CERN Accelerating science

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2024-04-11
11:49
Measurement of emittance growth and oscillation spectrum for different damper gains (MD 9407) / Buffat, Xavier (CERN) ; Fornara, Andrea (University of Manchester (GB)) ; Giacomel, Lorenzo (CERN) ; Kostoglou, Sofia (CERN) ; Lannoy, Christophe (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Mounet, Nicolas (CERN) ; Radoslavova, Anna Valeri (Heidelberg University (DE)) ; Sterbini, Guido (CERN) ; Valuch, Daniel (CERN)
The procedure of an experiment aiming at studying the impact of the transverse damper gain on the beam oscillation spectrum and on the emittance growth of colliding beams is described along with the corresponding results. [...]
CERN-ACC-NOTE-2024-0007.
- 2024.
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2024-04-11
11:49
Octupole threshold with trains of bunches (MD 9403) / Buffat, Xavier (CERN) ; Giacomel, Lorenzo (CERN) ; Rumolo, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Paraschou, Konstantinos (CERN)
We describe an experiment aiming at determining the stability threshold in terms of octupole current for bunch trains at flat top in the LHC. [...]
CERN-ACC-NOTE-2024-0006.
- 2024.
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2024-04-11
06:11
Porting OpenMMC to STM32 Microcontrollers for Flexible AMC Development / Stubbings, Michael (Diamond Light Source) ; Perez Juarez, Emilio (Diamond Light Source) ; Stant, Laurence (Diamond Light Source) ; Wujek, Adam (CERN)
Diamond Light Source has chosen the MicroTCA platform for high performance data acquisition and controls as part of the Diamond-II 4th generation light source upgrade. One requirement is the ability to create custom advanced mezzanine cards (AMCs) for signal conditioning and interlock support. [...]
2023 - 4 p. - Published in : JACoW ICALEPCS 2023 (2023) THPDP078 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.THPDP078

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2024-04-10
06:01
Energy Consumption Optimisation by Using Advanced Control Algorithms / Ghawash, Faiq (CERN ; Norwegian U. Sci. Tech.) ; Blanco Viñuela, Enrique (CERN) ; Schofield, Brad (CERN)
Large industries operate energy-intensive equipment and energy efficiency is an important objective when trying to optimize the final energy consumption. CERN utilizes a large amount of electrical energy to run its accelerators, detectors and test facilities, with a total yearly consumption of 1.3 TWh and peaks of about 200 MW. [...]
2023 - 8 p. - Published in : JACoW ICALEPCS 2023 (2023) MO3AO06 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.MO3AO06

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2024-04-10
06:01
A Modular Approach for Accelerator Controls Components Deployment for High Power Pulsed Systems / Pavis, Steven (CERN) ; Barlow, Roger (CERN) ; Boucly, Christophe (CERN) ; Carlier, Etienne (CERN) ; Chanavat, Christophe (CERN) ; Lolliot, Christophe (CERN) ; Magnin, Nicolas (CERN) ; Van Trappen, Pieter (CERN) ; Voumard, Nicolas (CERN)
As part of the LHC Injector Upgrade (LIU) project, the controls of the PSB and PS injection kickers at CERN have been upgraded during Long Shutdown 2 (LS2) from heterogeneous home-made electronic solutions to a modular and open architecture. Despite both kickers have significantly different functionalities, topologies and operational requirements, standardized hardware and software control blocks have been used for both systems. [...]
2023 - 5 p. - Published in : JACoW ICALEPCS 2023 (2023) TUPDP101 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.TUPDP101

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2024-04-10
06:01
The Micro-Services of Cern’s Critical Current Test Benches / Charrondière, Cedric (CERN) ; Andreassen, Odd (CERN) ; Ballarino, Amalia (CERN) ; Barth, Christian (CERN) ; Boutboul, Thierry (CERN) ; Fleiter, Jerome (CERN) ; Hopkins, Simon (CERN) ; Koziol, Piotr (CERN) ; Reymond, Hubert (CERN)
In order to characterize the critical-current density of low temperature superconductors such as niobium¿titanium (NbTi) and niobium¿tin (Nb₃Sn) or high temperature superconductors such as magnesium-diboride MgB₂ or Rare-earth Barium Copper Oxide REBCO tapes, a wide range of custom instruments and interfaces are used. The critical current of a superconductor depends on temperature, magnetic field, current and strain, requiring high precision measurements in the nano Volt range, well-synchronized instrumentation, and the possibility to quickly adapt and replace instrumentation if needed. [...]
2023 - 6 p. - Published in : JACoW ICALEPCS 2023 (2023) THPDP002 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.THPDP002

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2024-04-10
06:01
Web Application Packaging - Deploying Web Applications as Traditional Desktop Applications in CERN’s Control Centre / von Hohenbühel, Maximilian (CERN) ; Deghaye, Stephane (CERN) ; Galatas, Epameinondas (CERN) ; Matli, Emanuele (CERN) ; Roux, Eric (CERN)
Web applications are becoming increasingly performant and are now capable, in many cases, of replacing traditional desktop applications. There is also a user demand for web-based applications, surely linked to their modern look & feel, their ease of access, and the overall familiarity of the users with web applications due to their pervasive nature. [...]
2023 - 6 p. - Published in : JACoW ICALEPCS 2023 (2023) TUPDP090 Fulltext: PDF;
In : 19th International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS 2023), Cape Town, South Africa, 7 - 13 Oct 2023, pp.TUPDP090

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2024-04-05
14:26
FCC-ee Machine Detector Interface Alignment System Concepts / Watrelot, Leonard
This thesis is in the framework of the lepton collider part of the Future Circular Collider project, aiming to be the next flagship project at CERN after the High Luminosity upgrade of the Large Hadron Collider, in 2040. The study focuses on the alignment, and monitoring of the alignment, of some accelerator components located inside the physics detector, close to the collision point. [...]
CERN-THESIS-2023-376.- 205 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-04-05
04:48
Interpretation of the horizontal beam response near the third integer resonance / Cortés García, E.C. (DESY ; Darmstadt, GSI) ; Niedermayer, P. (Darmstadt, GSI) ; Singh, R. (Darmstadt, GSI) ; Taylor, R. (CERN ; Imperial Coll., London) ; Feldmeier, E. (Heidelberg U.) ; Hun, M. (Heidelberg U.) ; Benedetto, E. (Unlisted, CH) ; Haberer, T. (Heidelberg U.)
The beam response to an external periodic excitation delivers relevant information about the optics, tune distribution and stability of a circulating beam in a storage ring. [...]
arXiv:2404.02576.
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2024-04-04
13:18
Beam dynamics driven design of powerful energy recovery linac for experiments / Bogacz, S A (Jefferson Lab) ; André, K D J (CERN) ; Brüning, O (CERN) ; Holzer, B J (CERN) ; Hounsell, B R (U. Liverpool (main)) ; Klein, M (U. Liverpool (main)) ; Militsyn, B L (Daresbury) ; Williams, P H (Daresbury) ; Segurana, G Pérez (Lancaster U.) ; Bailey, I (Lancaster U.) et al.
Powerful ERL for experiments (PERLE) is a novel energy recovery linac (ERL) test facility [1], designed to validate choices for a 50 GeV ERL foreseen in the design of the Large Hadron Electron Collider and the Future Circular Collider and to host dedicated nuclear and particle physics experiments. Its main goal is to demonstrate the high current, continuous wave, multipass operation with superconducting cavities at 802 MHz. [...]
2024 - 15 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 031603 Fulltext: PDF;

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