Low Frequency Oscillations of Plasma Injected in Open Magnetic Trap from Independent Ultra-high Frequency Source

TL;DR

This paper investigates a novel method of filling open magnetic traps with plasma using an external UHF source in ECR conditions and studies the resulting low frequency plasma oscillations.

Contribution

It introduces a new plasma injection technique using an independent UHF source in ECR regime for open magnetic traps.

Findings

Efficient plasma filling achieved in the trap.

Observation of low frequency plasma oscillations.

Analysis of plasma behavior in nonuniform magnetic fields.

Abstract

Methods of plasma heating by electromagnetic waves, interaction of electro-magnetic waves with magnetoactive plasma, plasma turbulence and transport processes are investigated in the trap of the linear plasma device OMT2. An ultrahigh frequency (UHF) contactless method is used to fill the open magnetic trap by plasma. We propose a new method of open magnetic trap filling with plasma whereby plasma is injected in the trap along the magnetic field from an independent stationary UHF source. The source is located outside the trap and plasma formation in it takes place in the strongly nonuniform magnetic field, in the electron cyclotron resonance (ECR) regime by means of the UHF power. In this paper we study the efficiency of open magnetic trap filling by plasma and plasma low frequency (LF) oscillations in the trap.