Topica3 user manual, version 0.3
Contents
1. 423045E 00 377412E 00 J 899300E 01 0 0 3 367285E 00 400000E 00 1 266793E 01 0 0 T 3857 397018E 00 400000E 00 ji 344798E 00 0 0 il 3858 394543E 00 400000E 00 i 369684E 00 0 0 2 1 2 2240 2116 2125 1 0 2 2 2 2240 2125 2298 1 0 2 3 2 2856 2985 3184 1 0 2 3631 2 707 627 770 99 0 2 3632 2 1971 1989 2145 99 0 2 5003 2 1138 978 1076 2 0 2 5004 2 978 902 1076 2 0 2 6007 2 3344 3209 3206 21 0 2 6008 2 3209 3153 3148 21 0 2 6009 2 1123 1148 1150 1 0 2 6010 2 1148 1008 1150 1 0 2 6011 2 1016 1150 1008 23 0 2 6012 2 1150 1127 T123 23 0 2 6169 2 2623 2897 2893 1 0 2 6170 2 2893 2897 3257 1 0 3 1 1 26 1 0 0 0 3 2 1 2 1 0 0 0 3 3 1 850 1 0 0 0 3 6604 4907 4908 2 0 0 0 3 6605 4907 5013 2 0 0 0 The first column represents the element type l vertex 2 triangle 3 gt RWG function while the second one is used to number all the elements obviously starting from 1 to the total number of vertices triangles and functions The third fourth and sixth columns of the vertices block stand for the Cartesian coordinates of every vertex in order x y Z Once all vertices are stored the triangle data block starts in this case columns number 3 4 and 5 contain the index of the three vertices of the triangle i e triangle 1 is made up of vertices 2240 2116 and 2125 Column 7 is adopted to identify the role of every triangle 1 means that the triangle has electric currents 2 means that the triangle has both electric and2. plane is positioned in z 0 1 2 distant triangles it express the number of sampling points adopted in the external and internal integral in OPN UW NOB Ws false false false 0 02 0 005 0 0595 0 0 AL WOM DD 0 02 0 005 0 0595 0 0 case of distant triangles Topica3 decides if two triangles are distant or close according to the previous parameter 0 25 and consequently to the working frequency Different formulas are implemented according to the next scheme 1 gt degree 2 3 points 2 gt degree 2 9 points 3 gt degree 5 7 points 4 gt degree 7 16 points 5 degree 1 1 point close triangles coincident triangles coincident close triangles this parameter is used to evaluate if a triangle of the mesh is too large when this happens Topica3 produces some warnings on the output file but matrices are nevertheless computed starting frequency ending frequency frequency points efie this parameter is set to TRUE in case of EFIE set of equations antenna in vacuum and to FALSE when the ibryd formulation is adopted antenna toward plasma coax gt this parameter is set to TRUE when coaxial feeding is adopted while has to be FALSE in case of voltage gap spectral contribution this parameter is set to FALSE only in case of plane aperture toward vacuum the only case in which the module topstc40 has not to run currents this parameter is set to TRUE when we need to sav
3. fsam fin ffin number of samples start and stop frequency Hz respectively ne edge electron density 1 m 3 nD edge deuterium density 1 m 3 nT edge tritium density 1 m 3 nH edge hydrogen density 1 m 3 nHe edge helium density 1 m 3 Bo alpha static magnetic field T and tilt angle deg of Bo with respect to toroidal positive direction kthot radius 1 m of hot plasma spectrum it is actually relevant only if hot plasma is used dmax max distance between cells m plasma flag 1 only compute and save kt and phi for input to FELICE 0 vacuum 1 with plasma FELICE flag 0 cold plasma 1 hot plasma after FELICE output flag 0 compute magnetic magnetic interaction matrix Gp 1 compute power and field spectra e Post4 Post processing program that builds the complete interaction matrix and evaluates the admittance matrix The input files are all the matrices saved by Zem15 Asterione and Topstc40 modules Post4 saves on a file the admittance matrix and if currents parameter see triangoli inp is TRUE also electric and magnetic when EFIE is FALSE currents and electric fields Every module also produces a test file that can be used to check some extra parameters involved in the simulation On Mesh file Here there is a typical example of mesh file after the ReaderM2 module dl 1 427913E 00 400000E 00 1 341234E 01 0 0 T 2
4. input files are the mesh of the antenna generated by ReaderM2 module and the data file df std that contains relevant geometrical and physical parameters that are to be set according to the antenna and plasma models To carry out a complete simulation using a hot plasma model Topstc40 has to be used twice first of all in order to obtain the samples of the spectral variable pairs kt phi which are fed to FELICE code second once FELICE has generated the BrambXX mom output files Topstc40 need be run again to determine the plasma interaction matrix contribution which is eventually saved to files named Gp fX std wherein X is a progressive integer number denoting a frequency point A complete and exhaustive description of the df std input file is contained at the bottom of the same file and reported here Input data description geoname name of file containing the structure description mix msh dcellamax maximum dimension of cell edge normalized to lambdaOmin nt2 number of kt samples in 0 2k0 nfimin minimum number of phi samples in 0 2pi tol tolerance for integrals in 2 k0 kt_max s intersection of aperture with x axis m b intersection of plasma with x axis m b gt s A B R major and minor torus section axes and torus radius m mapping procedure flag 1 stretching is performed 0 no stretching is applied and A B R are ignored
5. magnetic currents 21 36 are used to fix T triangles of every port and 99 corresponds to all T triangles belonging to a port For further details on materials assignment please refer to the first section Finally the last part shows all data referred to RWG functions Column 3 and 4 refers to the index of triangle T and T of the correspondent function i e RWG 1 is made up of triangle T 1 and T 26 while column 5 identifies again the material of an RWG In this case 1 is used for every RWG with electric currents also for RWG belonging to ports while 2 stands for RWG on the aperture of the cavity where both electric and magnetic currents flow All other fields contain parameters that are not taken into account by Topica3 code
