a recreation of the internal charging process in a laboratory chamber. Measurements of the surface potential of the sample are taken under a carefully selected set of irradiation conditions. A single test facility is used for all the tests. A fitting tool, called DICFIT, uses the algorithms from DICTAT to derive the material parameters from the experimental data. The result of this method is a set of material parameters that are compatible with each other, truly applicable to the internal charging process and optimally suited for use within DICTAT.
Lévy Laurent
Rodgers D. J.
Ryden Keith A.
Sörensen John
Wrenn Gordon L.
No associations
LandOfFree
Fitting of material parameters for DICTAT internal dielectric charging simulations using DICFIT 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 Fitting of material parameters for DICTAT internal dielectric charging simulations using DICFIT, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fitting of material parameters for DICTAT internal dielectric charging simulations using DICFIT will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1153206