Abstract
An external method is proposed for measuring the pressure anisotropy in a mirror-confined plasma. From a theory based on the adiabatic motion of particles the authors derive the variation of characteristic plasma parameters along the axis of a magnetic bottle. The calculations are made with several angular distribution functions and show the dependence on the pressure anisotropy A=p/sub ////pperpendicular to . Conversely, it is possible to deduce A if the longitudinal variation of a plasma parameter is known. As an example, the measurement of the diamagnetic profile of a hot electron plasma with a set of magnetic loops allows a quantitative determination of the plasma pressure anisotropy. The method also permits the time variation of A in both stable and unstable regimes to be measured.
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