New Methods to Look at an Old Technology: Innovations to Diagnose Thermal Plasmas

The use and development of diagnostics for thermal plasmas is motivated by the industrial importance of thermal plasma applications like welding, cutting or thermal spraying. While the physical fundamentals of plasma diagnostics were introduced decades ago new technologies allow to perform a more de...

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Bibliographic Details
Published in:Plasma chemistry and plasma processing 2015-05, Vol.35 (3), p.437-453
Main Authors: Schein, J., Hartz-Behrend, K., Kirner, S., Kühn-Kauffeldt, M., Bachmann, B., Siewert, E.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Classical Mechanics
Current density
Cutting
Diagnostic software
Inorganic Chemistry
Mechanical Engineering
Original Paper
Plasma diagnostics
Plasma radiation
Product innovation
Thermal plasmas
Welding
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Summary:The use and development of diagnostics for thermal plasmas is motivated by the industrial importance of thermal plasma applications like welding, cutting or thermal spraying. While the physical fundamentals of plasma diagnostics were introduced decades ago new technologies allow to perform a more detailed analysis of the mentioned applications with increased spatial and temporal resolution, enabling the investigation of complex processes thereby moving the focus from pure plasma to plasma-material diagnostics. An attempt is made to demonstrate current and future possibilities provided by technical progress using “old physics” with the help of few examples. The examples introduced here focus mostly on welding applications and include the use of high-speed cameras for the spectrally resolved analysis of plasma radiation and two-color pyrometry. In addition the use of Thomson scattering in gas metal arc welding is proposed as well as the use of magnetic field measurements for non-intrusive current density measurements.
ISSN:0272-4324
1572-8986
DOI:10.1007/s11090-014-9604-7