@INSERTION LOSS (SPD)

• The losses caused by external factors for single photon detector.If @SPD_NUM is larger then one, list them separated by ",".
• Is store as insertion_loss in the fortran code.

example

@INSERTION_LOSS
0.0, 0.0

Which mean the system has two single photon detector. And their external loss are 0.

Formula: prob = 10**(-(insertion_loss)/10.0)
If the RANDOM_NUMBER bigger then prob, the photon will regarded as death.