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MOPP047 |
Design and Development of Beam Diagnostics for an FFA-FFA Ring for ISIS-II Upgrade Studies |
214 |
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- E. Yamakawa
JAI, Oxford, United Kingdom
- S. Machida, A. Pertica, C.C. Wilcox
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
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The ISIS-II project aims to deliver a new spallation neu- tron source by 2034, driven by a 1.2 GeV proton accelerator capable of delivering a beam power of 1.25 MW with a rep- etition rate of 50 Hz or higher. One of the options for this future accelerator is a Fixed Field alternating gradient Accelerator (FFA). To demonstrate the suitability of FFAs for use in a user facility such as ISIS, there is a plan to construct a smaller scale proof of concept machine: FETS-FFA. Developing beam diagnostics for the FETS-FFA ring presents a challenge due to a large orbit excursion and aperture ( 60 mm x 700 mm). Diagnostics must cover the full size of beam chamber whilst still providing measurement sensitivity and resolution comparable to that seen in the ISIS synchrotron. This paper presents the current design and development of beam diagnostics for the FETS-FFA ring, including finite element studies of Beam Position Monitors (BPMs) and Ionisation Profile Monitors (IPMs).
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Poster MOPP047 [9.355 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP047
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About • |
paper received ※ 03 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019 |
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TUPP037 |
Studies of the Time Structure of Ionisation Beam Profile Measurements in the ISIS Extracted Proton Beamline |
412 |
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- C.C. Wilcox, W.A. Frank, A. Pertica, R.E. Williamson
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
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Ionisation Profile Monitors (IPMs) are used at the ISIS neutron and muon source to perform non-destructive transverse beam profile measurements. An in-house particle tracking code, combined with 3D CST modelling of the electric fields within the monitors, has been used to improve understanding of the various error sources within the IPMs, and shows close agreement with profile measurements in the synchrotron. To allow for detailed benchmarking studies, an IPM has been installed in Extracted Proton Beamline 1 (EPB1), enabling comparison with secondary emission (SEM) grid measurements. However, the IPM measurements taken in EPB1 show increased levels of profile broadening at operational beam intensities, which are not reproduced by SEM measurements or simulation. To investigate these differences, studies of the time structure of measured profiles are being performed. This paper details the development of new, high-speed multichannel data acquisition electronics, required to perform these studies. Resulting measurements are discussed, along with an analysis of the data¿s time structure and a comparison with that predicted by the IPM code.
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Poster TUPP037 [1.102 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP037
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About • |
paper received ※ 04 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019 |
|
Export • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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