1 | <!-- ******************************************************** --> |
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2 | <!-- Docbook Version: For Toolkit Developers Guide --> |
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3 | <!-- ******************************************************** --> |
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4 | |
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5 | <!-- ******************* Section (Level#1) ****************** --> |
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6 | <sect1 id="sect.DsgnFuncMateri"> |
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7 | <title> |
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8 | Materials |
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9 | </title> |
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10 | |
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11 | |
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12 | <!-- ******************* Section (Level#2) ****************** --> |
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13 | <sect2 id="sect.DsgnFuncMateri.DsgPhlsp"> |
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14 | <title> |
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15 | Design Philosophy |
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16 | </title> |
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17 | |
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18 | <para> |
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19 | The design of the materials category reflects what exists in nature: materials |
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20 | are made of a single element or a mixture of elements, and elements are made |
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21 | of a single isotope or a mixture of isotopes. Because the physical |
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22 | properties of materials can be described in a generic way by quantities which |
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23 | can be specified directly, such as density, or derived from the element |
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24 | composition, only concrete classes are necessary in this category. |
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25 | </para> |
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26 | |
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27 | <para> |
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28 | The material category implements the facilities necessary to describe the |
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29 | physical properties of materials for the simulation of particle-matter |
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30 | interactions. Characteristics like radiation and interaction length, |
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31 | excitation energy loss, coefficients in the Bethe-Bloch formula, shell |
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32 | correction factors, etc., are computed from the element, and if necessary, |
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33 | the isotope composition. |
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34 | </para> |
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35 | |
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36 | <para> |
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37 | The material category also implements facilities to describe surface |
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38 | properties used in the tracking of optical photons. |
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39 | </para> |
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40 | |
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41 | </sect2> |
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42 | |
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43 | <!-- ******************* Section (Level#2) ****************** --> |
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44 | <sect2 id="sect.DsgnFuncMateri.ClassDsg"> |
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45 | <title> |
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46 | Class Design |
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47 | </title> |
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48 | |
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49 | <para> |
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50 | The object-oriented design of the 'materials' related classes |
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51 | is shown in the class diagram: |
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52 | <xref linkend="fig.DsgnFuncMateri_1" />. |
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53 | The diagram is described in the Booch notation. |
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54 | |
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55 | <figure id="fig.DsgnFuncMateri_1"> |
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56 | <title> |
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57 | </title> |
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58 | <mediaobject> |
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59 | <imageobject role="fo"> |
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60 | <imagedata fileref="./AllResources/OOAnalysisDesign/Materials/classDgmMaterials.jpg" |
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61 | format="JPG" contentwidth="10.0cm" align="center" /> |
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62 | </imageobject> |
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63 | <imageobject role="html"> |
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64 | <imagedata fileref="./AllResources/OOAnalysisDesign/Materials/classDgmMaterials.jpg" |
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65 | format="JPG" align="center" /> |
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66 | </imageobject> |
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67 | </mediaobject> |
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68 | </figure> |
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69 | </para> |
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70 | |
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71 | |
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72 | <!-- ******* Bridgehead ******* --> |
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73 | <bridgehead role="revisionHistory" renderas="sect4"> |
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74 | [Status of this chapter] |
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75 | </bridgehead> |
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76 | <para> |
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77 | <simplelist type="var"> |
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78 | <member> |
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79 | 27.06.05 section on design philosophy add (from Geant4 general paper) by |
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80 | D.H. Wright |
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81 | </member> |
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82 | <member> |
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83 | Dec. 2006 Conversion from latex to Docbook verson by K. Amako |
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84 | </member> |
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85 | </simplelist> |
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86 | </para> |
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87 | |
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88 | |
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89 | </sect2> |
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90 | </sect1> |
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91 | |
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92 | |
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