Millimetre-wave injector for THz linear accelerators

THz linear accelerators (LINACs) offer potentially higher accelerating gradients than traditional RF structures while offering inherently better stability than other novel acceleration techniques. However, many limitations still need to be overcome to enable practical applications based on THz linacs. This is an exciting project aimed at the design and realisation of an injector optimised to inject into a THz linac with low energy spread and high beam capture considering the coupling into these structures in the correct mode, manufacture and tuning of the structure, and longitudinal and transverse beam dynamics. The student will investigate optimum frequencies and transition energies. Additionally, the use of machine learning tools and numerical and/or field methods will be investigated to assist the fast optimisation of these structures. The project builds upon recent work between Lancaster and Manchester aimed at defining a process for the optimisation of a multistage acceleration scheme including consideration of transverse forces and output beam quality.

This is also 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. The 3.5-year project is expected to start in October 2025. 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 ([email protected]), Prof. Graeme Burt ([email protected] ) or Prof. Rob Appleby ([email protected] ) 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 Notes

Upon acceptance of a student, this project will be funded by the Science and Technology Facilities Council for 3.5 years; UK citizens are eligible to apply. 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.