2024-06-11
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Optics for Landau damping with minimized octupolar resonances in the LHC
/ Tomás, R (CERN) ; Carlier, F (CERN) ; Chudoba, F (CERN) ; Deniau, L (CERN) ; Dilly, J (CERN) ; Ferrentino, V (CERN ; Naples U.) ; Horney, S (CERN) ; Hostettler, M (CERN) ; Keintzel, J (CERN) ; Kostoglou, S (CERN) et al.
Operation of the Large Hadron Collider (LHC) requires strongoctupolar magnetic fields to suppress coherent beam instabilities.The amplitude detuning that is generated by these octupolar magneticfields brings the tune of individual particles close to harmfulresonances, which are mostly driven by the octupolar fieldsthemselves. In 2023, new optics were deployed in the LHC atinjection with optimized betatronic phase advances to minimize theresonances from the octupolar fields without affecting the amplitudedetuning. [...]
2024 - 14 p.
- Published in : JINST 19 (2024) T05010
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T05010
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2024-06-11
06:40 |
ScienceBox 2.0: Evolving the demonstrator package for CERN storage and analysis services
/ Bocchi, Enrico (CERN) ; Desai, Jimil (CERN) ; Sainz, Samuel Alfageme (SWITCH, Zurich)
With containers being the de-facto standard to package, distribute, and run applications, Helm charts are on the rise for application deployment in managed clusters (e.g., Kubernetes, OpenShift), providing developers and operators with a rich ecosystem of tools to utilize, as well as the means to configure applications and roll changes out in a programmatic way.This paper describes the reboot of the ScienceBox project: The containerized software bundle providing the ability to deploy CERN storage and analysis services on any cloud or local infrastructure. While the service offering provided through ScienceBox remains unchanged, we evolved the original implementation to make use of Helm charts across the entire stack and incorporated a major architectural update to CERNBox, replacing the previous PHP backend with a distributed microservices architecture. [...]
2024 - 8 p.
- Published in : EPJ Web Conf. 295 (2024) 08015
Fulltext: PDF;
In : 26th International Conference on Computing in High Energy & Nuclear Physics, Norfolk, Virginia, Us, 8 - 12 May 2023, pp.08015
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2024-06-11
06:40 |
Metal additive manufacturing for particle accelerator applications
/ Romano, Tobia (Milan, Polytech. ; Riga Tech. U.) ; Pikurs, Guntis (CERN ; Riga Tech. U.) ; Ratkus, Andris (Riga Tech. U.) ; Torims, Toms (CERN ; Riga Tech. U.) ; Delerue, Nicolas (IJCLab, Orsay) ; Vretenar, Maurizio (CERN) ; Stepien, Lukas (Fraunhofer Inst., Dresden) ; López, Elena (Fraunhofer Inst., Dresden) ; Vedani, Maurizio (Milan, Polytech.)
Metal additive manufacturing technologies are rapidly becoming an integral part of the advanced technological portfolio for the most demanding industrial applications. These processes are capable of fabricating three-dimensional components with near-net shape quality by depositing the constituent materials in a layer-by-layer fashion. [...]
2024 - 38 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 054801
Fulltext: PDF;
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2024-06-11
06:40 |
Quad-module characterization with the MALTA monolithic pixel chip
/ Dachs, F (CERN) ; Zoubir, A M (Darmstadt, Tech. U.) ; Sharma, A (CERN) ; Solans Sanchez, C (CERN) ; Buttar, C M (Glasgow U.) ; Bortoletto, D (Oxford U.) ; Dobrijevic, D (Zagreb U.) ; Berlea, D -V (DESY) ; Charbon, E (Ecole Polytechnique, Lausanne) ; Piro, F (CERN) et al.
The MALTA silicon pixel detector combines a depleted monolithic active pixel sensor (DMAPS) with a fully asynchronous front-end and readout. It features a high granularity pixel matrix with a 36.4 μm symmetric pixel pitch, low power consumption of <1 μW/pixel and low material budget with detector thicknesses as little as 50 μm. [...]
