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UK Accelerator Institutes Seminar Series Spring 2026 (Session 16)

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Adam Noble (University of Strathclyde & The Cockcroft Institute), Emmanuel Tsesmelis (CERN), Ian Bailey (Lancaster University / Cockcroft Institute of Accelerator Science and Technology), Lee Jones (ASTeC (STFC Daresbury Laboratory) & The Cockcroft Institute)
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UK Accelerator Institutes Seminar Series

Further abstracts will be added in due course.  Seminar slides and recordings can be found in the timetable.

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  • Thursday 14 May
    • 1
      Observation of quantum effects on radiation reaction in strong fields

      Radiation reaction describes the effective force experienced by an accelerated charge due to radiation emission. Quantum effects dominate charge dynamics and radiation production for charges accelerated by fields with strengths approaching the Schwinger field, Esch = 1.3 × 1018 Vm-1. Such fields exist in extreme astrophysical environments such as pulsar magnetospheres and may be accessed by high-power laser systems. Classical radiation reaction theories do not limit the frequency of radiation emitted by accelerating charges and omit stochastic effects inherent in photon emission, thus demanding a quantum treatment. Such models are of fundamental importance, providing insight into the effect of the electron self-force on its dynamics in electromagnetic fields. The difficulty of accessing conditions where quantum effects dominate inhibited previous efforts to observe quantum radiation reaction in charged particle dynamics with high significance.

      We report the first direct, high significance (> 5σ) observation of strong-field radiation reaction on charged particles. Using a Bayesian analysis framework, we obtain strong evidence favouring two quantum radiation reaction models, which perform equivalently, over a classical model.

      Speaker: Eva Los (University of Oxford)
  • Thursday 21 May
    • 2
      Seminar 2
  • Thursday 28 May
    • 3
      Advanced imaging techniques with laboratory and laser driven x-ray sources

      Synchrotron facilities are the gold standard for x-ray imaging. However, the high demand for easily accessible, low-cost sources has driven the widespread use of standard laboratory x-ray sources, based on solid rotating anode, nowadays used in industries, airports, as well as hospitals and universities.

      In between the synchrotron and the standard laboratory sources, there is a new generation of x-ray sources promising compactness and high quality (coherence) x-ray beam: this includes sources based on liquid metal anode, on inverse Compton scattering, and driven by high power lasers.

      Here we present the most advanced x-ray imaging methods that aim to achieve synchrotron-like image quality using standard and new x-ray sources. We review recent results, including both non-interferometric and interferometric approaches, and discuss the future possibility of pushing the limits of temporal and spatial resolution.

      Speaker: Silvia Cipiccia (UCL)
  • Thursday 4 June
    • 4
      Seminar 4
  • Thursday 11 June
    • 5
      The LhARA Project
      Speaker: William Shields
  • Thursday 18 June
    • 6
      The Electron-Ion Collider (EIC)
      Speaker: Dr Tatiana Pieloni (EPFL)