Electrostatic Simulation of a medical X-Ray device
Figure 1: Imported geometry of the X-Ray Tube
Figure 1 shows the full geometry imported into CST EMS which consists of an anode and cathode system, a lead shield, and a metallic housing. These components contain a lot of rounded and sharp edges which affect the eletcric field distribition.
The main goal of the simulation is to determine the maximum field strength in the model. The design of the housing for the X-Ray tube can then be optimised to reduce the potential of arcing. Results may be post-processed in terms of field values at specific points, along curves or on material surfaces.
Figure 2: Applied Potential Sources
Figure 2 shows the applied source potentials which include the 0V for the housing and cathode (blue), 90 KV to the anode and anode base(red). The lead ring (green) is set to 45KV.
Figure 3: Contour Plot of the Electric Potential on a central cut-plane through the device
The simulation takes about 4 minutes on a Pentium IV machine and delivers primary quantities such as the electric potential shown in figure 3.
Figure 4: Electric Field Distribution in the X-Ray Device
In addition to the potential, the electric field values can also be plotted in vector form as shown in figure 4. The field was plotted on a central cut-plane using a logarithmic scaling to aid visualisation. Maximum field values in the model may be extracted automatically in the post-processor.
CST Article "Electrostatic Simulation of a medical X-Ray device"
last modified 12. Jan 2009 5:33
printed 10. Feb 2012 6:56, Article ID 116
URL:
All rights reserved.
Without prior written permission of CST, no part of this publication may be
reproduced by any method, be stored or transferred into an electronic data processing system, neither mechanical or by any other method.
Article ID: 116
Last modified: 12. Jan 2009 5:33
Other Articles
New, compact configurations for RF/microwave bandstop and lowpasss filters are presented. Compact footprints are achieved by folding the transmission lines in a microstrip platform. The effect of mutual coupling between the transmission lines, curved line sections, interconnecting lengths of the sections are taken into account to obtain the network parameters for the folded line filters. The folded line filters have practical dimensions for a wide range of electrical specifications, making physical implementation realizable. The filter designs have been validated by using full wave 3D EM simulation using CST MICROWAVE STUDIO®, as well as by comparison with the measurements. The new designs presented should prove useful for a host of embedded passive and RFIC applications in the 1-10 GHz range.
Read full article..
This huge Pillbox Antenna was optimised by one of our customers even during the evaluation period of CST MICROWAVE STUDIO
Read full article..
This paper presents the excellent correlation of measurement results to the numerical calculations of a SATIMO dual-ridge horn antenna which include the directivity, boresight gain, and return loss vs. frequency. The structure is electrically large which lends itself, as a result of its efficient memory utilisation, to the CST MICROWAVE STUDIO® (CST MWS) Time Domain Solver. Broadband, high resolution gain results can be obtained within a single run with as many as 100 farfield monitors being defined.
The results are presented with the courtesy and permission of SATIMO, Italy.
Read full article..
The 3rd Dimension: This inductive, mostly planar structure contains an air bridge.
Read full article..
The combination of non-linear materials and eddy currents leads to a problem which cannot be solved with a steady-state eddy current solver. A transient solver is required and and inherently includes the feature that arbitrary time signals can be used for the excitation.
The CST EM STUDIO® (CST EMS) transient solver allows such a simulation to be carried out. In this case, a Gas insulated Bus under short circuit conditions is investigated. The forces and losses on the bus bars can be calculated as a function of time.
Read full article..