{"id":534022,"date":"2022-09-19T12:08:37","date_gmt":"2022-09-19T16:08:37","guid":{"rendered":"https:\/\/www.rochester.edu\/newscenter\/?p=534022"},"modified":"2022-09-20T08:34:01","modified_gmt":"2022-09-20T12:34:01","slug":"how-do-magnetic-fields-affect-star-formation-plasma-instabilities-534022","status":"publish","type":"post","link":"https:\/\/www.rochester.edu\/newscenter\/how-do-magnetic-fields-affect-star-formation-plasma-instabilities-534022\/","title":{"rendered":"How do magnetic fields affect star formation and high-energy-density lab experiments?"},"content":{"rendered":"

Rochester researchers hope to explain how the fields occur in plasma instabilities.<\/h2>\n

The famous Pillars of Creation in the Eagle Nebulae\u2014a star nursery\u2014are believed to result from the hydrodynamic instabilities that form when plasmas are exposed to high intensity light from neighboring stars.<\/p>\n

Something very similar occurs\u2014at a minute scale\u2014when materials are imploded by converging laser beams during high-energy-density physics and fusion experiments at the Laboratory for Laser Energetics<\/a> at the University of Rochester<\/a>.<\/p>\n

\u201cYou shine the lasers, you evaporate mass off of the surface, and push everything radially inwards, and you have these hydrodynamic instabilities that have modulations similar to the Pillars,\u201d says Hussein Aluie<\/a>, associate professor of mechanical engineering at Rochester\u2019s Hajim School of Engineering & Applied Sciences<\/a>.<\/p>\n

To what extent do plasmas undergoing instabilities generate magnetic fields, and how do those magnetic fields further influence the plasma instabilities? \u201cIt is well known that magnetic fields can strongly impact how plasmas behave,\u201d Aluie says, \u201cbut the mechanisms for self-generation and amplification of magnetic fields in different types of plasma continue to be a mystery.\u201d<\/p>\n

With funding from a $390,000 National Science Foundation grant<\/a>, Aluie will address this mystery with co-PI Riccardo Betti,<\/a> LLE\u2019s chief scientist and Robert L. McCrory Professor, and Fernando Garcia-Rubio, assistant scientist at the LLE and in Aluie\u2019s Turbulence and Complex Flow Group<\/a>, who has been developing the theory for this work. The goal is to identify the main mechanisms by which magnetic fields are self-generated in irradiated plasmas subject to instabilities. The work will involve theoretical analysis and numerical simulations.<\/p>\n

\u201cBased on previous research that we and others have done, and hope to develop in more depth, we know that these magnetic fields, even if they are initially small in strength, grow quickly,\u201d Aluie says.<\/p>\n

\u201cThey affect the way heat moves around the surface of the plasma and evaporates mass, which alters the way the instability forms. And in the case of fusion experiments, it alters the way the target becomes unstable.\u201d<\/p>\n

A better understanding of this process could help scientists move closer to achieving fusion as a source of unlimited energy and a better understanding of the formation of nebulae and other astrophysical bodies, Aluie says.<\/p>\n

\n

Read more<\/strong><\/h3>\n
\n
\"illustrationRochester leads efforts to understand matter at atom-crushing pressures<\/strong><\/a>
\nThe University is the host institution for NSF-funded national collaboration to explore \u2018revolutionary states of matter.\u2019<\/span><\/div>\n
\"outdoorConstruction begins on new Laser Lab expansion<\/strong><\/a>
\nThe University of Rochester\u2019s Laboratory for Laser Energetics has broken ground on a new $42 million, 66,000-square-foot expansion to house office and lab space.<\/span><\/div>\n
\"ResearchersFlash Center moves to Rochester, advances cutting-edge physics research<\/strong><\/a>
\nThe Flash Center\u2014devoted to computer simulations to advance understanding of astrophysics, plasma science, high-energy-density physics, and fusion energy\u2014has moved from the University of Chicago to Rochester.<\/span><\/div>\n<\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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