Magnetic Electron LensesP. W. Hawkes |
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Page 177
... values of spherical and / or chromatic aberration that can be ob- tained at a given accelerating voltage and pole - piece material saturation flux density B 4.2.1c Optimizing the Objective Lens with Regard to C and C , S S C The problem ...
... values of spherical and / or chromatic aberration that can be ob- tained at a given accelerating voltage and pole - piece material saturation flux density B 4.2.1c Optimizing the Objective Lens with Regard to C and C , S S C The problem ...
Page 178
... values ( NIU ) min Cs and ( NI / √ ) min Cc ranges . separate the two It is important to realize that the following two factors completely determine the actual values of C and C smin Ccmini 1 ) One pole - piece system shape parameter ...
... values ( NIU ) min Cs and ( NI / √ ) min Cc ranges . separate the two It is important to realize that the following two factors completely determine the actual values of C and C smin Ccmini 1 ) One pole - piece system shape parameter ...
Page 190
... values fp / fp min are multiplied by f absolute values fp f of the projector focal length can be predicted . The P min ' minimum projector focal length f , employed in this context is a function of p min the aspect ratio S / D and as a ...
... values fp / fp min are multiplied by f absolute values fp f of the projector focal length can be predicted . The P min ' minimum projector focal length f , employed in this context is a function of p min the aspect ratio S / D and as a ...
Contents
Magnetic Lens Theory | 1 |
References | 51 |
Magnetic Field Calculation and the Determination of Electron | 57 |
Copyright | |
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aberration coefficients alignment ampere-turns angle aperture applied approximation asymptotic axial flux density bore boundary calculated chromatic aberration conical corresponding cross-section curve cylindrical D₂ diameter electron lens Electron Microscopy electron optical employed equation factor ferromagnetic field strength flange formulae function gap width GLASER half-width integral lens axis lens coil lens core lens current lens design lens field lens strength magnetic circuit magnetic electron magnetic field magnetic flux density magnetic lenses magnetic potential magnetomotive force magnification mesh points method Mulvey objective lens obtained Optik parameters paraxial permanent magnet permanent-magnet permeance Phys piece plane pole pole-piece lens pole-piece system position potential Proc projector focal length projector lens properties quadrupole radial ring rotation rotationally symmetric Ruska saturation Schematic shown single pole-piece solution space spherical aberration spiral distortion stigmator stray field superconducting surface temperature trajectory tube values W.D. Riecke winding