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2024-12-20
12:11
Long-range beam-beam mitigation for round optics / Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (CERN)
When colliding high intensity bunch trains at low beta*, a sufficiently large crossing angle needs to be imposed at the interaction point (IP) in order to separate the two beams before and after the collision, and mitigate the so-called long-range beam-beam (BBLR) effect, which otherwise can be very detrimental to the beam lifetime. [...]
CERN-ACC-NOTE-2023-0029. - 2023

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2024-12-19
05:10
Development of self-modulation as a function of plasma length / Clairembaud, Arthur (Munich, Max Planck Inst. ; Munich, Tech. U.) ; Turner, Marlene (CERN) ; Muggli, Patric (Munich, Max Planck Inst.)
We use numerical simulations to determine whether the saturation length of the self-modulation (SM) instability of a long proton bunch in plasma could be determined by measuring the radius of the bunch halo SM produces. [...]
arXiv:2412.12922. - 13.
Fulltext

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2024-12-18
06:05
Future Circular Lepton Collider Vibrational Crosstalk / Lersnimitthum, Purinut (Chulalongkorn U.) ; Piccini, Audrey (CERN) ; Carra, Federico (CERN) ; Boonyatee, Tirawat (Chulalongkorn U.) ; Wansophark, Niphon (Chulalongkorn U.) ; Ajavakom, Nopdanai (Chulalongkorn U.)
CERN, the European Organisation for Nuclear Research is studying the feasibility of the Future Circular Collider, considering both financial and technical aspects. One of the challenges is that the performance of particle accelerators relies on the dynamic stability of structures, affected by multiple sources of vibrations, including crosstalk vibration between two particle accelerators, the Booster and Collider, in the Future Circular Lepton Collider. [...]
2024 - 16 p. - Published in : Vibration 7 (2024) 912-927 Fulltext: PDF;

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2024-12-18
06:05
Next generation Linux Applications Gateway for CERN accelerator control systems / Regúlez, Mario Rey (CERN) ; Oulevey, Thomas (CERN)
CERN has been providing central Windows remote desktops via the Windows Terminal Infrastructure service for several years and aims to provide a similar experience for Linux graphical environments. Different communities and experiments offer a series of tools to their users with this goal in mind, but the solutions are far from ideal and generate a support overhead for their respective providers. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 295 (2024) 07033 Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.07033

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2024-12-17
11:08
Highlights of the diversity and inclusion session at the LLRF22 workshop / Angoletta, Maria Elena (CERN) ; Coletta, Melania (CERN) ; Spycher, Melina (PSI) ; Doolittle, Larry (LBNL)
Developing Low Level Radio Frequency (LLRF) systems for accelerators requires teams with skills in a variety of areas such as beam dynamics, analogue/digital electronics, firmware/software engineering and feedback theory. [...]
CERN-ACC-NOTE-2024-0024. - 2024

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2024-12-15
06:05
Applications of Particle Accelerators / Sheehy, Suzie (Melbourne U.)
Of the tens of thousands of particle accelerators in operation worldwide, the vast majority are not used for particle physics, but instead for applications. [...]
arXiv:2407.10216. - 2024 - 16.
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2024-12-15
06:05
Building CERN’s Future Circular Collider—An Estimation of Its Impact on Value Added and Employment / Streicher, Gerhard ; Gutleber, Johannes (CERN)
This chapter explores the potential economic and employment impacts of constructing the Future Circular Collider (FCC), a next-generation particle accelerator being developed by CERN. [...]
2025 - 14.
Fulltext

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2024-12-11
06:11
A Novel Method for Transverse Beam-Coupling Impedance Measurements in Particle Accelerator Devices Using the Bead-Pull Method / Antuono, Chiara (U. Rome La Sapienza (main) ; CERN) ; Sito, Leonardo (CERN ; Naples U.) ; Calzone, Eleonora (U. Rome La Sapienza (main) ; CERN) ; el Dali, D (CERN) ; Migliorati, Mauro (CERN ; U. Rome La Sapienza (main)) ; Mostacci, Andrea (CERN ; U. Rome La Sapienza (main)) ; Fienga, Francesco (CERN ; Naples U.) ; Marrazzo, Vincenzo Romano (CERN ; Naples U.) ; Breglio, Giovanni (CERN ; Naples U.) ; Rumolo, G (CERN) et al.
In high-energy particle accelerators, circulating particle beams with high intensity interact electromagnetically with their surroundings (i.e., metallic vacuum chambers of various geometries). These electromagnetic interactions, which are typically described through the concept of beam-coupling impedance, can represent a serious issue in terms of stability of the particle beam and heating on the accelerator structures. [...]
2024 - 9 p. - Published in : IEEE Trans. Instrum. Meas. 73 (2024) 8005209 Fulltext: PDF;

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2024-12-11
06:11
Shielded Pair Method for Beam Screen Surface Resistance Measurement at Cryogenic Temperature / Brunner, Kristóf (CERN ; Wigner RCP, Budapest) ; Krkotić, Patrick (CERN) ; Calatroni, Sergio (CERN) ; Barna, Dániel (Wigner RCP, Budapest)
The shielded pair resonator method is a useful tool in the measurement of accelerator components, such as the beam screens used in the Large Hadron Collider (LHC), the High-Luminosity (HL) LHC, or future accelerators. It can measure the resistive losses at several frequency points by separating the resistive losses on the sample from other sources of losses. [...]
2024 - 14 p. - Published in : Instruments 8 (2024) 43 Fulltext: PDF;

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2024-12-11
04:18
Impact of beam asymmetries at the Future Circular Collider <math display="inline"><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>-</mo></msup></math> / Kicsiny, Peter (CERN ; EPFL-ISIC, Lausanne) ; Buffat, Xavier (CERN) ; Nguyen, Khoi Le Nguyen (Cambridge U.) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne) ; Seidel, Mike (EPFL-ISIC, Lausanne ; PSI, Villigen)
In this paper we present detailed simulations with asymmetric initial beam settings in the context of the proposed Future Circular Collider e+e- (FCC-ee) using the Xsuite framework. We compare simulated equilibrium bunch sizes and luminosities against an already existing analytical model, which shows remarkably good agreement for realistic small perturbations. [...]
arXiv:2410.02302.- 2024-12-01 - 13 p. - Published in : Phys. Rev. Accel. Beams: 27 (2024) , no. 12, pp. 121001 Fulltext: Publication - PDF; 2410.02302 - PDF;

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