Fabrication of a high performance acoustic emission (AE) sensor to monitor and diagnose disturbances in HTS tapes and magnet systems

Ju Hyung Kim, Jung Bin Song, Young Hun Jeong, Young Jin Lee, Jong Hoo Paik, Woo Seok Kim, Haigun Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Conduction noise attenuation by magnetic composite sheets along a microstrip line has been analyzed by using an electromagnetic field simulator that employs the finite element method. The simulation model consists of a microstrip line with planar input/output ports and noise absorbing materials of large magnetic loss (magnetic composite sheets containing iron flake particles as absorbent fillers). The input port is excited by a TEM-mode wave with a characteristic impedance of 50 Ω. Reflection and transmission parameters (S11 and S21) and power loss are calculated as a function of frequency with variation of the sheet size and thickness. The simulated values are in good agreement with experimental results and the estimated size dependency of power absorption is consistent with transmission line theory. It is proposed that the simulation technique can be effectively used in the design and characterization of noise absorbing materials in high-frequency transmission lines.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalMetals and Materials International
Volume16
Issue number1
DOIs
Publication statusPublished - 2010 Feb

Keywords

  • Computer simulation
  • Electrical properties
  • Magnetic materials
  • Noise absorbers
  • Powder processing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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