Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.00 vteřin. 
Ray tracing, aberration coefficients and intensity distribution
Oral, Martin
In particle optics paraxial ray tracing (solution of the paraxial trajectory equation) provides the basic imaging properties of an optical system and real ray tracing (solution of the equation of motion with time as the parameter) gives the complete particle paths including all aberrations. While there are methods of computing the aberration coefficients directly, for example by evaluating the aberration integrals, ray tracing can also be used for this purpose.
Recent developments and improvements of EOD program
Lencová, Bohumila
EOD is used for computations in particle optics that require accurate determination of 2D electrostatic and magnetic focusing, deflection and multipole fields and accurate evaluation of optical properties from aberration theory or from ray tracing. EOD not only allows these types of computations, but it is a complete workplace equipped with a user interface for editing input data for FEM, computation of paraxial trajectories and aberrations and ray-tracing, running the computations, producing graphical outputs and processing them. Extensive documentation on more than 500 pages gives both the user manual, theory behind FEM, optics and ray tracing and basic description of examples. The easy start in using the program is enabled by a series of PowerPoint presentations and a number of videos, showing the work with EOD on both simple and difficult examples. More than 30 projects with sample data allow the user to understand the work with EOD.
Numerické výpočty termoemisních elektronových trysek
Jánský, Pavel ; Lencová, Bohumila ; Zlámal, J.
Článek popisuje výsledky numerických simulací termoemisní elektronové trysky s vlásenkovou katodu určené pro svařování a mikroobrábění elektronovým svazkem. Uvádí příklady vypočtených profilů proudové hustoty a jejich srovnání s měřením.

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