What is it about?
In this work, we derive a theory that electromagnetic radiation at curved plasma boundaries can be spontaneously emitted. This radiation happens due to thermal waves that oscillate on the surface of the plasma. This theory is then compared to computational simulations and shows good agreement. We then discuss why this radiation occurs on curved plasma boundaries and not straight ones.
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Why is it important?
Radiation from curved plasma boundaries has been studied in other contexts. For instance, it has been studied in magnetic plasmas, or laser-plasma interactions. However, for the first time, we show that radiation can be spontaneously emitted and not due to interactions with external forces. This is particularly important for plasmas that are formed through meteoroid impacts on spacecraft, which have been observed to spontaneously emit radiation.
Read the Original
This page is a summary of: A curvature-based mechanism for the spontaneous emission of electromagnetic radiation at curved plasma–vacuum interfaces, Physics of Plasmas, January 2025, American Institute of Physics,
DOI: 10.1063/5.0250191.
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