Figure 7
Efficiency at 7.5 keV with no pre-focusing and pre-focusing using a lens of 750 µm radius (bottom stack), the only usable pre-focusing option at 7.5 keV. Pre-focusing increases the transmission by a factor of ∼2.5. The relative single-pulse intensity measured after the focusing optics is shown as dots versus the gas detector single pulse signal, with a linear fit as a line. The slope represents the relative efficiency. |