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NEG Coating Impact on Future Particle Accelerators


About This PhD Project

Project Description

University of Manchester & Cockcroft Institute, Warrington, United Kingdom

Supervisors: Dr. Oleg Malyshev, Dr. Reza Valizadeh (ASTeC, STFC), Prof. Roger M. Jones (Manchester University)

Project Description

Applications are invited for a 3.5-year PhD studentship available from Oct 2019 on the development of technologies that are critical for future particle accelerators. Non-evaporable getter (NEG) coating, originally invented at CERN, is already used in many accelerators due to three main properties: (1) it reduces thermal and photon, electron and ion induced gas desorption acting as a barrier between a vacuum chamber material and an inner vacuum; (2) a fully coated vacuum chamber has large distributed pumping speed, the benefit of this is essential for the narrow vessels with a limited vacuum conductance; (3) the NEG coating has low secondary electron (SEY) yield that helps to supress electron multipacting and electron cloud in high intensity accelerators.

NEG coating is the most promising and most economic solution for a vacuum system of the next generation accelerators. ASTeC, world leader in this area, is working on optimisation of NEG on optimising all three NEG coating benefits. Further development of this technology require working on interdisciplinary field: accelerator, material and vacuum science. There are two main challenges in further NEG coating optimisation: (1) the beam impedance in the NEG coated chamber, which related to beam parameters and NEG coating resistance, this is a problem for short-bunch machines; (2) coating of NEG on narrow tubes with a diameter less than 10 mm, this is a problem for small aperture machines like a future UK-XFEL.

This proposal is related to projects that can intensify studies in reducing the beam impedance in the NEG coated chamber and coating narrow vacuum chambers. The results will be directly applicable for high intensity accelerators such as FCC, CLIC, Hi-LHC, etc., and synchrotron radiation sources such as Diamond-II and UK-XFEL. In many cases, such as a narrow chamber of wigglers and undulators, a NEG coating is the only solution that can provide the required vacuum.

The PhD student will be supervised by ASTeC senior scientists (world leading experts in the field) on-site at the Cockcroft Institute (CI) and registered at the University of Manchester. The majority of the research will be conducted in the VISTA laboratory, the CLARA test bench and Diamond beam line.

The applicant will be expected to have a first or upper second class degree in physics, electrical engineering 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, with some work in the laser lab at Liverpool University.

Funding and eligibility: 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.

Contact for further information: Dr. Oleg Malysev ( or Prof. Roger M. Jones ()
How to apply: http://www.cockcroft.ac.uk/join-us

Anticipated Start Date: October 2019 for 3.5 Years

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