We simulate the electron transmission through insulating Mylar (PET)capillaries. We show that the mechanisms underlying the recently discoveredelectron guiding are fundamentally different from those for ion guiding.Quantum reflection and multiple near-forward scattering rather than theself-organized charge-up are key to the transmission along the capillary axisirrespective of the angle of incidence. We find surprisingly good agreementwith recent data. Our simulation suggests that electron guiding should also beobservable for metallic capillaries.
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