The parametric instability in the inductively coupled plasma driven by the ponderomotive current

The ion-acoustic instability of the inductively coupled plasma driven by the ponderomotive electron current formed in the skin layer

The stability theory of the inductively coupled plasma (ICP) is developed for the case when the electron quiver velocity in RF wave is of the order of or is larger than the electron thermal velocity. The theory predicts the existence the instabilities of the ICP which are driven by the current formed in the skin layer by the accelerated electrons, which move relative ions under the action of the ponderomotive force.

The ion-acoustic turbulence in the skin layer of the inductively coupled plasma

The theory of the nonmodal ion-acoustic instability in the skin layer of the inductively coupled plasma (ICP) is developed. This instability has time dependent growth rate and is driven by the current formed in the skin layer by the accelerated motion of electrons relative to ions under the action of the ponderomotive force. It is found that the development of the ion acoustic turbulence (IAT) in the skin layer and the scattering of electrons by IAT are basic nonlinear channels of the nonlinear absorption of the RF energy in the skin layer.

Parametric upconversion of lower hybrid wave by runaway electrons in tokamak

A kinetic formalism of parametric decay of a large amplitude lower hybrid pump wave into runaway electron mode and a uppersideband mode is investigated. The pump and the sideband exert a ponderomotive force on runaway electrons, driving the runaway mode. The density perturbation associated with the latter beats with the oscillatory velocity due to the pump to produce the sideband. The finite parallel velocity spread of the runaway electrons turns the parametric instability into a stimulated compton scattering process where growth rate scales as the square of the pump amplitude. The large phase…

Parametric study on ion acceleration from the interaction of ultra-high intensity laser pulses with near-critical density gas targets

We present a parametric study based on 1-D particle-in-cell (PIC) simulations conducted with the objective of understanding the interaction of intense lasers with near-critical non-uniform density gas targets. Specifically, we aim to find an optimal set of experimental parameters regarding the interaction of a $λ_L$ = 0.8 $μ$m, $I_L =10^{20}$ W/cm$^2$ ($a_0 = 8.8$), $τ_L = 30$ fs laser pulse with a near-critical non-uniform pure nitrogen gas profile produced by a non commercial gas nozzle. The PIC code Calder developed at CEA was used, and both the maximum electron density and the direct laser…

低β等离子体中波阻尼与有限垂直尺度对三维阿尔芬波参量衰变的影响

Effects of wave damping and finite perpendicular scale on three-dimensional Alfven wave parametric decay in low-beta plasmas

本文首次通过三维开放边界混合模拟研究低β等离子体中动理学阿尔芬波参量衰变不稳定性，揭示波阻尼（碰撞阻尼、几何衰减和离子朗道阻尼）是限制其激发的关键因素，而垂直波尺度本身影响不显著。

磁化电子-正电子对等离子体中的诱导康普顿散射

Induced Compton scattering in magnetized electron and positron pair plasma

本文首次在磁化对等离子体中解析推导了低于回旋频率的诱导康普顿散射增长率，识别出三种密度涨落模式，并揭示回旋半径效应和德拜屏蔽对散射的抑制作用，从而解释了快速射电暴X模式波的100%偏振逃逸现象。