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Microbunching Instability Suppression for Improved FEL performance

Cockcroft Institute

Liverpool United Kingdom Nuclear Physics Other

About the Project

Recent advances in Free Electron Lasers (FELs) have seen peak X-ray brightness increase by several orders of magnitude, and pulse durations decrease from 100 fs down to <10 fs. With these advancements, a new world of possibilities has been afforded researchers to image atomic structure of proteins and explore dynamical processes in timescales on the order of femtoseconds.

Control of the longitudinal coherence (i.e. the spectral amplitude and phase) of x-ray pulses is highly sought after in the FEL user community. Presently, the ability to achieve longitudinal coherence is limited by a phenomenon called microbunching instability (MBI). This project will investigate the non-linear dynamics of microbunching evolution using a new technique involving ‘caustics’, as well as investigating the possibility of using intra-beam scattering to suppress microbunching instability. There is also the opportunity to formulate an end-to-end optimization utilizing some Machine Learning tools.

The applicant will be expected to have a first or upper second-class degree in physics or other appropriate qualification. A full graduate programme of training and development is provided by the Cockcroft Institute. The student will be based primarily at the Institute at Daresbury, and pandemic-willing, will travel to MAX-IV for some experimental work.

Potential applicants are encouraged to contact Dr. Tessa Charles () for more information. This position will remain open until filled.

You can find out more about being a PhD student at the Cockcroft Institute here, where you can download an application form and also find out about the other PhD projects available at the Cockcroft.

To apply for this project, fill in the application form and email it with your CV to .

Potential applicants are encouraged to contact Dr. Tessa Charles () for more information. This position will remain open until filled.

UKRI studentships cover a student stipend but do not cover the full costs of international tuition fees and the Cockcroft Institute cannot waive the excess. However, we aim, but cannot guarantee, to cover full fees for successful international applicants.

Anticipated Start Date: October 2021 for 3.5 Years

Funding Notes

Upon acceptance of a student, this project will be funded by the Science and Technology Facilities Council for 3.5 years; UK and other EU 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. An IELTS score of at least 6.5 is required.

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