Jets and outflows are thought to be an integral part of accretion phenomena and are associated with a large variety of objects. In these systems, the interaction of magnetic fields with an accretion disk and/or a magnetized central object is thought to be responsible for the acceleration and collimation of plasma into jets and wider angle flows. In this paper we present three-dimensional MHD simulations of magnetically driven, radiatively cooled laboratory jets that are produced on the MAGPIE experimental facility. The general outflow structure comprises an expanding magnetic cavity which is collimated by the pressure of an extended plasma background medium, and a magnetically confined jet which develops within the magnetic cavity. Although this structure is intrinsically transient and instabilities in the jet and disruption of the magnetic cavity ultimately lead to its break-up, a well collimated, "knotty" jet still emerges from the system; such clumpy morphology is reminiscent of that observed in many astrophysical jets. The possible introduction in the experiments of angular momentum and axial magnetic field will also be discussed.
|Original language||English (US)|
|Number of pages||6|
|Journal||Astrophysics and Space Science|
|State||Published - Jan 2007|
Bibliographical noteFunding Information:
Acknowledgements The present work was supported in part by the European Community’s Marie Curie Actions – Human Resource and Mobility within the JETSET network under contract MRTN-CT-2004 005592. The authors also wish to acknowledge the SFI/HEA Irish Centre for High-End Computing (ICHEC) and the London e-Science Centre (LESC) for the provision of computational facilities and support.
- Accretion discs
- Jets and outflows
- Laboratory astrophysics
- MHD plasmas
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science