Understanding the Alfvén Engine

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An Alfvén engine utilizes magnetic interactions between celestial bodies, particularly in the context of interstellar magnetic fields. It is based on the concept of Alfvén waves, which are oscillations in plasma that can transfer energy. Research dating back to 1965 discusses the potential of such systems to generate electric power through these magnetic interactions. Notably, the interaction between Jupiter and its moon Io exemplifies a natural Alfvén engine. This concept extends beyond science fiction, with practical implications in astrophysics and energy generation.
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Can anyone here explain to me the concept of an Alfvén engine?

I heard about it sometime ago in a science fiction book and I have found little on the internet regarding it except enough for me to know it has something to do with interstellar magnetic fields (hence why I am posting here instead of in the astrophysics section).

Thank you.
 
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Vorde, Alfven engines are more than science fiction!

There is a magnetic interaction between our planet and a satellite in orbiting in the ionosphere. It was described almost 50 years ago in:

The American Geophysical Union, JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 70, NO. 13, PP. 3131-3145, 1965

http://www.agu.org/pubs/crossref/1965/JZ070i013p03131.shtml

The authors show how the system could be used to generate electric power.

If you use GOOGLE “Alfven engine” you will find Jupiter and its moon Io create an “Alfven engine”, plus lots more. Good reading!
 

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