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| TUPAS002 |
RFQ Cold Model RF Measurements and Waveguide-to-Coaxial line Transition Design for the Front-End Test Stand at RAL
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1655 |
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- Y. A. Cheng
- A. Kurup, P. Savage
Imperial College of Science and Technology, Department of Physics, London
- A. P. Letchford
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- J. K. Pozimski
STFC/RAL, Chilton, Didcot, Oxon
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A 324MHz four vane RFQ cold model has been built, as part of the development of a proton driver front end test stand at the Rutherford Appleton Laboratory (RAL) in the UK. This paper will present the results of RF measurements performed on the cold model, which include analysis of resonant modes, Q-value measurements and electric field profile measurements using a bead-pull perturbation method. These measurements were done before and after brazing of the four vanes and the results were compared to Microwave Studio simulations. Additionally a tuner has been designed, built and tested and the results will be presented together with the electromagnetic design of waveguide-to-coaxial line transition structures for the four vane RFQ.
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| TUPAN111 |
Status Report on the RAL Front End Test Stand
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1634 |
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- J. K. Pozimski
- J. Alonso, R. Enparantza
Fundacion Tekniker, Elbr (Guipuzkoa)
- J. J. Back
University of Warwick, Coventry
- J. Bermejo
Bilbao, Faculty of Science and Technology, Bilbao
- Y. A. Cheng, S. Jolly, A. Kurup, P. Savage
Imperial College of Science and Technology, Department of Physics, London
- M. A. Clarke-Gayther, A. Daly, D. C. Faircloth, A. P. Letchford
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- C. Gabor, D. C. Plostinar
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
- J. Lucas
Elytt Energy, Madrid
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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 and the University of Warwick. 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 regimes. This paper describes the status of the RAL Front End Test Stand which consists of five main components: a 60 mA H- ion source, a low energy beam transport, a 324 MHz Radio Frequency Quadrupole accelerator, a high speed beam chopper and a comprehensive suite of diagnostics. The aim is to demonstrate production of a 60 mA, 2 ms, 50 pps, chopped H- beam at 3 MeV.
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