| Paper | Title | Other Keywords | Page |
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| MOPOPT034 | Surrogate-Based Bayesian Inference of Transverse Beam Distribution for Non-Stationary Accelerator Systems | controls, experiment, framework, simulation | 324 |
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| Constraints on the beam diagnostics available in real-time and time-varying beam source conditions make it difficult to provide users with high-quality beams for long periods without interrupting experiments. Although surrogate model-based inference is useful for inferring the unmeasurable, the system states can be incorrectly inferred due to manufacturing errors and neglected higher-order effects when creating the surrogate model. In this paper, we propose to adaptively assimilate the surrogate model for reconstructing the transverse beam distribution with uncertainty and underspecification using a sequential Monte Carlo from the measurements of quadrant beam loss monitors. The proposed method enables sample-efficient and training-free inference and control of the time-varying transverse beam distribution. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOPOPT034 | ||
| About • | Received ※ 19 May 2022 — Accepted ※ 13 June 2022 — Issue date ※ 17 June 2022 | ||
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| MOPOTK011 | Generalisation and Longitudinal Extension of the Genetic Lattice Construction (GLC) Algorithm | simulation, quadrupole, lattice, space-charge | 453 |
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| The GLC algorithm allows the construction of efficient transfer lines with defined imaging properties using a minimum number of quadrupole elements. This work describes a generalization of this algorithm to make it applicable to the use of arbitrary beam optical elements. This includes an extension to longitudinal phase space. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-MOPOTK011 | ||
| About • | Received ※ 18 May 2022 — Revised ※ 12 June 2022 — Accepted ※ 13 June 2022 — Issue date ※ 01 July 2022 | ||
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| TUPOPT051 | Reconstruction and Beam-Transport Study of the cERL Dump Line for High-Power IR-FEL Operation | FEL, cavity, operation, electron | 1117 |
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Funding: This work is supported by a NEDO project "Development of advanced laser processing with intelligence based on high-brightness and high-efficiency laser technologies." A significant FEL pulse energy was successfully generated at the cERL IR-FEL in Burst mode where a macro pulse of about 1 microsecond or less is repeated at the maximum frequency of 5 Hz. In the next step, high-power FEL operation in CW mode should be carried out with energy recovery by increasing electron bunches drastically. However, momentum spread of the electron beam increases due to the FEL-light emission and the space charge effects and may cause serious beam loss by exceeding the momentum acceptance of the cERL downstream of the FEL. Therefore, we reconstructed the dump line in Autumn 2020 in order to greatly increase the momentum acceptance with improvement of the beam-tuning flexibility. Then we performed the beam-transport study of the reconstructed dump line in March 2021 by injecting the beam directly from the injector without passing the recirculation loop. In this paper, we present the reconstructed dump line and the beam-transport study. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT051 | ||
| About • | Received ※ 16 May 2022 — Revised ※ 11 June 2022 — Accepted ※ 12 June 2022 — Issue date ※ 13 June 2022 | ||
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| THPOST035 | Status of the Engineering Design of the IFMIF-DONES High Energy Beam Transport Line and Beam Dump System | vacuum, target, diagnostics, neutron | 2520 |
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Funding: Work performed within framework of EUROfusion Consortium, funded by European Union via Euratom Research & Training Programme (Grant Agreement 101052200’EUROfusion). Views & opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither European Union nor European Commission can be held responsible for them. IFMIF-DONES plant (International Fusion Materials Irradiation Facility ’ DEMO Oriented Neutron Source) will be an installation located in the south of Spain at Granada. Its objective is the fusion material testing by the generation of a neutron flux with a broad energy distribution covering the typical neutron spectrum of a (D-T) fusion reactor. This is achieved by the Li(d, xn) nuclear reactions occurring in a liquid lithium target where a 40 MeV at 125 mA deuteron beam with a variable rectangular beam footprint between 100mm x 50mm and 200mm x 50mm collides. The accelerator system is in charge of providing such high energy deuterons in order to produce the required neutron flux. The High Energy Beam Transport line is the last subsystem of the IFMIF-DONES accelerator and its main functions are to guide the deuteron beam towards the liquid lithium target and to shape it with the required rectangular reference beam footprint. The present work details the status of the HEBT engineering design, including beam dynamics, vacuum configuration, radioprotection, beam diagnostics devices and remote handling analyses performed detailing the layout and integration. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THPOST035 | ||
| About • | Received ※ 19 May 2022 — Revised ※ 10 June 2022 — Accepted ※ 13 June 2022 — Issue date ※ 14 June 2022 | ||
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| THPOMS051 | Study on Construction of an Additional Beamline for a Compact Neutron Source Using a 30 Mev Proton Cyclotron | neutron, target, proton, cyclotron | 3087 |
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| The Institute for Integrated Radiation and Nuclear Science, Kyoto University (KURNS) has been actively using neutrons extracted from the research reactor (KUR) for collaborative research. Since the operation of KUR is scheduled to be terminated in 2026 according to the current reactor operation plan, the development of a general-purpose neutron source using the 30 MeV proton cyclotron (HM-30) installed at KURNS for Boron Neutron Capture Therapy (BNCT) research has been discussed as an alternative neutron source. In this presentation, we report on the conceptual design of an additional beamline for a compact neutron source using this cyclotron. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THPOMS051 | ||
| About • | Received ※ 20 May 2022 — Revised ※ 15 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 18 June 2022 | ||
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