| Paper |
Title |
Page |
| MOPCH112 |
The RAL Front End Test Stand
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303 |
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- A.P. Letchford, M.A. Clarke-Gayther, D.C. Faircloth, D.C. Plostinar, J.K. Pozimski
CCLRC/RAL, Chilton, Didcot, Oxon
- J.J. Back
University of Warwick, Coventry
- Y.A. Cheng, S. Jolly, A. Kurup, P. Savage
Imperial College of Science and Technology, Department of Physics, London
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High power proton accelerators (HPPAs) with beam powers in the megawatt range have many possible applications including drivers for spallation neutron sources, neutrino factories, waste transmuters and tritium production facilities. These applications typically propose beam powers of 5 MW or more compared to the highest beam power achieved from a pulsed proton accelerator in routine operation of 0.16 MW at ISIS. 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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| MOPCH116 |
Electromagnetic Design of a Radio Frequency Quadrupole for the Front End Test Stand at RAL
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315 |
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- A. Kurup
Imperial College of Science and Technology, Department of Physics, London
- A.P. Letchford
CCLRC/RAL/ISIS, Chilton, Didcot, Oxon
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The goal of the RAL front end test stand is to demonstrate cleanly chopped bunches of a 60mA H- ion beam at 3MeV. The acceleration of the H- ions from 65keV to 3MeV will be done using a radio frequency quadrupole (RFQ) operating at a resonant frequency of 324MHz. The two types of RFQ considered were a 4-vane and a 4-rod. The 4-vane has a higher Q-value but the post-production adjustment is limited. The 4-rod design is easier to manufacture but requires complicated cooling at 324MHz. The results of electromagnetic simulations using CST Microwave Studio are presented for the 4-vane type and 4-rod type RFQ.
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