A5009548949- Cryospheric studies and observations
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Winter Sports Injuries and Performance
- Superconducting Materials and Applications
- Geophysics and Gravity Measurements
- Arctic and Antarctic ice dynamics
- GNSS positioning and interference
- Laser-Plasma Interactions and Diagnostics
- Oceanographic and Atmospheric Processes
- Landslides and related hazards
- Soil Moisture and Remote Sensing
- Ocean Waves and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- Adventure Sports and Sensation Seeking
- Photocathodes and Microchannel Plates
- Peacebuilding and International Security
- IPv6, Mobility, Handover, Networks, Security
- Power Line Communications and Noise
- Underwater Vehicles and Communication Systems
- Advanced Surface Polishing Techniques
- Methane Hydrates and Related Phenomena
- Gyrotron and Vacuum Electronics Research
- Magnetic Bearings and Levitation Dynamics
Newcastle University
2014-2024
Diamond Light Source
2008-2018
Institute for Security Studies
2016
Stockholm International Peace Research Institute
2016
Royal Danish Defence College
2016
Stellenbosch University
2016
Queen's University
2016
Norwegian Institute of International Affairs
2016
University of Tübingen
2008
Rutherford Appleton Laboratory
2006
During summer 2013 we installed a network of 19 GPS nodes at the ungrounded margin Helheim Glacier in southeast Greenland together with three cameras to study iceberg calving mechanisms. The collected data rates up every 7 s and was designed be robust loss as glacier calved. Data collection covered 55 days, many survived locations right front time calving. observations included number significant events, consequence retreated ~1.5 km. provide real-time, high-frequency unprecedented proximity...
Abstract To overcome spatial and temporal limitations of sea surface height instruments such as tide gauges, satellite altimetry, Global Navigation Satellite Systems (GNSS) buoys, we investigate the use an unmanned, self‐propelled Wave Glider vehicle equipped with a geodetic GNSS receiver. Centimetric precision instantaneous measurement is demonstrated from 13‐day deployment in North Sea, during which glider traversed track about 600 km. Ellipsoidal heights were estimated at 5 Hz using...
Movers and shakers When the edge of an ice sheet breaks off falls into sea (calves), remaining section moves backward down can suffer a glacial earthquake. Murray et al. studied calving from Greenland's Helheim Glacier. The forces that cause change in motion at its terminus also trigger accompanying earthquakes. Because these seismic signals be detected by instruments located all over globe, it should possible to use earthquakes as proxies for glacier calving. Science , this issue p. 305
This report describes the conceptual design of a proposed free electron laser test facility called CLARA that will be major upgrade to existing VELA accelerator at Daresbury Laboratory in UK. able number new schemes have been but require proof principle experiment confirm they perform as predicted. The primary focus on ultra short photon pulse generation which take lasers into whole regime, enabling area science emerge.
This paper provides an overview of a wide area wireless sensor network that was deployed on the calving front Helheim Glacier in Greenland during summer 2013. The purpose to measure flow rate glacier using accurate satellite positioning data. challenge this extreme environment collect data real time at edge glacier. achieved solar powered 2.4-GHz Zigbee operated novel hybrid cellular/mesh access architecture consisting ice nodes communicating with base stations placed rock adjacent highly...
Abstract A geodetic GPS receiver has been installed on a Wave Glider, an unmanned water surface vehicle. Using kinematic precise point positioning (PPP) GPS, which operates globally without directly requiring reference stations, heights are measured with ~0.05-m precision. The Glider was tested in Loch Ness, Scotland, by measuring the gradient of loch’s height. experiment took place under mild weather, virtually no wind setup along loch and wave field made mostly ripples wavelets. Under...
The correct implementation of the nonlinear lattice model is crucial to achieving design performance in storage rings. We describe here a method for simultaneous correction multiple resonances based on local resonance measurements and numerical fits sextupole components. This has been applied two excited Diamond ring. these achieved with unprecedented precision. also point out that this potential lead an effective reconstruction component errors around whole ring circumference.
Abstract Atmospheric water vapor estimates from static ground-based Global Navigation Satellite System (GNSS) receivers are now operationally assimilated into numerical weather prediction models, either as total precipitable (PWV) or zenith delay. To extend this concept, the estimation of using kinematic GNSS has been investigated for over a decade. Previous PWV studies suggest 2–3-mm measurement agreement with radiosondes, almost commensurate accuracy, but only comprehensive experiments...
Nonlinear beam dynamics plays a crucial role in defining the performance of storage ring. The lifetime, injection efficiency, and dynamic momentum apertures available to are optimized during design phase by proper optimization linear lattice distribution sextupole families. correct implementation model, especially nonlinear part, is nontrivial accelerator physics task. Several parameters can be used compare real machine with model eventually accelerator. Most these extracted from analysis...
Diamond Light Source is in the process of reviewing several lattice options for a potential storage ring upgrade. As part these studies, it has become clear that substantial reduction emittance can be achieved by adopting an on-axis injection scheme, thereby relaxing constraints on dynamic aperture. In order to achieve necessary injected bunch properties this viable, new accumulator would needed. paper we review requirements placed design, describe development and analyse performance...
A low beam emittance lattice has been designed for up-grade of the Diamond storage ring. Due to use strong focusing elements and rather small vacuum cham-ber considering required short dark time, commis-sioning ring becomes very chal-lenging. This paper briefly explains progress early commissioning simulations ring, gives engineering tolerances, presents first simula-tion results discusses non-linear dynamics (NLBD) issues after successful with without insertion devices (IDs).
The Diamond Storage Ring (SR) has been in operation since January 2007. This paper summarises a number of measurementsthat have made over that periodto monitor the SR stability height and position including general survey, Hydrostatic Levelling System (HLS), horizontal vertical magnet corrector strengths as well Radio Frequency(RF)measurementsthathavegivenanindication changing circumference.