6. Topica3 user manual version 0 3 Daniele Milanesio daniele milanesio delen polito it 390115644077 Gid Gid is the graphic tool adopted to draw the antenna First copy the ANTENNA gid folder inside the gid problem types folder second before starting the design of the antenna select the material on the Data window and click over Problem type choosing ANTENNA in order to allow the use of the set of materials on which the code is based If you want to compute electric fields somewhere in the antenna region you need to include in the antenna drawing dedicated surfaces that are used only for this task and on which the magnitude of the electric field will be determined in fact these electric field surfaces are neglected in the analysis and determination of antenna parameters Once the antenna drawing is completed before doing the mesh assign to every surface the correspondent material Antenna for the antenna structure Aperture for its aperture in the case of presence of plasma and Electric Field for dedicated surfaces in case you require the electric field visualization Then according to the feeding you can perform two different operations if the coaxial feeding is included assign to every surface belonging to a coaxial line the correspondent material from Port1 to Port16 and then mesh the structure In case of voltage gap once all the surfaces are described A
7. e currents on RWG functions both magnetic and electric and when we need to compute electric fields number of ports 21 real and imaginary part of voltage and reference impedance at first port always present outer and inner radius of first coax cable all data referring to coax feeding like dimensions or coordinates has to be removed when coax is set to FALSE only voltage values has to be preserved first coax center x coordinate first coax center y coordinate first coax center z coordinate voltage and reference impedance at second port radius of second coax cable second coax center x coordinate second coax center y coordinate second coax center z coordinate In case of more ports all data related to every port has to be added with the same format according to feeding voltage gap or coaxial line The file triangoli inp is an input file for ReaderM2 Asterione Zem15 and Post4 e ReaderM2 It is the first program that has to be run after the creation of the antenna it is used to transform the Gid output geometry file i e structure txt into a complete mesh file i e structure mix msh that will be the input for all the following modules It also produces a file PtX mom for every port assigned e Asterione It computes all self terms electric electric and magnetic magnetic contribution it always saves a Ztem11_fX txt file for every frequency poi
8. nt and when EFIE parameter is set to FALSE antenna toward plasma a Ztem22_fX txt file These two files store the electric and magnetic self interaction between RWG functions In case of electric fields computation it also saves the contribution to the total electric field due to the electric currents on conductors stored in Z11field_fX txt e Zem15 It computes electric magnetic interactions port subdivision and some matrices for coaxial feeding When EFIE is set to TRUE it only determines the port files both in case of voltage gap and coaxial feeding when EFIE is set to FALSE it also saves a Ztem12_ fX txt file for every frequency point If coaxial feeding is set to TRUE it also saves an Ep pX fX txt term for every port at every working frequency that will be used by post processing module In all cases a freq txt file is generated to establish correspondences between every matrix and its working frequency 1 e fl 80 MHz In case of electric fields evaluation this module produce the contribution due to magnetic currents stored in Z12field fX txt and due to the primary currents stored in Epfield_pX_fX txt when the coaxial cable feeding is adopted e Topstc40 This module computes the spectral contribution to the interaction matrix It has to be launched in all cases obviously when EFIE is set to FALSE except when we deal with antennas with plane aperture toward vacuum The necessary
9. ntenna Aperture or Electric Field material mesh the structure Then you need to directly identify the triangles that belong to every port color with the correspondent port material from Portl to Portl6 every T triangle of the RWG function and with Ground material every T triangle If the T triangle belongs to a junction you don t have to care about the T assignment this will be automatically done by Topica3 code We suggest in all cases to use the layer window in order to visualize only some surfaces above all if the antenna is quite complex it is really difficult to find a triangle in a 3D mesh if the entire antenna is visualized When the antenna is completed and the feeding has been identified you can export the mesh in a file i e structure txt that can be read by Topica3 code Brief description of modules e triangoli inp It contains all the input parameters that must be set to properly run the complete Topica3 code all the parameters are described inside the file but they will be analyzed in the following lines This is the content of triangoli inp file Dloop structure name should be coherent with the mesh file from gid 3 integration threshold gt it represent the distance used to distinguish close from distant triangles After several simulations 3 appeared to be the optimum value false ground plane when it is set to TRUE an infinite ground
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