Fellowship Scheme UKAEA - PPPL

United Kingdom Atomic Energy Authority (UKAEA)

  • London & South East England
  • ¬£Excellent
  • Academic - PhD/MSc
  • Closing date 31 Mar 2019

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Job ref: 3328

Job type: FTA 2 years FT
Location: Culham, Oxfordshire
Salary: c£35,000 + excellent benefits including outstanding pension scheme
Closing date: 28th February 2019

The UK Atomic Energy Authority (UKAEA) is a pioneer in the quest to deliver commercial fusion energy (the process that powers the Sun and the stars). Based at Culham Centre for Fusion Energy (CCFE) in Oxfordshire UK, we host the world`s largest operating fusion experiment (JET) and a state-of-the-art spherical tokamak: MAST Upgrade due to commence operation in 2019. The UKAEA compact fusion project is exploring the options for a next step Spherical Tokamak (ST) device leading towards fusion power.

The UK Atomic Energy Authority have a number of excellent opportunities for recent post docs to work collaboratively with Princeton Plasma Physics Laboratory on a 2 year fixed term appointment starting in either May or October 2019. The specific projects are detailed below:

- Advancing computational modelling of liquid metal magnetohydrodynamics towards digital twins of the fusion blanket and divertor. This project will extend the practice of liquid metal computational modelling with emphasis on models founded on new or historical experimental data, and with focus on a scalable platform for multi-disciplinary and multi-physics simulations, with the ultimate aim of demonstrating the digital twin concept for a liquid metal component.

- Pedestal predictions in spherical tokamaks The person working in this position will investigate the pedestal structure both in MAST and NSTX. The experimental results will be compared with the predictions using the EPED1 model to validate and improve the model for STs.

- RWM stability ST are expected to run at high normalised pressure and beyond the no wall limit, which requires wall stabilisation and an understanding of resistive wall modes. This project would use linear MHD codes which include the kinetic effects required for stabilisation at low plasma rotation to model NSTX-U, MAST-U and future ST plasmas.

- Disruptions/mitigation and/or 3D equilibrium/stability Disruptions EM and thermal loads are an issue for all future reactors. Modelling of these loads can be done either by taking quasi-plasma-equilibria or by using a code that includes a transport model. The effect of mitigation will also be modelled. Forces will also be modelled and compared to experiments on MAST-U and NSTX-U

- EMC3-EIRENE for NSTX/MAST This project will sue the EMC3-EIRENE code to model the effect of 3D fields (TF ripple, error fields and applied 3D perturbations for ELM control) on the divertor geometry in MAST-U and NSTX-U. In particular, how these non-axisymmetric fields affect the low poloidal field region in the super-X and snow flake divertor configurations.

- Core confinement at high beta, low flow in spherical tokamak`s (ST`s) STs have traditionally operated with high toroidal flows, which has had a positive effect on confinement. Future STs may not have such high flows and in order to make confinement predictions it is important to understand the role of these flows on the underlying transport. This project will use the GS2 code to perform these studies.

- Radio Frequency heating and current drive schemes for spherical tokamaks This project will perform RF modelling calculations on MAST-U, NSTX-U and future STs using and developing state of the art codes looking at various aspects of the discharge: Start-up, ramp up and flat top. The candidate will be involved in the experimental programmes on MAST-U, NSTX-U and elsewhere in order to broaden knowledge and obtain data required to validate the codes

- Exploitation of machine Learning in spherical tokamaks The person working on this project will work with scientists at PPPL and at CCFE on exploiting advances in Data Science, notably AI and Machine Learning to further the PPPL and UKAEA Spherical Tokamak programmes.

- Developing advanced plasma scenarios for spherical tokamaks The person working on this project will undertake scenario development on MAST-U and NSTX-U to produce high performance discharges and perform simulations of plasma start-up and plasma evolution using one or more state of the art codes.

At UKAEA we strive to make everyone feel welcome and fully supported. Our Ambassadors are actively promoting and advancing diversity and inclusion in the organisation to help make our Organisation an employer of choice. UKAEA has a graded career structure and our mentoring scheme will enable you to reach your true potential. For further details on UKAEA and our benefits please download the application pack.

Knowledge skills and experience

- A degree OR equivalent experience in physics or a related engineering discipline
- A PhD in physics/related engineering discipline of relevance to the individual project - Specific research experience to relevant individual projects as described above
- Good knowledge of fusion and the current challenges
- Excellent verbal and written communications skills
- Self-motivated and capable of working in a team
- Ability to work in an international environment with multiple-objectives

Special requirements:
The Jobholder is expected to spend about 3 months/year visiting the Princeton Plasma Physics Laboratory in the US. Please note: all employees working at the UK Atomic Energy Authority will be required to complete an online Disclosure Certificate application as part of their clearance - The Disclosure & Barring Service (DBS) checks will show the details of all current criminal convictions (convictions considered unspent under the Rehabilitation of Offenders Act 1974) or will confirm that there are no such convictions.

Selection Method(s):
- First stage will be telephone interviews followed by further assessments to assess knowledge and experience.

- Please be advised that this vacancy may close earlier than stated if large or sufficient numbers of applications are received. - Please note UKAEA do not pay travel expenses for interviews.
- The UK Atomic Energy Authority actively promotes equality and values diversity in our workforce. We operate a number of flexible working arrangements (such as part-time working/job share/home working). Flexible working may be available with this role

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