Abstract
Computer Aided Designing Tools of Electron Lenses (CADTEL) is a software packages cares about design, compute and plot simultaneously of the objective and projector properties of electron magnetic lenses. The developments in CADTEL software leads to contain a large fields and methods, adding to previous publish in 2013. The current improvement is inserting of some important parameters which are the resolution and focusing parameters. These parameters are angular semi-angle (α), focusing power (β), resolution limit (δ), image rotation (θ), spherical aberration (Cs), defocus (ΔZ), wave aberration (Χwab), depth of field (Dfld), and depth of focus (Dfoc) at certain magnification conditions. Thus, user can easily compute and plot, according to relations and forms, the effect of these parameters at the lens properties of four magnification conditions; zero, infinite and finite (low and high) magnification modes. This work introduces a new development for CADTEL software which is an interactive visual interface in electromagnetic lenses.Whereas, it reflects a substantial reduction of time and resources desired for training new users and researchers in electron optics field. The results and curves representations appear with visual interfaces which are coded in visual basic programing language. In addition, the computations and figures which were plotted appeared that complete identification between these results which are obtained from CADTEL and that from other software’s and direct computations methods.
Highlights
Computer Aided Designing Tools of Electron Lenses (CADTEL) software was introduced by Hasan in 2013 for electromagnetic lenses
Numerous software and simulation programs interested in charged particle optics have been reported such as: G-optk program proposed for object-image analysis mode with intersting capability which was demonstrated by applying this program for three systems of electron optics, the most imported one is a lowenergy electron microscopy objective lens [2]; The Electron Optical Design (EOD) software which is a complete workplace for the design of electron and ion microscopes [3]; Charged particle optics (CPO) program which is concerned with imaging and electron physics, optical and electron microscopy, physics of electron devices, particle optics at high and low energies, electron microscopy where the computing methods are used in all these domains [4]; there is VDTEL software which is a visual designing tool for electrostatic lenses [5]. 2
Case Study The current paper aims to build and develop a new software CADTEL that can be used to design, compute and plot the resolution and focusing parameters affecting the properties of electron magnetic lenses
Summary
CADTEL software was introduced by Hasan in 2013 for electromagnetic lenses. It includes both analysis procedure and synthesis procedure.[1]. Inverse Tangent Function model, takes no. in software and many more., The mathematical model of the magnetic field function is used to determine the path of the electron beam as well as determining the distribution of the scalar potential along the supposed optical axis as a starting point in determining the optimal design of the magnetic lens. Zero magnification condition required operating state of the charged particle beam enters the electron lens field parallel to the optical axis, i.e. the object position is at infinity. While infinite magnification condition, required for the operating condition in this case, is that the image position is at infinity, i.e. the beam emerges from the electron lens field parallel to the optical axis.
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