## Exercise: Insert a different sample

1. Next, let us insert something more interesting. Remove the V_sample and PSD_monitor_4PI_log. Insert a Powder2 component with the following parameters:

       COMPONENT sample = Powder2(radius=0.01,h=0.01, q_1=1, q_2=1.3,
          w_1=0, w_2=0, d_phi0=0.1, pack=0.5, DW=0.9, frac=0.5,
          focus_r=0.03, j_1=8, j_2=4, F2_1=1000, F2_2=1000,
          Vc=3.86*3.86*11.82, sigma_a=0, sigma_inc=2,
          target_x = 0, target_y = 0, target_z = 0)
         AT (0, 0, 0) RELATIVE a4

   (Adjust placement relative to your component naming etc.). Also insert a banana shaped detector,

       COMPONENT ND = Monitor_nD(xwidth=1, options="banana, theta limits=[-45 45],auto y")
         AT (0,0,0) RELATIVE a5

   and take away the previously inserted Beamstop. Run a long simulation (many neutron rays) and have coffee.