Figure 2
From: Bright betatron X-ray radiation from a laser-driven-clustering gas target
The measured betatron emission characteristics: The emission beam profile obtained using 36 μm Al foil wrapped IP for Ar target (a) and He target (b), respectively.The hallow cloud signal in (a) (left side) was caused by low energy electrons bypassing the magnet. The measured (square) and modeled (triangle) X-ray signal for different filters are shown in (c). The inset shows the beam profile recorded after the cut-off filters 18 μm Al (I), 18 μm Al + 10 μm Cu (II), 18 μm Al + 20 μm Cu (III) and 18 μm Al + 30 μm Cu (IV), with different cutoff energy 2.4 keV, 3.4 keV, 4.1 keV and 6.2 keV, respectively. Modeling is based on a best fit of synchrotron spectrum with Ecrit = 0.6 keV.
