Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Influence of saddle deflection coils inaccuracy on image aberrations
Mičulka, Martin ; Oral, Martin (oponent) ; Sháněl, Ondřej (vedoucí práce)
This thesis deals with computing of parasitic magnetic fields of the misaligned deflection coil due to the manufacturing imperfections. The relation between the multipole magnetic fields and the asymmetric winding distribution of an electron deflection system is discussed. Novel and fast 2D methods of calculation are introduced. The results are then compared with the 3D final elements method as well as with an experiment. Consequently, the influence of the parasitic multipole fields due to the manufacturing imperfections on astigmatism is examined.
Influence of saddle deflection coils inaccuracy on image aberrations
Mičulka, Martin ; Oral, Martin (oponent) ; Sháněl, Ondřej (vedoucí práce)
This thesis deals with computing of parasitic magnetic fields of the misaligned deflection coil due to the manufacturing imperfections. The relation between the multipole magnetic fields and the asymmetric winding distribution of an electron deflection system is discussed. Novel and fast 2D methods of calculation are introduced. The results are then compared with the 3D final elements method as well as with an experiment. Consequently, the influence of the parasitic multipole fields due to the manufacturing imperfections on astigmatism is examined.

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