Plasma Bubbles Help Trigger Massive Magnetic Events in Outer Space
By incorporating computer simulations, the findings add to an earlier theory of fast reconnection developed mathematically by physicists at PPPL and Princeton University. The new results incorporate a new predictive model that gives a more complete description of the physics involved.
The impact of reconnection can be felt throughout the universe. The process may cause enormous bursts of gamma-ray radiation thought to be associated with supernova explosions and the formation of ultra-dense neutron stars and black holes. “A gamma-ray burst in our Milky Way galaxy, if pointing towards Earth, could potentially cause a mass extinction event,” said PPPL physicist Yi-Min Huang, lead author of a paper reporting the findings in Astrophysical Journal. “Clearly, it is important to know when, how, and why magnetic reconnection takes place.”
PPPL physicist Yi-Min Huang
Credit: Elle Starkman / Office of Communications
Using computer simulations and theoretical analysis, the physicists demonstrated that a phenomenon called the “plasmoid instability” creates bubbles within plasma that can lead to reconnection when certain conditions are met:
- The plasma must have a high Lundquist number, which characterizes how well it conducts electricity.
- Random fluctuations in the magnetic field of the plasma provide “seeds” from which the plasma instability grows.
Taken together, these conditions allow plasmoid instabilities to give rise to reconnection in current sheets. “Our study suggests that disruption of the current sheet caused by the plasmoid instability may provide a trigger,” Huang said.
The trigger breaks up two-dimensional sheets of electric current within plasma into bubbles, or plasmoids, and many smaller sheets. The growing number of sheets creates more opportunity for magnetic lines to break apart and join together. Reconnection also occurs in more than one place, causing the aggregate rate for an entire system to increase.
The smaller size of current sheets speeds up reconnection as well. Electromagnetic forces tend to propel the plasma between sheets, producing motion that accelerates when the sheets break into smaller ones. The accelerating plasma brings magnetic lines together more quickly and leads to faster reconnection rates.
Huang and fellow physicists would like to test their new model using experimental machines with additional capability. While no such machine exists at present, researchers look forward to a new unit that is coming online.
Funding for this research was provided by the National Science Foundation and the DOE (Fusion Energy Sciences). The simulations were performed by supercomputers at the Oak Ridge Leadership Computing Facility and the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility at Lawrence Berkeley National Laboratory in Berkeley, California. Coauthors include Amitava Bhattacharjee, head of the Theory Department at PPPL, and Luca Comisso, a former PPPL and Princeton University physicist now at Columbia University.
Source:
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Please Help Support BeforeitsNews by trying our Natural Health Products below!
Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST
Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!
HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation.
Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.
MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser! Cleans out toxic buildup with oxygen!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover - Reduces Smart Meter radiation by 96%! (See Video).