|Message: Re: Proton behaves strange in scintillating calorimeter||Not Logged In (login)|
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Thank you so much for answering my question!
On Tue, 13 Aug 2013 21:49:37 GMT, Dennis H. Wright wrote:
> Not knowing the structure of your calorimeter, my guess would be that > the protons, in addition to creating a lot of scintillation light in the > first few layers, will interact hadronically, producing other hadrons > like neutrons and pions which will make it to the deeper layers and > cause more scintillation there. > > The pi0 will convert quickly to gammas and, like electrons, produce an > EM shower with relatively few particles penetrating to the deeper > layers. > > In short, perhaps what you are seeing is reasonable. >
The structure is simple: The calorimeter is composed by 20 layers, each layer contain one thin scintillating glass layer and one iron inter layer. The iron layer will absorb the energy of incoming particle.
> my guess would be that > the protons, in addition to creating a lot of scintillation light in the > first few layers, will interact hadronically, producing other hadrons > like neutrons and pions which will make it to the deeper layers and > cause more scintillation there.
Maybe you are right, the hadronic interaction created more particles that would be stopped in different layers. When I run 1000 events, and normalize the result, I got a different graph(see attached). For shooting 1000 photons, the small peaks in the tail of graph are gone.
Based on above extra information, can you come up more explanations?