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Title: Transmission-Line Modeling of Shielding Effectiveness of Multiple Shielded Cables with Arbitrary Terminations.

Abstract

Abstract not provided.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1371823
Report Number(s):
SAND2016-6619C
644928
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the EMTS 2016 held August 14-18, 2016 in Espoo, Finland.
Country of Publication:
United States
Language:
English

Citation Formats

campione, salvatore, Basilio, Lorena I., Warne, Larry K., and Langston, William L. Transmission-Line Modeling of Shielding Effectiveness of Multiple Shielded Cables with Arbitrary Terminations.. United States: N. p., 2016. Web. doi:10.1109/URSI-EMTS.2016.7571517.
campione, salvatore, Basilio, Lorena I., Warne, Larry K., & Langston, William L. Transmission-Line Modeling of Shielding Effectiveness of Multiple Shielded Cables with Arbitrary Terminations.. United States. doi:10.1109/URSI-EMTS.2016.7571517.
campione, salvatore, Basilio, Lorena I., Warne, Larry K., and Langston, William L. 2016. "Transmission-Line Modeling of Shielding Effectiveness of Multiple Shielded Cables with Arbitrary Terminations.". United States. doi:10.1109/URSI-EMTS.2016.7571517. https://www.osti.gov/servlets/purl/1371823.
@article{osti_1371823,
title = {Transmission-Line Modeling of Shielding Effectiveness of Multiple Shielded Cables with Arbitrary Terminations.},
author = {campione, salvatore and Basilio, Lorena I. and Warne, Larry K. and Langston, William L.},
abstractNote = {Abstract not provided.},
doi = {10.1109/URSI-EMTS.2016.7571517},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

Conference:
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  • Abstract not provided.
  • Our paper reports on a transmission-line model for calculating the shielding effectiveness of multiple-shield cables with arbitrary terminations. Since the shields are not perfect conductors and apertures in the shields permit external magnetic and electric fields to penetrate into the interior regions of the cable, we use this model to estimate the effects of the outer shield current and voltage (associated with the external excitation and boundary conditions associated with the external conductor) on the inner conductor current and voltage. It is commonly believed that increasing the number of shields of a cable will improve the shielding performance. But thismore » is not always the case, and a cable with multiple shields may perform similar to or worse than a cable with a single shield. Furthermore, we want to shed more light on these situations, which represent the main focus of this paper.« less
  • The shielding effectiveness of single conductor shielded flat cables was studied to determine if shield and conductor geometry changes could reduce shield leakage. Common cable defects were also evaluated to establish their effect on shield effectiveness. Present design configuration flat shielded cables utilizing two shield layers the same width as the center conductor were evaluated using a Singer Stoddart shield leakage detector to establish average reference shield leakage values. Cables with their center conductor width reduced to less than the width of the shield layers were evaluated and compared to the present design cables. The results indicated that cables withmore » reduced center conductor width exhibited significantly less leakage than the present design cables. To determine if further reduction of the center conductor width would increase the leakage attenuation, cables were fabricated with the center conductor width very narrow compared to the shield width. Leakage evaluation showed this to be of no advantage. A sample cable made with a solid wrap-around shield was found to allow much less leakage than the reduced center conductor width design. The shield was fabricated by flattening seamless aluminum tubing around the insulated flat center conductor. Shield defects, shifted conductors, and shifted shield layers were found to increase leakage on the flat cables of both the presently used and the reduced conductor designs.« less
  • AC losses in two, one-meter-long lengths of HTS prototype multi-strand conductors (PMC`s) are measured with a temperature-difference calorimeter. Both single-phase and three-phase losses are examined with ac currents up to 1,000 A rms. The calorimeter, designed specifically for these measurements, has a precision of 1 mW. PMC {number_sign}1 has two helically-wound, non-insulated layers of HTS tape (19 tapes per layer), each layer wrapped with opposite pitch. PMC {number_sign}2 is identical except for insulation between the layers. The measured ac losses show no significant effect of interlayer insulation and depend on about the third power of the current--a result in agreementmore » with the Bean-Norris model adapted to the double-helix configuration. The three-phase losses are a factor of two higher than those exhibited by a single isolated conductor, indicating a significant interaction between phases.« less