Externally coupled structures for THz-driven electron beam deflection

About the Project

This project is a unique opportunity to join a vibrant research team from Lancaster University, University of Manchester and The Cockcroft Institute at Daresbury Laboratory, Warrington, UK, developing world leading concepts for novel acceleration using laser-generated THz pulse.

In the drive toward the understanding and exploitation of laser generated THz pulses through structures that can mediate the interaction process for the control of electron beam properties, dielectric lined waveguides (DLWs) have emerged as one of the most promising solutions. These structures consist of a metallic waveguide lined internally with thin layers of dielectric and can be designed to enhance the interaction between a strong THz field and relativistic electron bunches. By choosing the appropriate electromagnetic mode, these can be optimised as THz-driven deflecting structures for ultrafast diagnostics and beam manipulation. However, several challenges in the design and optimisation of these structures exist, such as the integration of efficient coupling sections to convert the Gaussian cross section mode typically generated by the external THz source into the correct waveguide mode. This project seeks to progress from previous leading work at Cockcroft in rectangular section THz DLWs for beam manipulation. The aim is to develop novel structures for THz-driven beam deflection that maximise efficiency of external THz pulse coupling into the DLW deflecting mode. The project will include studies of the manufacturing and tuning of these structures, longitudinal and transverse beam dynamics, and experimental characterisation.

The 3.5-year project is expected to start in October 2026. The work is mainly based on numerical computation, using full wave electromagnetic codes such as CST Particle Studio. The work will include the development of prototype structures, their test in a THz bunker and data analysis. We welcome applications from students holding or expected a first or upper second-class degree in physics or electronic engineering or other appropriate qualification. Candidates should have a good understanding of electromagnetic theory. Computational skills are desirable but not essential.

Information about the Cockcroft Institute can be found at https://www.cockcroft.ac.uk/

Potential applicants are encouraged to contact Dr. Rosa Letizia (r.letizia@lancaster.ac.uk), Prof. Graeme Burt (g.burt1@lancaster.ac.uk) or Prof. Rob Appleby (Robert.Appleby@manchester.ac.uk) for more information.

Candidates interested in applying should send a copy of their CV together with a personal statement/covering letter addressing their background and suitability for this project to Dr. Letizia and additionally follow the application process detailed at https://www.cockcroft.ac.uk/education/phd-opportunities/.

Funding and eligibility: Upon acceptance of a student, this project will be funded by the Science and Technology Facilities Council for 3.5 years. This consists of a tax free stipend at UKRI rates, university fees at the home (UK) rate, plus support for travel to conferences and workshops. A full package of training and support will be provided by the Cockcroft Institute, and the student will take part in a vibrant accelerator research and education community of over 150 people.

Contact for further information: Dr. Rosa Letizia r.letizia@lancaster.ac.uk

How to apply: Apply at the Cockcroft Institute PhD webpage. For full consideration for funded awards, please apply by Jan 31st 2026.

Anticipated Start Date: October 2026 for 3.5 Years