VINETA II: a linear magnetic reconnection experiment

Area of Science:

• Plasma Physics
• Astrophysics
• Space Physics

Background:

• Magnetic reconnection is a fundamental plasma process responsible for phenomena like solar flares and geomagnetic storms.
• Understanding driven magnetic reconnection is crucial for controlling fusion energy devices and interpreting astrophysical observations.
• Previous experimental studies often faced limitations in controlling reconnection parameters or plasma regimes.

Purpose of the Study:

• To present VINETA II, a novel linear experimental device for studying driven magnetic reconnection.
• To investigate both collisional and near collisionless regimes of magnetic reconnection.
• To explore two distinct methods for driving magnetic reconnection and their effects on plasma topology.

Main Methods:

• Utilizing a linear experimental device (VINETA II) with an open field line configuration.
• Employing two methods for driving magnetic reconnection: oscillating current through parallel conductors and a stationary X-point with an oscillating third conductor.
• Using a plasma gun as an additional electron source to manage charge separation and supply plasma current.

Main Results:

• The first drive method showed the axial plasma current's magnetic field dominating the X-point topology.
• The second drive method enabled independent control over plasma current amplitude and flux motion relative to the X-point.
• The device successfully facilitates the study of reconnection dynamics under varying collisionality and drive configurations.

Conclusions:

• VINETA II provides a versatile platform for fundamental research in driven magnetic reconnection.
• The experimental setups allow for detailed investigation of plasma current effects and flux dynamics during reconnection.
• This research contributes to a deeper understanding of magnetic reconnection relevant to both laboratory and astrophysical plasmas.