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Updated: Aug 18, 2025
11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
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Observation of prior light emission before arcing development in a low-temperature plasma with multiple snapshot
Si-Jun Kim1, Young-Seok Lee1, Chul-Hee Cho1
1Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon, 34134, Republic of Korea.
Scientific Reports
|December 5, 2022
Summary
Early light emission precedes arcing in low-temperature plasma (LTP) systems. This discovery, observed using an arcing inducing probe (AIP), offers a new method for predicting damaging arcing events in LTP engineering.
Area of Science:
- Plasma Physics
- High-Voltage Engineering
- Materials Science
Background:
- Arcing is a critical issue in high-voltage systems, particularly in low-temperature plasma (LTP) engineering.
- The underlying mechanisms of arcing in LTPs remain incompletely understood despite its potential for severe damage.
Purpose of the Study:
- To elucidate the arcing mechanism in LTPs.
- To identify early indicators for forecasting arcing events.
Main Methods:
- Investigated conventional arcing analysis signals: light emission, current, voltage, and plasma potential.
- Utilized an arcing inducing probe (AIP) for localized arcing and employed multiple snapshot analysis.
- Analyzed pre-arcing light emissions, including sheath and tip glows.
Main Results:
- Observed light emission occurring as early as 0.56 μs before arcing current initiation.
- Identified distinct sheath and tip glows as precursors to arcing.
- Demonstrated that light emission is a significant indicator of explosive arcing development.
Conclusions:
- Pre-arcing light emission provides crucial insights into arcing formation mechanisms in LTPs.
- This early light emission serves as a novel indicator for forecasting arcing events.
- The findings contribute to a better understanding and mitigation of arcing in high-voltage applications.
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