Title |
Lattice and Component Design for the Front End Test Stand MEBT at RAL |
Authors |
- M. Aslaninejad, J.K. Pozimski, P. Savage
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
- M.A. Clarke-Gayther, A.P. Letchford, D.C. Plostinar
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
- S.R. Lawrie
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
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Abstract |
The Front End Test Stand (FETS) linear accelerator at Rutherford Appleton laboratory (RAL) will accelerate a 60 mA, 2 ms, 50 pps H⁻ beam to 3MeV. The aim of FETS is to demonstrate perfect chopping using a novel 2 stage (fast / slow) chopper scheme. The beam chopper and associated beam dumps are located in the MEBT. Achieving a low emittance-growth under the influence of strong, non-linear space-charge forces in a lattice which has to accommodate the long chopping elements is challenging. The baseline FETS MEBT design is 4.3 m long and contains 7 quadrupoles, 3 rebunching cavities, a fast and slow chopper deflector and two beam dumps. In particle dynamics simulations using a distribution from an RFQ simulation as input, beam loss for the un-chopped beam is below 1% while the chopping efficiency is >99 % in both choppers. The final MEBT lattice chosen for FETS will be presented together with particle tracking results and design details of the beam line components.
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Paper |
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Conference |
IPAC2014, Dresden, Germany |
Series |
International Particle Accelerator Conference (5th) |
Proceedings |
Link to full IPAC2014 Proccedings |
Session |
Poster Session, Ronaldo Area |
Date |
17-Jun-14 16:00–18:00 |
Main Classification |
05 Beam Dynamics and Electromagnetic Fields |
Sub Classification |
D01 Beam Optics - Lattices, Correction Schemes, Transport |
Keywords |
quadrupole, rfq, simulation, lattice, emittance |
Publisher |
JACoW Publishing, Geneva, Switzerland |
Editors |
Christine Petit-Jean-Genaz (CERN, Geneva, Switzerland); Gianluigi Arduini (CERN, Geneva, Switzerland); Peter Michel (HZDR, Dresden, Germany); Volker RW Schaa (GSI, Darmstadt, Germany) |
ISBN |
978-3-95450-132-8 |
Published |
July 2014 |
Copyright |
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