Microsoft PowerPoint - Physics Bucharest

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Basic Monte Carlo Steps (Inside LINAC Head)
 Sample energy of photon created by electron
 Sample angles  and  between incoming electron and created photon
 Select distance to the first interaction
 Probability that the photon will travel a distance l without interaction is
exp(- l)
 m dl is the probability to interact
 Probability to interact between l and l+dl is given by  exp(- l) dl
 
) ln(
1
) 1ln(
1
1
1
0
r r l e r
e ds e lP
l
l
l s
    
  

  
 


  