Hybrid source @ 8GeV: particles distributions after the crystal and after the amorphous

Publié le 17 juillet 2009 par admin

A 8 GeV electrons beam (composed by 1.1e+4 particles) impinge on a <111> oriented tungsten crystal of 1mm thickness.

Particles at the exit of the crystal

For display reason a cut is apply on px and py value (abs(px&&py)<20 MeV/c).

First case a transverse distribution of sigma=1mm is added to the particles transverse distribution

Electrons phase space at the exit of the crystal

Photons phase space at the exit of the crystal

Positrons phase space at the exit of the crystal

Second case a transverse distribution of sigma=2.5mm is added to the particles transverse distribution

Electrons phase space at the exit of the crystal

Photons phase space at the exit of the crystal

Positrons phase space at the exit of the crystal

Particles at the exit of the amorphous

The photons at the exit of the crystal is use to impinge on 8mm amorphous tungsten
(for 2.5mm rms value)
After the amorphous px,py and pz are defined by the following
$p_z=cos\phi=\frac{P_z}{P}$
$p_y=sin\phi sin\theta=\frac{P_y}{P}$
$p_x=sin\phi cos\theta=\frac{P_x}{P}$

Photons phase space at the exit of the amorphous

Electrons phase space at the exit of the amorphous

Positrons phase space at the exit of the amorphous

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