Propagation of energetic electrons in a hollow plasma fiber

Zhou, C. T.; Chew, L. Y.; He, X. T.
August 2010
Applied Physics Letters;8/2/2010, Vol. 97 Issue 5, p051502
Academic Journal
Transport of energetic electrons in a hollow plasma fiber is investigated. The high-current electron beam induces in the fiber strong radial electric fields and azimuthal magnetic fields on the inner and outer surfaces of the hollow fiber. The hot electrons are pushed out by the surface magnetic field and returned into the fiber by the sheath electric field. Imbalance of the latter fields can drive chaotic oscillations of electrons around the fiber wall. Intense thin return-current layers inside both the inner and outer wall surfaces are observed. This enhances local joule heating around both surfaces by the return current.


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