Testing Three-Body Quantum Electrodynamics with Trapped Ions: Evidence for a -dependent Divergence Between Experiment and Calculation

CT Chantler, MN Kinnane, JD Gillaspy, LT Hudson… - Physical Review Letters, 2012 - APS
We report a new test of quantum electrodynamics (QED) for the w (1 s 2 p P 1 1→ 1 s 2 S 0
1) x-ray resonance line transition energy in heliumlike titanium. This measurement is one of …

Helium-like titanium x-ray spectrum as a probe of QED computation

AT Payne, CT Chantler, MN Kinnane… - Journal of Physics B …, 2014 - iopscience.iop.org
We discuss the first absolute energy measurements of the intercombination and forbidden
transitions ($ x, y, z $) in trapped Ti 20+ ions to 15 parts per million accuracy. We present …

Measuring the linearity of X-ray detectors: consequences for absolute attenuation, scattering and absolute Bragg intensities

Z Barnea, CT Chantler, JL Glover… - Journal of Applied …, 2011 - journals.iucr.org
The linearity of response of X-ray detectors is tested. Examples of linearity tests demonstrate
the remarkable range of linear response of flowing-gas ion chambers in the synchrotron …

Count‐rate, linearity, and performance of new backgammon detector technology

HA Melia, JW Dean, LF Smale, AJ Illig… - X‐Ray …, 2019 - Wiley Online Library
The meander wire backgammon technology has high levels of flux and spatial linearity
across a wide range of energies. One of the attractive features of these technologies is the …

Recent developments in X-ray tests of quantum electrodynamics

CT Chantler, JA Kimpton - Canadian Journal of Physics, 2009 - cdnsciencepub.com
Experimental tests of quantum electrodynamics (QED) have developed dramatically for
simple systems of hydrogen and helium, but there has also been significant progress for …

Optimisation of the spatial linearity in backgammon-type multi-wire gas proportional counters—The relevance of charge cloud distribution

AT Payne, JA Kimpton, LF Smale… - Nuclear Instruments and …, 2010 - Elsevier
The backgammon-type multi-wire gas proportional counter (MWPC) enables the detection of
X-ray photons in two dimensions with a high degree of spatial linearity. An accurate …