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50 | <h1>Source code for sas.calculator.kiessig_calculator</h1><div class="highlight"><pre> |
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51 | <span class="sd">"""</span> |
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52 | <span class="sd">This module is a small tool to allow user to quickly</span> |
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53 | <span class="sd">determine the size value in real space from the</span> |
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54 | <span class="sd">fringe width in q space.</span> |
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55 | <span class="sd">"""</span> |
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56 | <span class="kn">from</span> <span class="nn">math</span> <span class="kn">import</span> <span class="n">pi</span><span class="p">,</span> <span class="n">fabs</span> |
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57 | <span class="n">_DQ_DEFAULT</span> <span class="o">=</span> <span class="mf">0.05</span> |
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58 | |
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59 | |
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60 | <div class="viewcode-block" id="KiessigThicknessCalculator"><a class="viewcode-back" href="../../../dev/api/sas.calculator.html#sas.calculator.kiessig_calculator.KiessigThicknessCalculator">[docs]</a><span class="k">class</span> <span class="nc">KiessigThicknessCalculator</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
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61 | <span class="sd">"""</span> |
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62 | <span class="sd"> compute thickness from the fringe width of data</span> |
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63 | <span class="sd"> """</span> |
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64 | <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
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65 | |
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66 | <span class="c"># dq value</span> |
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67 | <span class="bp">self</span><span class="o">.</span><span class="n">deltaq</span> <span class="o">=</span> <span class="n">_DQ_DEFAULT</span> |
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68 | <span class="c"># thickenss value</span> |
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69 | <span class="bp">self</span><span class="o">.</span><span class="n">thickness</span> <span class="o">=</span> <span class="bp">None</span> |
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70 | <span class="c"># unit of the thickness</span> |
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71 | <span class="bp">self</span><span class="o">.</span><span class="n">thickness_unit</span> <span class="o">=</span> <span class="s">'A'</span> |
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72 | |
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73 | <div class="viewcode-block" id="KiessigThicknessCalculator.set_deltaq"><a class="viewcode-back" href="../../../dev/api/sas.calculator.html#sas.calculator.kiessig_calculator.KiessigThicknessCalculator.set_deltaq">[docs]</a> <span class="k">def</span> <span class="nf">set_deltaq</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dq</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span> |
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74 | <span class="sd">"""</span> |
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75 | <span class="sd"> Receive deltaQ value</span> |
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76 | <span class="sd"> </span> |
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77 | <span class="sd"> :param dq: q fringe width in 1/A unit</span> |
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78 | <span class="sd"> """</span> |
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79 | <span class="c"># set dq</span> |
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80 | <span class="bp">self</span><span class="o">.</span><span class="n">deltaq</span> <span class="o">=</span> <span class="n">dq</span> |
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81 | </div> |
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82 | <div class="viewcode-block" id="KiessigThicknessCalculator.get_deltaq"><a class="viewcode-back" href="../../../dev/api/sas.calculator.html#sas.calculator.kiessig_calculator.KiessigThicknessCalculator.get_deltaq">[docs]</a> <span class="k">def</span> <span class="nf">get_deltaq</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
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83 | <span class="sd">"""</span> |
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84 | <span class="sd"> return deltaQ value in 1/A unit</span> |
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85 | <span class="sd"> """</span> |
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86 | <span class="c"># return dq</span> |
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87 | <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">deltaq</span> |
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88 | </div> |
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89 | <div class="viewcode-block" id="KiessigThicknessCalculator.compute_thickness"><a class="viewcode-back" href="../../../dev/api/sas.calculator.html#sas.calculator.kiessig_calculator.KiessigThicknessCalculator.compute_thickness">[docs]</a> <span class="k">def</span> <span class="nf">compute_thickness</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
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90 | <span class="sd">"""</span> |
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91 | <span class="sd"> Calculate thickness.</span> |
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92 | <span class="sd"> </span> |
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93 | <span class="sd"> :return: the thickness.</span> |
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94 | <span class="sd"> """</span> |
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95 | <span class="c"># check if it is float</span> |
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96 | <span class="k">try</span><span class="p">:</span> |
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97 | <span class="n">dq</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">deltaq</span><span class="p">)</span> |
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98 | <span class="k">except</span><span class="p">:</span> |
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99 | <span class="k">return</span> <span class="bp">None</span> |
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100 | <span class="c"># check if delta_q is zero</span> |
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101 | <span class="k">if</span> <span class="n">dq</span> <span class="o">==</span> <span class="mf">0.0</span> <span class="ow">or</span> <span class="n">dq</span> <span class="o">==</span> <span class="bp">None</span><span class="p">:</span> |
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102 | <span class="k">return</span> <span class="bp">None</span> |
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103 | <span class="k">else</span><span class="p">:</span> |
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104 | <span class="c"># calculate thickness</span> |
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105 | <span class="n">thickness</span> <span class="o">=</span> <span class="mi">2</span><span class="o">*</span><span class="n">pi</span><span class="o">/</span><span class="n">fabs</span><span class="p">(</span><span class="n">dq</span><span class="p">)</span> |
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106 | <span class="c"># return thickness value</span> |
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107 | <span class="k">return</span> <span class="n">thickness</span> |
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108 | </div> |
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109 | <div class="viewcode-block" id="KiessigThicknessCalculator.get_thickness_unit"><a class="viewcode-back" href="../../../dev/api/sas.calculator.html#sas.calculator.kiessig_calculator.KiessigThicknessCalculator.get_thickness_unit">[docs]</a> <span class="k">def</span> <span class="nf">get_thickness_unit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
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110 | <span class="sd">"""</span> |
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111 | <span class="sd"> :return: the thickness unit.</span> |
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112 | <span class="sd"> """</span> |
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113 | <span class="c"># unit of thickness</span> |
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114 | <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">thickness_unit</span></div></div> |
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