Spiral Instabilities in Semiconductor Plasmas in Transverse Magnetic Fields

抄録

An experimental investigation is made of instabilities in injected plasmas which are found in a Corbino disk shaped semiconductor subject to a radial electric field and an axial magnetic field. Rotating modes of |m|=1 and |m|=2 are observed in such disk of n-type germanium at liquid nitrogen temperature with magnetic fields from 3 to 11 kilogauss.
A preliminary qualitative interpretation is given of the experimental results on the assumption of a spiral shaped perturbation.