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ATS Notes

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2026-06-19
16:53
Beam splitting in CERN North Area transfer lines on the SFTPRO cycle / Gorn, Aleksandr ; Banerjee, Dipanwita (CERN) ; Agricola, Johannes Bernhard ; Fraser, Matthew Alexander (CERN) ; Metzger, Fabian ; Nevay, Laurence James (CERN) ; Stummer, Florian Wolfgang ; Dal Maso, Giovanni ; Van Dijk, Maarten (CERN) ; Velotti, Francesco Maria (CERN)
This note describes SFTPRO beam parameters at the CERN North Area targets for typical user sharing ratios..
CERN-ACC-NOTE-2026-0008. - 2026
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2026-05-04
15:12
LHC Magnetic Model Revisited: Beam-Based Measurements and Machine Reproducibility at Injection / Wanczyk, Joanna ; Fiscarelli, Lucio (CERN) ; Hostettler, Michi (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Trad, Georges (CERN) ; Wenninger, Jorg (CERN)
The harmonic components of the LHC superconducting magnets exhibit a characteristic decay at low field, primarily caused by current redistribution within the superconducting cables, inducing dynamic changes in the beam tune and chromaticity during the injection plateau. [...]
CERN-ACC-NOTE-2026-0007. - 2026

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2026-04-24
15:11
Short Summaries of the ATS Seminars in 2025 / Metral, Elias (CERN) ; Dallocchio, Alessandro (CERN) ; Stora, Thierry (CERN) ; Sublet, Alban (CERN)
Thirteen ATS seminars took place in 2025 (https://indico.cern.ch/category/2725/). [...]
CERN-ACC-NOTE-2026-0006. - 2026
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2026-04-24
11:25
Correctability of Measured Quadrupole Errors in the New Separation Dipoles on the HL-LHC Optics with a Local Skew Quadrupole Corrector / Dilly, Joschua Werner ; Maclean, Ewen Hamish (CERN) ; Tomas Garcia, Rogelio (CERN)
In this study the correctability of the skew quadrupole field errors, as measured in one of the fabricated separation dipoles for the low-beta* insertion regions of the HL-LHC, by means of a locally installed skew quadrupole magnet is evaluated. [...]
CERN-ACC-NOTE-2026-0005. - 2026
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2026-04-07
13:56
Longitudinal optimization of parasitic beams in the CERN Proton Synchrotron / Smedt, Oliver Muller (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Charbon, Edoardo (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Damerau, Heiko (CERN) ; Lasheen, Alexandre (CERN)
Production of beam for the EAST area experimental facility at CERN requires the acceleration of a low intensity particle bunch in the Proton Synchrotron (PS). [...]
CERN-ACC-NOTE-2026-0004. - 2026 - 52.

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2026-03-05
16:25
GPU accelerated Longitudinal Tomography / Abreu Figueiredo, Bernardo (Universitaet Aachen (DE)) ; Albright, Simon (CERN)
Longitudinal phase space tomography is a diagnostic tool deployed in all of the CERN synchrotrons, especially in the accelerators of the PS complex [...]
CERN-ACC-NOTE-2026-0003. - 2026
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2026-02-19
15:40
HL-LHC Crab Cavity High Power RF Specifications / Hagmann, Gregoire (CERN) ; Baudrenghien, Philippe ; Mastoridis, Themistoklis (California Polytechnic State Univ. University (US))
The High-Luminosity LHC will employ crab cavities to increase luminosity. [...]
CERN-ACC-NOTE-2026-0002. - 2026
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2026-01-23
14:36
MD10483: Investigations of UFO Release Mechanisms using Displaced Bunches / Ziegler, Philipp Alois (Goethe University Frankfurt (DE)) ; Belanger, Philippe ; Buffat, Xavier (CERN) ; Calvo, Eva (CERN) ; Coco, Victor (CERN) ; Gancarcik, David ; Gonzalez Berges, Manuel (CERN) ; Hernalsteens, Cedric (CERN) ; Holmberg, Johan Alfred ; Hostettler, Michi (CERN) et al.
Interactions of dust grains with the LHC beams cause beam losses that can trigger premature beam aborts or even quenches of superconducting dipoles. [...]
CERN-ACC-NOTE-2024-0039. - 2024
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2026-01-22
16:18
Study of longitudinal beam instabilities at transition crossing in the CERN Proton Synchrotron / Salinas, Julia Eva (Centrale Supelec (FR)) ; Lasheen, Alexandre (CERN)
The Proton Synchrotron (PS) faces beam stability challenges when crossing transi- tion energy, where longitudinal microwave instabilities can lead to rapid emittance blow-up and beam loss. [...]
CERN-ACC-NOTE-2026-0001. - 2026
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2025-12-19
15:40
Specific Requirements and Challenges in Operation due to Switching between Therapy and Research Operation Modes for a Next Ion Medical Machine / Grubling, Peter (Foundation Tera-Care (CH)) ; Garolfi, Luca
A comprehensive and detailed definition of the requirements specification, knowledge and analysis of the foreseeable use cases, use general and case related safety requirements and consideration of technical feasibility are indispensable prerequisites for the development and manufacture of a research or production device. [...]
CERN-ACC-NOTE-2025-0022 ; NIMMS-Note-0026. - 2025 - 35.
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特輯:
LHC MD Notes (185)