Helen Brooks Stephen Dixon Andrew Davis
We present new two applications, AURORA and Achlys, developed using the MOOSE framework for finite element analysis, intended to facilitate engineering analysis for fusion reactors. Respectively these couple neutronics and tritium transport to native MOOSE physics modules including heat conduction and tensor mechanics. We outline steps taken to pe…
PreprintC. 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…
Preprint PurchaseStephen Reynolds
Fusion Energy has a chance to provide a key role in a future carbon free world by supplementing other variable renewable energy sources and providing a baseline energy supply. Although fundamentally similar, proposed Fusion reactors have a very different radioactive waste profile from current Fission reactors, combined with the fact that radioac…
PreprintC.I. Stuart G. Artaserse P. Card I.S. Carvalho R. Felton S.N. Gerasimov A. Goodyear R.B. Henriques D. Karkinsky P.J. Lomas P. McCullen F. Rimini A.V. Stephen D.F. Valcárcel J. Waterhouse M. Wheatley
Plasma Event TRiggering for Alarms (PETRA) is a flexible new system at JET for detecting plasma events to trigger exception handling responses. It provides a platform for all existing and new techniques which involve processing JET real-time data to identify when to change the trajectory of a plasma shot, and reduces the technical cost and risk in …
Preprint PublishedEmil T. Jonasson Jonathan Beouf Stephen Kyberd Robert Skilton
Just like most industrial or scientific installations, future fusion reactors will require more or less frequent maintenance. The expected environmental conditions, as well as the necessity of carrying out many maintenance tasks in parallel in result in remote robotic maintenance becoming a necessity in order to minimize the maintenance shutdown du…
Preprint PublishedEmil Jonasson Jonathan Boeuf Stephen Kyberd Robert Skilton Paul Amayo Guy Burroughes Steve Collins
The containment vessel of the Joint European Torus is a huge, complicated assembly with a myriad of components, all of which are important for plasma operation. As a research device, JET has been operated over many years and has been extensively rebuilt. During each maintenance shutdown, inspections and measurements of the Vacuum Vessel are carri…
Preprint PublishedJ. S. Edwards I. S. Carvalho R. Felton C. Hogben D. Karkinsky P. J. Lomas P. A. McCullen F. G. Rimini A. V. Stephen
The JET Real-Time Protection Sequencer (RTPS) co-ordinates responses for magnetic and kinetic actuators to protect the ITER-Like Wall from possible melting events and other undesirable scenarios. It allows programmable stop responses per pulse, based on alarms raised by other systems. The architecture combines a modular run-time application deve…
Preprint PublishedLuc Andre Kathrin Abraham Axel Hofmann Laurence Monin Ilka C. Kleinhanns Stephen Foley
How the Archean felsic crust grew from its mafic precursors between 3.8 and 2.5 billion years ago remains elusive and the subject of great debate. Here, we present silicon isotopic constraints on Tonalite-Trondhjemite-Granodiorite (TTG) and Granite-Monzonite-Syenite (GMS) plutons from the Kaapvaal craton, which range in age from 3.55 to 2.69 Ga.…
Preprint PublishedF. G. Rimini D. Alves G. Arnoux M. Baruzzo E. Belonohy I. Carvalho R. Felton E. Joffrin P. Lomas P. McCullen A. Neto I. Nunes C. Reux A. Stephen D. Valcarcel S. Wiesen JET EFDA contributors
The JET tokamak is unique amongst present fusion devices in its capability to operate at high plasma current, providing the closest plasma parameters to ITER. The physics benefits of high current operation have to be balanced against the risks to the integrity of the machine due to high force disruptions. The installation of the ITER-Like Wall (ILW…
Preprint PublishedJ. Figueiredo J. Mailloux K. Kirov D. Kinna M. Stamp S. Devaux G. Arnoux J. S. Edwards A. V. Stephen P. Mccullen C. Hogben JET EFDA Contributors
Arcs are the potentially most dangerous events related to Lower Hybrid (LH) antenna operation. If left uncontrolled they can produce damage and cause plasma disruption by impurity influx. To address this issue an arc real time control and protection imaging system for the Joint European Torus (JET) LH antenna has been implemented. The LH system is …
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