Abstract
The density and geometry of p¯ and e+ plasmas in realistic trapping potentials are required to understand and optimize antihydrogen (H¯) formation. An aperture method and a quadrupole oscillation frequency method for characterizing such plasmas are compared for the first time, using electrons in a cylindrical Penning trap. Both methods are used in a way that makes it unnecessary to assume that the plasmas are spheroidal, and it is shown that they are not. Good agreement between the two methods illustrates the possibility to accurately determine plasma densities and geometries within non-idealized, realistic trapping potentials.
Highlights
The density and geometry of pand e+ plasmas in realistic trapping potentials are required to understand and optimize antihydrogen (H )
In this Letter two very different methods to determine the density and spatial profile of single component plasmas are compared for the first time
We use both methods in an extended form that avoids relying upon the simplifying assumption that the plasmas have a spheroidal shape, an assumption that is valid only when the single component plasma is located within a pure electrostatic quadrupole
Summary
The density and geometry of pand e+ plasmas in realistic trapping potentials are required to understand and optimize antihydrogen (H ). In this Letter two very different methods to determine the density and spatial profile of single component plasmas are compared for the first time.
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