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The Cockcroft Institute is an international centre for Accelerator Science and Technology in the UK. It was proposed in September 2003 and officially opened in September 2006. It is a joint venture of Lancaster University, the University of Liverpool, the University of Manchester, the Science and Technology Facilities Council, and the Northwest Regional Development Agency. The Institute is located in a purpose-built building on the Daresbury Laboratory campus, and in centres in each of the participating universities.The Institute's aim is to provide the intellectual focus, educational infrastructure, and the essential scientific and technological facilities for Accelerator Science and Technology research and development, which will enable UK scientists and engineers to take a major role in accelerator design, construction, and operation for the foreseeable future. The Institute is named after the Nobel prizewinner Sir John Cockcroft FRS.The present director of the Cockcroft Institute is Swapan Chattopadhyay. Wikipedia.

Owen H.,Cockcroft Institute | Williams P.H.,Daresbury Laboratory | Stevenson S.,University of Oxford
Physical Review Letters | Year: 2013

Electron storage rings used for the production of synchrotron radiation (SR) have an output photon brightness that is limited by the equilibrium beam emittance. By using interleaved injection and ejection of bunches from a source with repetition rate greater than 1 kHz, we show that it is practicable to overcome this limit in rings of energy ∼1 GeV. Sufficiently short kicker pulse lengths enable effective currents of many milliamperes, which can deliver a significant flux of diffraction-limited soft x-ray photons. Thus, either existing SR facilities may be adapted for nonequilibrium operation, or the technique applied to construct SR rings smaller than their storage ring equivalent. Published by American Physical Society. Source

Barlow R.J.,University of Huddersfield | Barlow R.J.,Cockcroft Institute
Nuclear Physics B - Proceedings Supplements | Year: 2011

Lepton Flavour violation is predicted by many theories beyond the standard model. In the muon sector such a violation entails not only direct μ→eγ decay but also the conversion process μ→e. To measure this to high precision requires a large number of muons of very similar energy, and this is difficult to achieve from a muon target with conventional beam optics. PRISM is an FFAG system designed to accept large numbers of muons (1012/sec) with a wide range of energies, and render them monochromatic by accelerating the less energetic muons and decelerating the more energetic ones. To preserve Liouville's theorem, this is accompanied by a broadening in the timing of the muons, hence the name 'Phase Rotated Intense Slow Muon source.' The principles of this device have been demonstrated and components prototyped. PRIME is a detector (PRISM Muon Electron Conversion) which has been designed to stop 20 MeV bunches of muons in a thin foil, giving a very clean signal and reaching a background sensitivity of 10-18, four orders of magnitude better than today's limits and probing the interesting region for BSM theories. © 2011 Elsevier B.V. Source

Papash A.I.,Max Planck Institute for Nuclear Physics | Papash A.I.,Karlsruhe Institute of Technology | Smirnov A.V.,Max Planck Institute for Nuclear Physics | Welsch C.P.,Cockcroft Institute
Physical Review Special Topics - Accelerators and Beams | Year: 2013

Electrostatic storage rings operate at very low energies in the keV range and have proven to be invaluable tools for atomic and molecular physics. Because of the mass independence of electric rigidity, these machines are able to store a wide range of different particles, from light ions to heavy singly charged biomolecules, opening up unique research opportunities. However, earlier measurements have shown strong limitations in maximum beam intensity, fast decay of the stored ion current, and reduced beam lifetime. The nature of these effects has not been fully understood and an improved understanding of the physical processes influencing beam motion and stability in such rings is needed. In this paper, a comprehensive study into nonlinear and long-term beam dynamics studies is presented on the examples of a number of existing and planned electrostatic storage rings using the BETACOOL, OPERA-3D, and MAD-X simulation software. A detailed investigation into ion kinetics, under consideration of effects from electron cooling and multiple scattering of the beam on a supersonic gas jet target, is carried out and yields a consistent explanation of the physical effects in a whole class of storage rings. The lifetime, equilibrium momentum spread, and equilibrium lateral spread during collisions with the target are estimated. In addition, the results from experiments at the Test Storage Ring, where a low-intensity beam of CF + ions at 93 keV/u has been shrunk to extremely small dimensions, are reproduced. Based on these simulations, the conditions for stable ring operation with an extremely low-emittance beam are presented. Source

Carter R.G.,Cockcroft Institute
IEEE Transactions on Electron Devices | Year: 2010

A simple method for modeling the performance of an inductive output tube (IOT) is described. The model reproduces the characteristics of an IOT with good accuracy over the full dynamic range of the tube. © 2006 IEEE. Source

Owen H.,Cockcroft Institute | MacKay R.,Christie NHS Foundation Trust | Peach K.,University of Oxford | Smith S.,Accelerator Centre
Contemporary Physics | Year: 2014

Over the last twenty years the treatment of cancer with protons and light nuclei such as carbon ions has moved from being the preserve of research laboratories into widespread clinical use. A number of choices now exist for the creation and delivery of these particles, key amongst these being the adoption of pencil beam scanning using a rotating gantry; attention is now being given to what technologies will enable cheaper and more effective treatment in the future. In this article the physics and engineering used in these hadron therapy facilities is presented, and the research areas likely to lead to substantive improvements. The wider use of superconducting magnets is an emerging trend, whilst further ahead novel high-gradient acceleration techniques may enable much smaller treatment systems. Imaging techniques to improve the accuracy of treatment plans must also be developed hand-in-hand with future sources of particles, a notable example of which is proton computed tomography. © 2014 Crown Copyright 2014. Reproduced with the permission of the Controller of Her Majesty's Stationery Office and the Science and Technology Facilities Council. Source

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