Paper |
Title |
Page |
MOPC142 |
Study of the Post Extraction Acceleration Gap in the ISIS H- Penning Ion Source
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406 |
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- D. C. Faircloth, M. Whitehead, T. Wood
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- C. Gabor
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- J. K. Pozimski
STFC/RAL, Chilton, Didcot, Oxon
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The RAL Front End Test Stand (FETS) is being constructed to demonstrate a chopped H- beam of up to 60 mA at 3 MeV with 50 pps and sufficiently high beam quality for future high-power proton accelerators (HPPA). The injection energy into the RFQ will be in the range of 50 to 70 keV whereas the standard ISIS H- Penning ion source operates at 35 keV, therefore the post extraction acceleration voltage must be increased. In order to finalise the design of the FETS post extraction system, a study is conducted on the Ion Source Development Rig (ISDR) at ISIS. This study shows how beam transport is affected by different post extraction acceleration voltages and gap lengths. Beam, current, profile and emittance measurements are presented along with theoretical calculations.
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MOPC144 |
Installation of the Front End Test Stand High Performance H- Ion Source at RAL
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412 |
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- D. C. Faircloth, M. H. Bates, S. R. Lawrie, A. P. Letchford, M. Perkins, M. E. Westall, M. Whitehead, P. Wise, T. Wood
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- C. Gabor
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- J. K. Pozimski, P. Savage
Imperial College of Science and Technology, Department of Physics, London
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The RAL Front End Test Stand (FETS) is being constructed to demonstrate a chopped H- beam of up to 60 mA at 3 MeV with 50 pps and sufficiently high beam quality for future high-power proton accelerators (HPPA). This paper details the first stage of construction- the installation of the ion source.
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TUPC058 |
Laser-based Ion Beam Diagnostics for the Front End Test Stand at RAL
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1188 |
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- D. A. Lee, J. K. Pozimski
Imperial College of Science and Technology, Department of Physics, London
- C. Gabor
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
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The RAL Front End Test Stand is being constructed to demonstrate that a chopped H- beam of 60 mA at 3 MeV with 50 pps and sufficiently high beam quality as required for future high-power proton accelerators can be produced. Because of the high beam power and a preference for online beam monitoring non-intrusive, non-destructive beam diagnostics are desirable. Two novel instruments, based on the photo-detachment of the outer electron of the H- ions with a laser, are being developed to precisely determine the transverse beam density distribution and the beam emittance at full beam power. This paper discusses the proposed experimental layout of the devices and the progress that has been made towards realizing them. The design of the optical system is presented along with measurements of the laser beam propagation for the beam density distribution experiment. Investigations of the influence of laser beam misalignment along with measurements of the positioning accuracy of movable stages that will be used are given in light of the total expected errors.
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THPP029 |
Status of the RAL Front End Test Stand
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3437 |
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- 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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