7 Numerical Simulation of Generation, Distribution, and Impact …
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We used the results of the classical works of Firsov and Beta Bloch, as well as,
experimental data for the energy loss function F(u) =
1
n a
dE
dx
. To pass protons
through atomic oxygen [7], an approximation expression was obtained for F(u) [6].
It is in satisfactory agreement with experimental data. Based on it, the change in the
velocities (Fig. 7.7) and the concentration of electrons formed after passing through
TPB was calculated (Fig. 7.8):
n e (x) =
N p
π 2 R(x)a(x)
F
W e
,
Fig. 7.7 Change of the particle velocity v(x, n f )
Fig. 7.8 Change of the electron concentration