S. Glenn | Searcharxiv

arXiv2024

The Next Generation of MeV Energy X-ray Sources for use in the Inspection of Additively Manufactured Parts for Industry

For the first time, we demonstrate the application of an inverse Compton scattering X-ray Source, driven by a laser-plasma accelerator, to image an additively manufactured component. X-rays with a mean energy of 380 keV were produced and used to image an additively manufactured part made of an Inconel (Nickel 718) alloy. Because inverse Compton scattering driven by laser-plasma acceleration produces high-energy X-rays while maintaining a focal spot size on the order of a micron, the source can provide several benefits over conventional X-ray production methods, particularly when imaging superalloy parts, with the potential to revolutionise what can be inspected.

physics.acc-ph↗

arXiv1998

$Υ$ Dipion Transitions at Energies Near the $Υ(4S)$

Using a data sample collected with the CLEO II detector at CESR, we have searched for dipion transitions between pairs of $Υ$ resonances at energies near the $Υ(4S)$. We obtain upper limits $B(Υ(4S)\to Υ(2S)π^+π^-) < 3.9 \times 10^{-4}$ and $B(Υ(4S)\to Υ(1S)π^+π^-) < 1.2 \times 10^{-4}$. We also observe the transitions $Υ(3S)\to Υ(1S)$, $Υ(3S)\to Υ(2S)$, and $Υ(2S)\to Υ(1S)$, from which we measure the cross-sections for the radiative processes $e^+e^- \to Υ(3S)γ$ and $e^+e^- \to Υ(2S)γ$.

hep-ex↗