4 papers
Revealing the transient ionization dynamics and mode-coupling mechanisms of helicon discharge through a self-consistent multiphysics model
Jing-Jing Ma, Lei Chang, Ming-Yang Wu +6
Helicon plasma sources play a central role in applications ranging from material treatment to space propulsion and fusion, yet the physical processes governing their ignition, tran…
Plasma fibre using bright-core helicon plasma
Lei Chang, Zi-Chen Kan, Jing-Jing Ma +2
This paper reports an innovative concept of ``plasma fibre" using bright-core helicon plasma, inspired by its spatial and spectral similarities to the well-known optical fibre. The…
Exploration on the Two-stream Instability in the Polar Cusp Under Solar Storm Disturbances and its Potential Impacts on Spacecraft
Jikai Sun, Lei Chang, Yu Liu +6
During solar storms, the polar cusp often exhibits electron populations with distinct velocity distributions, which may be associated with the two-stream instability. This study re…
The bump-on-tail instability excited by energetic electrons in helicon plasma
Shi-Jie Zhang, Dong Jing, Lei Chang +10
This work explores for the first time bump-on-tail (BOT) instability excited by energetic electrons in helicon plasma. The Berk-Breizman model that developed for the wave-particle…