Super-precision metrology for synchrotron mirrors, with University of Oxford and Diamond Light Source
Supervisors: Prof. A.M. Korsunsky - University of Oxford Dr. K. Sawhney, Dr H. Wang - Diamond Light Source
A joint fully funded DPhil position is available with the University of Oxford and Diamond Light Source for a research project aimed at developing a novel super-precision metrology technique for synchrotron mirrors.
The Diamond Light Source provides intense beams of X-rays delivered along beamlines to about 30 diverse experiments. X-ray mirrors are widely used to focus the X-rays into sub micrometer focal spots at the sample. The present state-of-the-art lab-based metrology techniques for X-ray mirrors are limited to a precision of ~50-100nrad. To further improve the beam performance with high quality X-ray mirrors, there is need to develop metrology techniques beyond the present state-of-the-art. This project aims to develop a novel super-precision metrology based on a speckle based metrology technique.
The speckle based metrology technique has been extensively developed and researched at Diamond in the X-ray regime. Importantly, an unprecedented angular sensitivity in the range of sub-10 nrad has been demonstrated (Wang, Kashyap and Sawhney, Optics Express, 2015). In the project, the technique will be extended to the visible light regime. This technique has the potential to obtain slope error profiles of X-ray mirrors with unprecedented precisions down to 20 nrad, with great benefits to mirror manufacturers and users of X-ray optics alike.
The successful DPhil student will participate on the design, software development and experimental implementation of the speckle-based metrology instrument, in particular performing the measurements of various types of X-ray mirrors.
This is a joint University of Oxford/Diamond Light Source, 3.5 year fully-funded DPhil project.
Start date: September 2019
Interview date: end of June 2019
Entry requirements and Funding: The studentship is open to UK students with University course fees covered at the level set for UK/EU students (£7730 in 2019-2020 academic year). The stipend (tax-free maintenance grant) will be at least £16,998 for the first year, and at least this amount for a further 3.5 years. Applicants should have or expect to obtain a first class honours degree (or equivalent) in Physics, Engineering or a related subject with a strong interest in doing experimental research using complex tools.