Harun Tugal Salvador Pacheco-Gutierrez Myles Verdon Ipek Caliskanelli Alfie Sargent Alice Cryer Ronan Kelly Alexandros Plianos Andika Yudha Qasim Kapasi Robert Skilton
Robotic systems that enable the operators to remotely manipulate delicate materials with high dexterity and sufficient force feedback will pave the path for improvements of the safe maintenance and decommissioning processes within the nuclear industry. Training the operators, however, for challenging conditions (e.g., low visibility, restricted …
Preprint PurchaseR. Scannell H. Liu E. Mukhin E. Yatsuka A. Gorbunov L. Giudicotti G. Kurskiev J. Chen M. A. Van Zeeland D. Finkenthal R. Imazawa D. Brower A. Sirinelli T. Akiyama T. Carlstrom D. Johnson M. Lesher C. Watts M. Bassan
This paper provides an overview of the status of the laser diagnostics to be implemented on ITER. This includes descriptions of the Thomson scattering in the Core, Edge and Divertor regions, polarimetry and interferometry diagnostics used for measuring plasma density and also measurements of Helium density in the divertor using Laser Induced Flo…
PreprintJames H.P. Rice Jianzhao Geng Rodney A. Badcock Dominic A. Moseley Steven Wray Heng Zhang
The application of dc magnetic field to a 2G high temperature superconducting (HTS) tape can reduce the critical current Ic of the tape, without driving the material normal. This property can be used in the development of HTS switching elements through so-called Jc(B) switching. The design of a dc magnetic field switch is reported, in both singl…
PreprintB. Din A. I. Blair F. Schoofs D. P. Hampshire
Understanding the properties of grain boundaries in polycrystalline superconductors is essential for optimizing their critical current density. Here, we provide computational simulations of 2D Josephson junctions (JJs) in low magnetic fields using time–dependent Ginzburg–Landau theory, since they can be considered a proxy for a grain boundar…
PreprintL. W. Packer P. Batistoni N. Bekris S. C. Bradnam H. Chohan M. Fabbri Z. Ghani M. R. Gilbert R. Kierepko E. Laszynska D. Leichtle I. Lengarf S. Loreti J. W. Mietelski C. R. Nobs M. Pillon M. I. Savva I. E.Stamatelatos T. Vasilopoulou A. Wojcik-Gargula A. Zoharf JET Contributors
The characteristically intense neutron source generated in deuterium-tritium (DT) fusion power presents notable challenges for materials comprising the structure of the device which are exposed to them. These include radiation damage effects leading to degradation of structural properties with impact on maintenance and replacement frequency, but…
PreprintD. McGarrigle E. Flynn C. Kennedy A. Loving S. Budden
This paper reports on a study of the existing or proposed maintenance arm systems with similar functions and structure to that of the proposed DEMO Multi-Purpose Deployer (MPD).The current MPD design iteration consists of a boom deployment system that is ~30m long and can support a payload of ~1000kg, while still being able to access the DEMO va…
Preprint PublishedD. B. King M. Nicassio A. Ash C. Balshaw A. Barth D. Ciric I. E. Day E. Delabie H. El-Haroun T. T. C. Jones D. Keeling R. King S. Marsden R. McAdams A. McShee S. Merriman A. Shepherd R. Sharma I. Turner T. Wilson
Neutral Beam Injection (NBI) is a very flexible auxiliary heating method for tokamak plasmas, capable of being efficiently coupled to the various plasma configurations required in the Tritium and Deuterium–Tritium Experimental campaign (DTE2) to be undertaken in the JET device. In particular, experiments for high fusion yield and alpha particl…
PreprintEnrique Miralles-Dolz Alexander Pearce James Morris Edoardo Patelli
To make informed decisions during the concept selection activities of a fusion power plant it is necessary to evaluate the impact of uncertainties on the feasibility and performance of each concept. A framework for uncertainty quantification and sensitivity analysis has been developed for the PROCESS systems code to allow the direct comparison o…
PreprintA.J. Pearce S. Kahn J. Morris S.I. Muldrew
Conceptual designs for a European demonstration power plant (EU-DEMO) are based on extrapolations of physics scaling laws and current understanding of engineering limits based on available technologies. It is imperative to quantify the impact of uncertainties in physics and engineering parameters on the ability to produce an economically attract…
PreprintJ. Mitchell A. Parrot F. E. Eriksson F. Casson O. Bardsley M. Lennholm H. Meyer S. Aleiferis
In this paper we present optimized actuator trajectories, evolving in time and space, of non-inductive ramp-up scenarios for the Spherical Tokamak for Energy Production (STEP). These trajectories are computed by solving a non-linear, multi-objective, constrained, finite-time optimal control problem. A method unique to STEP ramp-up studies that prov…
Preprint Published