Editing Inertial electrostatic confinement (section)

===Polywell===

<!-- Deleted image removed: [[File:Polywell WB-6 complete.jpg|thumb|An example of a polywell's electromagnets]] -->
The polywell uses a magnetic field to trap electrons. When electrons or ions move into a dense field, they can be reflected by the magnetic mirror effect.<ref name="Mirror Systems 1969"/> A polywell is designed to trap electrons in the center, with a dense magnetic field surrounding them.<ref name="Carr, M. 2013"/><ref>"Vlasov–Poisson calculations of electron confinement times in Polywell(TM) devices using a steady-state particle-in-cell method". The DPP13 Meeting of The American Physical Society. Retrieved 2013-10-01.</ref><ref>"Electrostatic potential measurements and point cusp theories applied to a low beta polywell fusion device" PhD Thesis, Matthew Carr, 2013, The University of Sydney</ref> This is typically done using six electromagnets in a box. Each magnet is positioned so their poles face inward, creating a [[null (physics)|null point]] in the center. The electrons trapped in the center form a "virtual electrode"<ref name="bussard">{{cite journal |last1=Bussard |first1=R.W. |year=1991 |title=Some Physics Considerations of Magnetic Inertial-Electrostatic Confinement: A New Concept for Spherical Converging-flow Fusion |journal=Fusion Technology |volume=19 |issue=2 |page=273 |bibcode=1991FuTec..19..273B |doi=10.13182/FST91-A29364}}</ref> Ideally, this electron cloud accelerates ions to fusion conditions.<ref name="ReferenceA"/>