A new class of electrostatic energy analysers with a bounded cylindrical focusing field is presented. The focusing field used is a solution of a Laplace equation ∇2U(R, Z) = 0 with boundary conditions U(R1, Z) = U(R, 0) = U(R, L) = 0 and U(R2, Z) = V, and restricted by concentric cylindrical surfaces and two flat surfaces perpendicular to the axis of symmetry. A charged particle beam enters the field through a face window in a flat boundary electrode. Regimes of second-order focusing have been found for configurations with a point source, located on the axis of symmetry and for an extended source of large angular size. In particular, the new analysers can be used for electron spectroscopy of distant surfaces or surfaces with large roughness or even with deep dimples. These instruments in principle have no perceptible end-fields, which usually distort focusing in most of the analysers known. The design of a compact analyser for remote Auger electron spectroscopy and some experimental results, showing the capability of using these instruments for scientific and technological applications, are given.
= R 2 /R 1 were found and energy function shape and energy resolution ability were calculated. Combination of high energy resolution ability with high transmission and simple design makes this instrument very promising for a wide area of scientific and technological applications, in particular, for space plasma measurements.
The paper presents results of numerical calculations of a high-resolving electrostatic energy analyzer, based on a bounded cylindrical field, for investigations of flows of charged particles in space. The analyzer possesses with ability of fine tuning of focusing characteristics, using an additional tuning potential, applied to one of electrodes. A combination of high energy resolution ability with high transmission, simple design and compactness makes this instrument very promising for space technologies.
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