2024 - 3 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1064 (2024) 169306
In : PSD13: The 13th International Conference on Position Sensitive Detectors, Oxford, United Kingdom, 3 - 9 Sep 2023, pp.169306
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2024-06-11
06:40 |
Production study of Fr, Ra and Ac radioactive ion beams at ISOLDE, CERN
/ Jajčišinová, E (Geel, JRC ; Leuven U.) ; Dockx, K (Leuven U.) ; Au, M (CERN) ; Bara, S (Leuven U.) ; Cocolios, T E (Leuven U.) ; Chrysalidis, K (CERN) ; Farooq‑Smith, G J (Leuven U. ; Edinburgh U.) ; Fedorov, D V (Unlisted) ; Fedosseev, V N (CERN) ; Flanagan, K T (Manchester U.) et al.
The presented paper discusses the production of radioactive ion beams of francium, radium, and actinium from thick uranium carbide (UC$_{x}$) targets at ISOLDE, CERN. This study focuses on the release curves and extractable yields of francium, radium and actinium isotopes. [...]
2024 - 9 p.
- Published in : Sci. Rep. 14 (2024) 11033
Fulltext: PDF;
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2024-06-11
06:40 |
Design of the RF waveguide network for the klystron-based CLIC main linac RF module
/ Wang, P (CERN) ; Capstick, M (CERN) ; Catalan Lasheras, N (CERN) ; Doebert, S (CERN) ; Grudiev, A (CERN) ; Rossi, C (CERN) ; Sanchez, P Morales (CERN) ; Syratchev, I (CERN) ; Wu, X (CERN)
The klystron-based Compact Linear Collider (CLIC) was initially proposed with a low center-of-mass energy of 380 GeV, primarily due to potential cost-effectiveness. To enhance overall cost-efficiency, reliability, and stability, a novel RF module for klystron-based CLIC main linac has been designed and studied. [...]
2024 - 11 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1064 (2024) 169410
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2024-06-11
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2024-06-11
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A new cold cooling system using krypton for the future upgrade of the LHC after the long shutdown 4 (LS4)
/ Contiero, Luca (CERN ; Norwegian U. Sci. Tech.) ; Verlaat, Bart (CERN) ; Hafner, Armin (Norwegian U. Sci. Tech.) ; Banasiak, Krzysztof (Norwegian U. Sci. Tech.) ; Allouche, Yosr (Norwegian U. Sci. Tech.) ; Petagna, Paolo (CERN)
Future silicon detectors for High Energy Physics Experiments will require operation at lower temperatures to cope with radiation damage of the sensors and consequent increase of the dark current, beyond the limit of the current CO2 evaporative cooling system. This, together with many other requirements such as mass minimization and high radiation hardness, pushes the need of a new advanced cooling technology. [...]
2024 - 15 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1064 (2024) 169420
Fulltext: PDF;
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2024-06-11
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2024-06-11
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Production rates of long-lived radionuclides Be10 and Al26 under direct muon-induced spallation in granite quartz and its implications for past high-energy cosmic ray fluxes
/ Sakurai, H (Yamagata U.) ; Kurebayashi, Y (Yamagata U.) ; Suzuki, S (Yamagata U.) ; Horiuchi, K (Hirosaki U.) ; Takahashi, Y (Yamagata U.) ; Doshita, N (Yamagata U.) ; Kikuchi, S (Yamagata U.) ; Tokanai, F (Yamagata U.) ; Iwata, N (Yamagata U.) ; Tajima, Y (Yamagata U.) et al.
This study measured the Be10 and Al26 production cross sections of muon-induced long-lived radionuclides to investigate the long-term variations in high-energy cosmic ray muon yields and high-energy galactic cosmic rays over a few million years. We exposed targets consisting of synthetic silica plates and quartz samples in a 1-m-long granite core to a beam containing 8.79×1012 positive muons over ∼120 days with an energy of 160 GeV extracted at the COMPASS experiment line at CERN-SPS. [...]
2024 - 18 p.
- Published in : Phys. Rev. D 109 (2024) 102005
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