UKAEA Papers

"Women in Physics in the United Kingdom: A Review of Recent Policy and Initiatives"

• S. Jordan
• S. Bakewell
• H. J. Campbell
• J. Coltman
• W. Sadler
• C. Setty

"Investigation of gamma-induced changes to screening currents and AC losses in mono- versus multi-filamentary REBCO coated conductors using DC and AC magnetometry"

• H. J. Campbell
• H. Sasaki
• Y. Zhang

REBCO coated conductor tapes are a highly attractive option for magnet materials in future tokamak fusion power plants. However, the threat of intense neutron and gamma radiation, plus AC loss power dissipation during magnet coil ramping, raises concerns around REBCO magnet coil lifetimes. Irradiation-induced flux creep, or AC loss, has been ide…

"Probing evolution of the flux-pinning landscape in REBCO coated conductors caused by gamma irradiation using DC and AC magnetometry: a novel approach to tokamak magnet material development"

• H. J. Campbell
• Y. Zhang
• T. Fukushima

Optimisation of REBCO coated conductor tapes specifically for use in nuclear fusion will help improve the magnet component lifetimes in future tokamak reactor power plants. The focus of this work was exploration of a novel approach to irradiation studies on REBCO tapes, utilising multiple magnetic measurements to probe evolution of the REBCO flux-p…

"Characterisation of the effects of proton irradiation on functional properties of REBCO coated conductor tapes using a Physical Properties Measurement System"

• H. J. Campbell
• F. Schoofs
• A. Reilly

Rare earth barium copper oxides (REBCO) are a particular class of cuprate high temperature superconductor. The favourable properties of REBCO coated conductor tapes (CCTs) and the well-established production methods have brought these tapes to the forefront of tokamak fusion research, showing a lot of promise for the development of powerful, high f…

"Fission Chamber Data Acquisition system for Neutron FluxMeasurements on MAST-U"

• C. Vincent
• S. Allan
• G. Naylor
• R. Stephen
• S. Bray
• A. Thornton
• A. Kirk

Neutron flux measurements are important in fusion devices for both safety requirements and physics studies. A newsystem has been built for the Mega Amp Spherical Tokamak Upgrade (MAST Upgrade) that provides neutron count,DC and Campbell mode measurements for a 1μsperiod at 1 MHz. The acquisition system uses a Red Pitaya board tosample current from…

"Progress on common aspects of the EU-supplied ITER diagnostics and prediction of diagnostic performance"

• L. C. Ingesson D. J. Campbell M. Cecconello E. Ciattaglia P. Dirken
• Et Al

The European Union will supply a number of diagnostics for ITER. Significant progress has been made on the design and integration of these diagnostics. Specific topics, in common for several of the diagnostics, discussed are port-plug integration, simplification of labyrinths against neutron streaming, and design measures to protect and to be able …

"A model for ideal m=1 internal kink stabilization by minority ion cyclotron resonant heating"

• R. O. Dendy
• R. J. Hastie
• K. G. McClements
• T. J. Martin

A generalized energy principle is used to determine the effect of ion cyclotron resonant heating (lCRH) on the stability of m = 1 intemal kink displacements in the low-frequency limit: such displacements are associated with sawtooth oscillations. An integral expression is obtained for the contribution to the plasma energy of an ICRH-heated minority…