| Paper |
Title |
Page |
| TUPGW076 |
Early Commissioning Simulation of the Diamond Storage Ring Upgrade |
1577 |
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- H. Ghasem, M. Apollonio, R. Bartolini, J.P. Kennedy, I.P.S. Martin
DLS, Oxfordshire, United Kingdom
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A low beam emittance lattice has been designed for up-grade of the Diamond storage ring. Due to the use of strong focusing elements and rather small vacuum cham-ber and considering the required short dark time, commis-sioning of the designed storage ring becomes very chal-lenging. This paper briefly explains the progress of early commissioning simulations of the storage ring, gives the required engineering tolerances, presents the first simula-tion results and discusses the non-linear beam dynamics (NLBD) issues after successful commissioning with and without insertion devices (IDs).
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-TUPGW076
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| About • |
paper received ※ 13 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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| WEPMP042 |
Reduction of Stored Beam Oscillations During Injection at Diamond Light Source |
2426 |
| |
- R.T. Fielder, M. Apollonio, R. Bartolini, C. Bloomer, I.P.S. Martin
DLS, Oxfordshire, United Kingdom
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At Diamond injection is performed by means a of a four kicker off-axis system, relying on a perfect timing and amplitude setting to produce a closed bump. Ageing of some of the kicker vessel components has progressively spoiled the performance of the system, causing oscillations in the stored beam. Various schemes to control these oscillations have been considered including introducing an additional compensating kicker, and installing a non-linear injection kicker. Results of simulations analysing these schemes are presented, along with measurements taken in the storage ring using an existing pinger magnet. The effects of the reduction on the quality of beam seen by beamlines is also considered.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEPMP042
|
|
| About • |
paper received ※ 14 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019 |
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| THPGW071 |
Genetic Optimisation of Beamline Design for DIAMOND |
3753 |
| |
- F. Bakkali Taheri, M. Apollonio, R. Bartolini, B. Singh
DLS, Oxfordshire, United Kingdom
- R. Bartolini, J. Li
JAI, Oxford, United Kingdom
- R. Bartolini
Oxford University, Physics Department, Oxford, Oxon, United Kingdom
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The problem of optimisation of beamline structures is studied, from the point of view of multi-objective genetic algorithms. While this approach has been successfully used in the exploration of potential particle accelerator lattices, it has never been applied to beamline design. In this paper, the Non-Dominated Sorting Genetic Algorithm II (NGSA II) is used to optimize a structure where photons are assumed to propagate through the optical elements according to the wavefront model as implemented in SRW. It is shown that appropriate objective functions can help to set up an interesting set of parameters, with competitive computational resources compared to the traditional approach. Examples illustrating this optimization method are shown in the context of DIAMOND.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPGW071
|
|
| About • |
paper received ※ 13 May 2019 paper accepted ※ 18 May 2019 issue date ※ 21 June 2019 |
|
| Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
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| |