| Paper |
Title |
Page |
| WEPC157 |
A Hybrid Quadrupole Design for the RAL Front End Test Stand (FETS)
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2377 |
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- D. C. Plostinar, M. A. Clarke-Gayther
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- P. Davis
STFC/RAL, Chilton, Didcot, Oxon
- S. J.S. Jago
STFC/RAL/ISIS, Chilton, Didcot, Oxon
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The Front End Test Stand project being constructed at Rutherford Appleton Laboratory (RAL) aims to deliver a high current (60 mA) H- chopped ion beam, at 3 MeV and 50 pps. The main components of FETS are the H- ion source, the Low Energy Beam Transport line (LEBT), the Radio Frequency Quadrupole (RFQ) and the Medium Energy Transport (MEBT) line with beam chopper. Space restrictions in the MEBT line place constraints on component length and drive the requirement to identify compact component configurations. A description is given of a novel compact hybrid quadrupole magnet, whose design is based on the concentric combination of a permanent magnet quadrupole (PMQ) and a laminar conductor electromagnetic quadrupole (EMQ). Simulations of magnetic field distribution in 2 and 3D are presented, and possible applications and further developments are discussed.
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| THPP083 |
Megawatt Upgrades for the ISIS Facility
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3554 |
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- J. W.G. Thomason, D. J. Adams, D. J.S. Findlay, I. S.K. Gardner, B. Jones, A. P. Letchford, S. J. Payne, B. G. Pine, A. Seville, C. M. Warsop, R. E. Williamson
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- D. C. Plostinar, C. R. Prior, G. H. Rees
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
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ISIS is the spallation neutron source at the Rutherford Appleton Laboratory in the UK. Presently, it runs at beam powers of 0.2 MW, with upgrades in place to supply increased powers for the new Second Target Station due to start operation in autumn 2008. This paper outlines schemes for major upgrades to the facility in the megawatt regime, with options for 1, 2 and 5 MW. The ideas centre around new 3.2 GeV RCS designs that can be employed to increase the energy of the existing ISIS beam to provide powers of ~1 MW or, possibly as a second upgrade stage, accumulate and accelerate beam from a new 0.8 GeV linac for 2-5 MW beams. Summaries of ring designs are presented, along with studies and simulations to assess the key loss mechanisms that will impose intensity limitations. Important factors include injection, RF systems, instabilities, longitudinal and transverse space charge.
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| THPP029 |
Status of the RAL Front End Test Stand
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3437 |
| |
- A. P. Letchford, M. A. Clarke-Gayther, D. C. Faircloth, D. J.S. Findlay, S. R. Lawrie, P. Romano, P. Wise
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- S. M.H. Al Sari, S. Jolly, A. Kurup, D. A. Lee, P. Savage
Imperial College of Science and Technology, Department of Physics, London
- J. Alonso, R. Enparantza
Fundación Tekniker, Elbr (Guipuzkoa)
- J. J. Back
University of Warwick, Coventry
- F. J. Bermejo
Bilbao, Faculty of Science and Technology, Bilbao
- C. Gabor, D. C. Plostinar
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- J. Lucas
Elytt Energy, Madrid
- J. Pasternak, J. K. Pozimski
STFC/RAL, Chilton, Didcot, Oxon
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High power proton accelerators (HPPAs) with beam powers in the several megawatt range have many applications including drivers for spallation neutron sources, neutrino factories, waste transmuters and tritium production facilities. The UK's commitment to the development of the next generation of HPPAs is demonstrated by a test stand being constructed in collaboration between RAL, Imperial College London, the University of Warwick and the Universidad del Pais Vasco, Bilbao. The aim of the RAL Front End Test Stand is to demonstrate that chopped low energy beams of high quality can be produced and is intended to allow generic experiments exploring a variety of operational conditions. This paper describes the current status of the RAL Front End Test Stand.
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