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11

Properties of the direct beam source

Four blurring steps:

1. Electron beam distribution

2. Electron scattering in target

3. Brems X-section angular

distribution

4. Coherent scatter in flattening

filter (affecting the view of the

source from downstream)

e

-

h

n

-4

-2

2

4

0.2

0.4

0.6

0.8

1

dist [mm]

Convolved with one coherent

scattering event

Source distribution