Collisionless Bulk Electron Heating in Resonant Low-Voltage Capacitively Coupled Plasmas
Researchers identify a novel mechanism for electron heating in low-voltage capacitive plasmas, challenging existing models.
A new study published on arXiv details the observation of collisionless power absorption in resonant, low-pressure capacitively coupled plasmas (CCPs).
Despite ultra-low applied RF voltages (a few volts), ions striking electrodes possess kinetic energies significantly higher than the voltage amplitude.
This phenomenon is attributed to a substantial electrostatic potential well within the plasma bulk, which accelerates ions and leads to a distinct mode of collisionless electron heating, differing from conventional stochastic sheath heating.
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