| ac Modeling and impedance spectrum tests of the superconducting magnetic field coils for the Wendelstein 7-X fusion experiment. | |
| | |
MedLine Citation:
|
PMID: 17979447 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The impedance spectrum test was employed for detection of short circuits within Wendelstein 7-X (W7-X) superconducting magnetic field coils. This test is based on measuring the complex impedance over several decades of frequency. The results are compared to predictions of appropriate electrical equivalent circuits of coils in different production states or during cold test. When the equivalent circuit is not too complicated the impedance can be represented by an analytic function. A more detailed analysis is performed with a network simulation code. The overall agreement of measured and calculated or simulated spectra is good. Two types of short circuits which appeared are presented and analyzed. The detection limit of the method is discussed. It is concluded that combined high-voltage ac and low-voltage impedance spectrum tests are ideal means to rule out short circuits in the W7-X coils. |
| | |
Authors:
|
Hartmut Ehmler; Matthias Köppen |
Related Documents
:
|
23173397 - Using root cause analysis and form redesign to reduce incorrect ordering of hiv tests. 17192007 - Neural networks in chemosystematic studies of asteraceae: a classification based on a d... 23538587 - Toward understanding normal craniocervical rotation occurring during the rotation stres... 16326947 - Long-term repeatability makes basal metabolic rate a likely heritable trait in the zebr... 2107777 - Comparison of the complement-fixation and agar gel immunodiffusion tests for diagnosis ... 18337057 - Performance of children on symptom validity tests: tomm, msvt, and fit. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: The Review of scientific instruments Volume: 78 ISSN: 0034-6748 ISO Abbreviation: Rev Sci Instrum Publication Date: 2007 Oct |
Date Detail:
|
Created Date: 2007-11-05 Completed Date: 2008-01-08 Revised Date: 2008-11-21 |
Medline Journal Info:
|
Nlm Unique ID: 0405571 Medline TA: Rev Sci Instrum Country: United States |
Other Details:
|
Languages: eng Pagination: 104705 Citation Subset: IM |
Affiliation:
|
Max-Planck-Institute for Plasma Physics, EURATOM-Association, Wendelsteinstrasse 1, D-17489 Greifswald, Germany. hartmut.edmler@hmi.de |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Computer Simulation Electric Conductivity Electromagnetic Phenomena / instrumentation*, methods Equipment Design Equipment Failure Analysis Models, Theoretical* Nuclear Fusion* Reproducibility of Results Research / instrumentation*, methods Sensitivity and Specificity Spectrum Analysis / methods* Transducers* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Microwave band on-chip coil technique for single electron spin resonance in a quantum dot.
Next Document: Device for characterization of thermal effusivity of liquids using photothermal beam deflection.