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. 2016 Oct 7;6:35000. doi: 10.1038/srep35000

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Copyright © 2016, The Author(s)

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The main pulse (red line) is focused on the target by an f/10 parabola. The spot size on the target is measured with a microscope objective, making an image on the CCD camera (yellow line). Upstream the last multi-pass amplifier, about 10% of the main beam is split and re-compressed in order to be used as a probe for the EOS diagnostics (blue line). An α-cut BBO, mounted on the EOS crystal holder is used for main-probe synchronization by means of SHG, measured with a CCD camera outside the vacuum chamber (green line).