| Paper |
Title |
Page |
| TUPAN113 |
Injection Studies on the ISIS Synchrotron
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1640 |
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- B. Jones, D. J. Adams, C. M. Warsop
STFC/RAL/ISIS, Chilton, Didcot, Oxon
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The ISIS Facility at the Rutherford Appleton Laboratory in the UK produces intense neutron and muon beams for condensed matter research. It is based on a 50 Hz proton synchrotron which, once the commissioning of a new dual harmonic RF system is complete, will accelerate about 3.5·1013 protons per pulse from 70 to 800 MeV, corresponding to mean beam powers of 0.2 MW. The multi-turn charge-exchange injection process strongly affects transverse beam distributions, space charge forces, beam loss and therefore operational intensity. The evolution of longitudinal distributions and subsequent trapping efficiency is also intimately linked with injection. Optimising injection is therefore a key consideration for present and future upgrades. Work is now under way looking at this process in more detail, and relates closely to other transverse space charge studies on the ring. This paper presents work including: space charge simulations of the present machine and comparison with observations; assessment of related loss mechanisms; and study of optimal painting schemes. Plans and preparations for more detailed experimental work are also summarised.
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| THPMN076 |
PAMELA - A Model for an FFAG based Hadron Therapy Machine
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2880 |
| |
- J. K. Pozimski
Imperial College of Science and Technology, Department of Physics, London
- R. J. Barlow
UMAN, Manchester
- J. Cobb, T. Yokoi
OXFORDphysics, Oxford, Oxon
- B. Cywinski
University of Leeds, Leeds
- T. R. Edgecock
STFC/RAL, Chilton, Didcot, Oxon
- A. Elliott
Beatson Institute for Cancer Research, Glasgow
- M. Folkard, B. Vojnovic
Gray Cancer Institute, Northwood, Middlesex
- I. S.K. Gardner
STFC/RAL/ISIS, Chilton, Didcot, Oxon
- B. Jones
University Hospital Birmingham, Edgbaston, Birmingham
- K. Kirkby, R. Webb
UOSIBS, Guildford
- G. McKenna
University of Oxford, Oxford
- K. J. Peach
JAI, Oxford
- M. W. Poole
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
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Approximately one third of the world?s 15000 accelerators are used for tumour therapy and other medical applications. Most of these are room temperature cyclotrons: a few are synchrotrons. Neither of these have ideal characteristics for a dedicated medical accelerator. The characteristics of FFAGs make them ideally suited to such applications, as the much smaller magnet size, greater compactness and variable energy offers considerable cost and operational benefits especially in a hospital setting. In the first stage the work on PAMELA will focus on the optimization of the FFAG design to deliver the specific machine parameters demanded by therapy applications. In this phase of the PAMELA project the effort will concentrate on the design of a semi-scaling type FFAGs to deliver a 450 MeV/u carbon ion beam, including detailed lattice and tracking studies. The second stage will use the existing expertise in the BASROC consortium to undertake a design of the magnets and RF system for PAMELA. An outline of the overall concept of PAMELA will be discussed and the actual status of the work will be presented.
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