BeamPipeHeating 4mmthick PbBi PositronTarget
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A 10 MeV electron beam with a radius of 0.5 cm was incident on a 4 mm thick PbBi target. The target is positioned at Z = -900 mm. The plot below shows the energy deposited in MeV along the pipe. The Z axis is along the beam direction. The arec lenc of the beam pipe is determine by taking the pipe radius (34.8 mm) and multiplying it by the Phi angle around the pipe. The bins are 1cm x 1cm.
About 25,000 MeV/cm^2 is deposited when 20 Million , 10 MeV electrons are incident on a 4 mm thick PbBi target.
Below is energy deposited contributions from from photons(AVSzWg), positrons (AVSzWpos), and electrons.
Why is the positron hotspot upstream of the target?
root commands used
TH2D *AVSz=new TH2D("AVSz","AVSz",100,-1000,0,12,-60,60)
BeamPipeE->Draw("35.*atan(PosYmm/PosXmm):PosZmm>>AVSz","DepEmeV");
AVSz->Draw("colz");