span> <span class="n">model</span><span class="o">.</span><span class="n">N_chr_nuc_spec</span><span class="o">+</span><span class="mi">1</span>
<span class="n">N_spec</span> <span class="o">=</span> <span class="n">end_spec_index</span><span class="o">-</span><span class="n">start_spec_index</span> <span class="c1">#Currently, the number of speckle is 1600.</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="Perform-the-simulation">
<h2>Perform the simulation<a class="headerlink" href="#Perfo