Gavin Pearson
A5043630231- Magnetic confinement fusion research
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Semantic Web and Ontologies
- Logic, Reasoning, and Knowledge
- Military Strategy and Technology
- Service-Oriented Architecture and Web Services
- Privacy-Preserving Technologies in Data
- Muon and positron interactions and applications
- Advanced Database Systems and Queries
- Big Data and Business Intelligence
- Scientific Computing and Data Management
- Nuclear and radioactivity studies
- Laser-Plasma Interactions and Diagnostics
- AI-based Problem Solving and Planning
- Access Control and Trust
- Distributed systems and fault tolerance
- Target Tracking and Data Fusion in Sensor Networks
- Explainable Artificial Intelligence (XAI)
- Network Security and Intrusion Detection
- Plasma Diagnostics and Applications
- Defense, Military, and Policy Studies
- Neural Networks and Applications
- Adversarial Robustness in Machine Learning
- Data Quality and Management
Defence Science and Technology Laboratory
2011-2024
Ministry of Defence
2019
Defence Equipment and Support
2019
Digital Science Technologies (United States)
2018
Malvern Community Hospital
2008
Princeton Plasma Physics Laboratory
1982-2003
Princeton University
1982-2002
United States National Library of Medicine
2002
General Atomics (United States)
1997
Joint European Torus
1994
Peak fusion power production of 6.2\ifmmode\pm\else\textpm\fi{}0.4 MW has been achieved in TFTR plasmas heated by deuterium and tritium neutral beams at a total 29.5 MW. These have an inferred central alpha particle density 1.2\ifmmode\times\else\texttimes\fi{}${10}^{17}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$ without the appearance either disruptive magnetohydrodynamics events or detectable changes Alfv\'en wave activity. The measured loss rate energetic particles agreed with...
The Tokamak Fusion Test Reactor (TFTR) (R. J. Hawryluk, to be published in Rev. Mod. Phys.) experiments on high-temperature plasmas, that culminated the study of deuterium–tritium D–T plasmas containing significant populations energetic alpha particles, spanned over two decades from conception completion. During design TFTR, key physics issues were magnetohydrodynamic (MHD) equilibrium and stability, plasma energy transport, impurity effects, reactivity. Energetic particle was given less...
The Tomamak Fusion Test reactor has performed initial high-power experiments with the plasma fueled nominally equal densities of deuterium and tritium. Compared to pure plasmas, energy stored in electron ions increased by \ensuremath{\sim}20%. These increases indicate improvements confinement associated use tritium possibly heating electrons \ensuremath{\alpha} particles created D-T fusion reactions.
Making decisions on how best to utilise limited intelligence, surveillance and reconnaisance (ISR) resources is a key issue in mission planning. This requires judgements about which kinds of available sensors are more or less appropriate for specific ISR tasks mission. A methodological approach addressing this kind decision problem the military context Missions Means Framework (MMF), provides structured way analyse terms tasks, assess effectiveness various means accomplishing those tasks....
The main aim of the National Spherical Torus Experiment (NSTX) is to establish fusion physics principles spherical torus (ST) concept. NSTX device began plasma operations in February 1999 and current Ip was successfully brought up design value 1 MA on 14 December 1999. planned shaping parameters, elongation κ = 1.6-2.2 triangularity δ 0.2-0.4, were achieved inner wall limited, single null double diverted configurations. coaxial helicity injection (CHI) high harmonic fast wave (HHFW)...
Recent experiments on the Tokamak Fusion Test Reactor have afforded an opportunity to measure retention of tritium in a graphite limiter that is subject erosion, codeposition, and high neutron flux. The was injected by both gas puff neutral beams. isotopic mix hydrogenic recycling measured spectroscopically fraction T/(H+D+T) transiently increased as 75%. Some pumped out during experimental run some removed subsequent campaign using various clean-up techniques. While short term high,...
We consider the problem of sensor-mission assignment as that allocating a collection intelligence, surveillance and reconnaissance (ISR) assets (including sensors sensor platforms) to set mission tasks in an attempt satisfy ISR requirements those tasks. This is exacerbated coalition context because full range possible solutions not easy obtain at-a-glance. Moreover, operational environment highly dynamic, with frequent changes availability assets. In this paper we describe solution for aims...
