Phd Studentship: Super-precision metrology for synchrotron mirrors

Website DiamondLightSou Diamond Light Source

Supervisors & University

University: University of Oxford

University Supervisor: Prof. A. M. Korsunsky

University Group: Solid Machanics and Materials Engineering

Diamond Supervisors: Dr. K. Sawhney and Dr. H. Wang

Diamond Group: Optics and Metrology

Project Description

A fully funded PhD position is available between 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. It would be of great benefit to the mirror manufacturers and users of X-ray optics alike.

The successful PhD 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.

Project Details

This is a joint University of Oxford/Diamond Light Source, 3.5 year fully-funded PhD project.

Start date: September 2019

Entry requirements and Funding: The studentship is open to UK, EU and international students but the University fees are covered only at the UK/EU rate. Therefore overseas students would have to provide the difference between the UK/EU and the overseas student rates for University fees from some other source, such as a scholarship or personal funds. 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.


Applications to studentships need to be made through the University, rather than to Diamond Light Source.

If you would like to be alerted when applications for this studentship open, please e-mail specifying the project(s) that you are interested in.

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