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A period of the magnetic field distribution of leaf undulator, peak magnetic fields in x and y directions are both 0.35 T, period
Projection in one period of electrons’ (a) trajectory in x-y plane, (b) trajectory in y-z plane, (c) trajectory in x-z plane, and (d) velocity in x-y plane. The arrows and the sequence of the letters indicates the moving direction of electrons. (d) shows a leaf-like curve.
Spatial distribution of (a) power density and (b) 7 eV fundamental’s flux. .
(a) Spectrum of leaf undulator and (b) its corresponding linear polarization degree vs photon energy. In (b), Positive (negative) values represents the 45° (135°) linear polarization. , period , period , aperture .
Projection of electrons’ trajectory in x-y plane under different . , the photon energy of fundamental is 7 eV.
Performance comparison of several undulators for generation of linear polarization. Beam energy: 3.5 GeV, undulator length: 6.6 m, fundamental photon energy: 7 eV, aperture size: . , , and represent the photon flux of the fundamental, second harmonic and third harmonic, respectively.
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