Vector Symbolic Architecture (VSA), a.k.a. Hyperdimensional Computing (HDC) has transformative potential for advancing cognitive processing capabilities at the network edge. This paper examines how this paradigm offers robust solutions AI and Autonomy within a future command, control, communications, computers, cyber, intelligence, surveillance reconnaissance (C5ISR) enterprise by effectively modelling processes required to perform Observe, Orient, Decide Act (OODA) loop processing. The...
Abstract TFTR has begun its campaign to study deuterium-tritium fusion under reactor-like conditions. Variable amounts of deuterium and tritium neutral beam power have been used maximize power, alpha heating, investigate particle confinement, search for driven plasma instabilities. Additional areas include energy transport ICRF heating schemes DT plasmas, retention, in high βp plasmas. The majority this work is done the supershot confinement regime. To obtain supershots, extensive limiter...
The well understood lack of a 'silver bullet' sensor technology which can provide everything wanted from Intelligence, Surveillance, Target Acquisition and Reconnaissance (ISTAR) when using single type on platform, combined with the improved ability to network multiple platforms together is at heart growth in networkcentric ISTAR. When this linked data storage capacity then much richer more beneficial opportunity for transformation network-centric ISTAR opens out. In particular long term (at...
The UK Land Open System Architecture (LOSA) is an open, service-based architecture for systems integration and interoperability in the land environment. It being developed order to deliver coherent agile force elements at readiness operations. LOSA affects planning, delivery generation, supports Future Force 2020. This paper will review objectives of progress made date; before focusing on approach achieve plug-and-play ISR assets. has been proposed US DoD Coalition Warfare Program Office as...
This paper describes the joint US & UK International Technology Alliance (ITA) basic research programme in Network and Information Science (NIS), with a particular focus on elements of concerned the processing sensor information and delivery derived intelligence to users. The paper provides view both benefits main challenges being addressed by NIS ITA, on Sensor Processing Delivery (SIPD): SIPD is one four key thrusts within ITA.
This paper set out a number of fundamental challenges to be overcome enable the large volumes data in modern distributed and networked defence information systems (including sensor systems) used support decision making; taking into account trends Information Communications Technology (ICT) associated with bandwidth, storage capacity processing power; as well changing nature (particularly growth informal soft 'sensor' data).
At the beginning of 1990 Tokamak Fusion Test Reactor (TFTR) experimental run, after replacement POCO-AXF-5Q graphite tiles on midplane bumper limiter by carbon fiber composite (CFC) and prior to any pulse discharge cleaning (PDC), boronization was performed. Boronization is deposition a layer boron vacuum vessel inner surface glow in diborane, methane, helium mixture. The amount required substantially reduced compared that which needed previous openings when not done. Previously, major...
Tritium retention and removal are critical issues for the success of ITER or any DT fusion reactor. The Tokamak Fusion Test Reactor, TFTR, is first facility to afford opportunity study tritium over an extended period. In accumulates on all surfaces with line sight plasma by codeposition carbon. Measurements both deuterium fractions have yielded between 0.2 0.6 injected fuel in torus. has been successfully removed from TFTR glow discharge cleaning air purges. in-vessel inventory was reduced a...
A major concern in coalition peace-support operations is the incidence of terrorist activity. In this paper, we propose a generative model for occurrence incidents, and illustrate that an increase diversity, as measured by number different social groups to which individual belongs, inversely correlated with likelihood incident society. one can predict events new contexts, opposed statistical models are used future incidents based on history existing context. Generative be useful planning...
TFTR has been using tritium as a fuel gas part of its Deuterium-Tritium (DT) experimental operations with over 600 kCi processed through the site and 400 injected. Careful inventory accounting measures are required to ensure regulatory safety limits not exceeded. Tritium management is accomplished database system coordinate needs within these limits. A Nuclear Materials Custodian (NMC) oversees Transfer Operations (TTO) accounts based on specific physical locations including product...
The ability to evolve Military Communication and Information Systems (CIS) effectively affordably is enhanced by the adoption of open modular system architectures. However, there are a number issues with actually achieving these benefits in practice. This paper presents results an initial study into blockers achievement systems. In particular, this paper, focuses on associated with: rapidly evolving Communications Technology landscape; commercial approach procurement CIS systems; evolution...