Demonstration of slow extraction loss reduction with the application of octupoles at the CERN Super Proton Synchrotron

Fraser, Matthew; Goddard, B.; Kain, V.; Pari, M.; Velotti, Francesco; Stoel, Linda; Benedikt, Michael

doi:10.1103/physrevaccelbeams.22.123501

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…The results described in this paper complement several other reports [9][10][11] on recent developments in slow extraction which have been investigated and demonstrated experimentally at CERN's SPS.…”

Section: Introductionsupporting

confidence: 86%

Reduction of 400 GeV/c slow extraction beam loss with a wire diffuser at the CERN Super Proton Synchrotron

Goddard

Balhan

Borburgh

et al. 2020

Phys. Rev. Accel. Beams

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Slow extraction of a quasicontinuous flux of high-energy protons is an important requirement for many high-energy physics experiments. This extraction type is associated with an unavoidable beam loss due to scattering on the thin septum element. The energy deposition of scattering products and resulting activation place performance limits on existing and planned high-power, high-energy fixed-target proton facilities. In the 400 GeV=c Super Proton Synchrotron (SPS) at CERN, a diffuser (or prescatterer), comprising an array of dense wires or ribbon located upstream of the electrostatic septum, has been designed to reduce absolute losses on the septum wires. As part of a concerted effort to investigate loss reduction techniques in the SPS in view of new physics experiments, the diffuser concept was explored in numerical simulation and analytically. A prototype device has been designed, built, installed, and tested in the SPS to prove the feasibility and quantify the performance reach. In this paper, the diffuser concept is briefly recalled and design considerations for the SPS use case are presented, with the analytical considerations and simulation studies for the optimization of the material and geometry. The device design is described, and the experimental results with a beam are presented and analyzed. The results are discussed, and an outlook is given for the operational feasibility and maximum obtainable performance gain. Conclusions are drawn on the implications for the application of the concept.

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Section: Introductionsupporting

confidence: 86%

Reduction of 400 GeV/c slow extraction beam loss with a wire diffuser at the CERN Super Proton Synchrotron

Goddard

Balhan

Borburgh

et al. 2020

Phys. Rev. Accel. Beams

Self Cite

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“…Other techniques based on machine optics have also been investigated. In particular, first tests of octupole-based separatrix folding have shown a loss reduction of ∼ 40% at the electrostatic septum [56]. Long-standing efforts of reduction of the slow extraction losses are being undertaken at a global scale (e.g.…”

Section: Extraction and Monitoring Of Primary Protonsmentioning

confidence: 99%

Design and diagnostics of high-precision accelerator neutrino beams

Charitonidis,

Longhin,

Pari

et al. 2021

Preprint

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Neutrino oscillation physics has entered a new precision era, which poses major challenges to the level of control and diagnostics of the neutrino beams. In this paper, we review the design of high-precision beams, their current limitations, and the latest techniques envisaged to overcome such limits. We put emphasis on "monitored neutrino beams" and advanced diagnostics to determine the flux and flavor of the neutrinos produced at the source at the per-cent level. We also discuss ab-initio measurements of the neutrino energy -i.e. measurements performed without relying on the event reconstruction at the ν detector -to remove any flux induced bias in the determination of the cross sections.

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“…Despite these limitations and motivated by the worldwide scarcity of VHE ion irradiation facilities and the increasing demand, CERN decided to continue working towards increasing the readiness level for radiation effect testing of its in-house ion irradiation capabilities with technical and financial support from the European Space Agency (ESA). The CHIMERA ("CHARM High-energy Ions for Micro Electronics Reliability Assurance") activity was launched in 2020 and implemented through a short 2-day run in 2021, a 7-day run in 2022, and a few hours repeatability run in 2023 [15]- [17].…”

Section: Introductionmentioning

confidence: 99%

CHARM High-Energy Ions for Microelectronics Reliability Assurance (CHIMERA)

Bilko,

Alía,

Costantino

et al. 2024

IEEE Trans. Nucl. Sci.

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We present the progress related to CERN's capacity of delivering highly penetrating, high-LET heavy ions for radiation effect testing of electronic components within the CHIMERA (CHARM High-energy Ions for Micro Electronics Reliability Assurance) project. Profiting from the existing accelerator infrastructure, Monte Carlo simulations and a 300 µm-thick silicon diode, we highlight the beam characterization capabilities and a summary of the beam properties. Finally, we present the comparison of the SRAM SEE cross-section measurements with respect to other heavy ion facilities.

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Demonstration of slow extraction loss reduction with the application of octupoles at the CERN Super Proton Synchrotron

Cited by 8 publications

References 6 publications

Reduction of 400 GeV/c slow extraction beam loss with a wire diffuser at the CERN Super Proton Synchrotron

Reduction of 400 GeV/c slow extraction beam loss with a wire diffuser at the CERN Super Proton Synchrotron

Design and diagnostics of high-precision accelerator neutrino beams

CHARM High-Energy Ions for Microelectronics Reliability Assurance (CHIMERA)

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