Modelling the instrumental response in CSNS neutron total scattering experiments involving inelastic samples

The file example.gdml can generate the raw data of the non-biased results shown in Figure 10(a). To reproduce the results, please follow the steps:Step 1: Run prompt -g example.gdml -n 1e9Step 2: Run hist_lambda_theta_Sim.py to use the HDF5 data format to store the data in the mcpl files produced by WlAngle scorers.Step 3: Run Figure_10a.py to analyse the HDF5 data produced by step 1 and plot the results.6. The file example.gdml can also be used for Run 1 listed in Table 3.

According to Table 3 and Table 4, the gdml files for other runs can be obtained by modifying the configurations of the volumes named LV_Tube_SampleStick, LV_Tube_SampleHolder, LV_Tube300_He and LV_Tube500_He in example.gdml. For the biased simulations mentioned in Figure 10, the configuration string named scatter_bias has to be specified. More details about the introduction of the gdml configurations can be found in Table 2, Table 4 and Ref.[21] in the manuscript.