|Message: Re: How to define multiple sources intensities from the beam power with GPS||Not Logged In (login)|
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Please find below an example of how to use two sources in Geant4.
# two beams in a generator # # beam #1 # default intensity is 1 now change to 5./gps/source/intensity 5. # /gps/particle proton /gps/pos/type Beam
# # the incident surface is in the y-z plane/gps/pos/rot1 0 1 0 /gps/pos/rot2 0 0 1
# # the beam spot is centered at the origin and is # of 1d gaussian shape with a 1 mm central plateau/gps/pos/shape Circle /gps/pos/centre 0. 0. 0. mm /gps/pos/radius 1. mm /gps/pos/sigma_r .2 mm
# # the beam is travelling along the X_axis with 5 degrees dispersion/gps/ang/rot1 0 0 1 /gps/ang/rot2 0 1 0 /gps/ang/type beam1d /gps/ang/sigma_r 5. deg
# # the beam energy is in gaussian profile centered at 400 MeV/gps/ene/type Gauss /gps/ene/mono 400 MeV /gps/ene/sigma 50. MeV
# beam #2 # 2x the instensity of beam #1/gps/source/add 10.
# # this is a electron beam/gps/particle e- /gps/pos/type Beam
# it beam spot is of 2d gaussian profile with a 1x2 mm2 central plateau # it is in the x-y plane centred at the orgin/gps/pos/centre 0. 0. 0. mm /gps/pos/halfx 0.5 mm /gps/pos/halfy 1. mm /gps/pos/sigma_x 0.1 mm # the spread in y direction is stronger /gps/pos/sigma_y 0.2 mm
# #the beam is travelling along -Z_axis/gps/ang/type beam2d /gps/ang/sigma_x 2. deg /gps/ang/sigma_y 1. deg # gaussian energy profile /gps/ene/type Gauss /gps/ene/mono 600 MeV /gps/ene/sigma 50. MeV
Resulted Distribution Plots: On Fri, 19 Feb 2016 12:09:58 GMT, Leonardo Ghizoni wrote:
> Hello, > > I'm simulating a photon shutter on a synchrotron accelerator, and I'm a > little stuck on defining multiple sources with GPS. > > I have two sources. One is an X-Ray source (100 keV photons) with 200W, > and the other source is of bremsstrahlung radiation (3 GeV photons) but > with 2.513E-3 W. > > My question is how to define both sources in the same run. I tried the > following, but not sure on the intensities: > > # beam #1 > > /gps/source/intensity ?? > > /gps/particle gamma > > /gps/ene/type Mono > > /gps/ene/mono 100 keV > > /gps/pos/type Plane > > /gps/pos/shape Rectangle > > /gps/pos/rot1 0 0 1 > > /gps/pos/rot2 0 1 0 > > /gps/pos/halfx 0.015 mm > > /gps/pos/halfy 0.15 mm > > /gps/pos/halfz 0.15 mm > > /gps/pos/centre 0. 0. 50. cm > > /gps/direction 0 0 -1 > > # beam #2 > > /gps/source/intensity ?? > > /gps/particle gamma > > /gps/ene/type Mono > > /gps/ene/mono 3 GeV > > /gps/pos/type Plane > > /gps/pos/shape Rectangle > > /gps/pos/rot1 0 0 1 > > /gps/pos/rot2 0 1 0 > > /gps/pos/halfx 0.015 mm > > /gps/pos/halfy 0.15 mm > > /gps/pos/halfz 0.15 mm > > /gps/pos/centre 0. 0. 50. cm > > /gps/direction 0 0 -1 > > Thanks a lot! >