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CERN Accelerating science

CERN Published Articles

Senast inlagda poster:
2025-06-18
06:02
Assessing the origin of the LHC beam halo / Rakic, Milica (CERN ; Ecole Polytechnique, Lausanne) ; Hermes, Pascal (CERN) ; Redaelli, Stefano (CERN) ; Butti, Daniele (CERN) ; Mirarchi, Daniele (CERN) ; Roncarolo, Federico (CERN) ; Bartosik, Hannes (CERN) ; Hostettler, Michi (CERN) ; Kostoglou, Sofia (CERN) ; Seidel, Mike (PSI, Villigen)
Measurements of the transverse beam-halo population at large amplitudes in the Large Hadron Collider (LHC) provide crucial insights into the stored beam energy near the LHC collimators. These particles do not contribute significantly to the luminosity but their loss could impose limitations on accelerator performance through sudden loss spikes or even collimator damage in case of fast beam failures. [...]
2025 - 4 p. - Published in : 10.18429/JACoW-IPAC25-THAN1 Fulltext: PDF; External link: Fulltext
In : International Particle Accelerator Conference (IPAC'25), Taipei, Taiwan, 1-6 June 2025, pp.2430-2433

Detaljerad journal
2025-06-18
06:02
Precise time and energy measurement with a homogeneous electromagnetic calorimeter / Kovač, Marko (Split U.) /CMS Collaboration
The CMS experiment at the LHC has been running for 16 years, precisely measuring the energy of electrons and photons in high-energy collisions using a homogeneous electromagnetic calorimeter (ECAL). The PbWO4 crystal calorimeter operates in a challenging radiation environment at high event rates, requiring continuous response corrections and specialized techniques to mitigate the effects of pileup. [...]
2025 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1080 (2025) 170639
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025, pp.170639

Detaljerad journal
2025-06-18
06:02
Characterization and beam test measurements of CMS Phase-2 luminometers / Kadlecsik, Á (Eotvos U.) ; Auzinger, G (CERN) ; Bakhshiansohi, H (Isfahan Tech. U.) ; Dabrowski, A E (CERN) ; Delannoy, A G (Tennessee U.) ; Dalavi, V (Isfahan Tech. U.) ; Dienemann, N (CERN ; Hochschule, Eng. Econ., Karlsruhe) ; Dragicevic, M (Vienna, OAW) ; Garcia, M F (Unlisted, ES) ; Guthoff, M (DESY) et al.
The physics program of the HL-LHC requires high-precision (≲1%) luminosity determination. Two new luminosity detectors are being developed by the CMS BRIL (Beam Radiation, Instrumentation, and Luminosity) project: the Fast Beam Condition Monitor (FBCM), a standalone detector with unique timing capabilities, and the Tracker Endcap Pixel (TEPX) detector augmented with real-time cluster reconstruction in the FPGA of a dedicated back-end board at 10% of the full level-1 trigger rate. [...]
2025 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1080 (2025) 170663
In : 17th Vienna Conference on Instrumentation (VCI2025), Vienna, Austria, 17 - 21 Feb 2025, pp.170663

Detaljerad journal
2025-06-18
06:02
Positron-Positronium Converters in Reflection and Transmission Geometry for Gravitational Experiments with Antihydrogen using Moiré Deflectometry / Ferguson, R C (Trento U. ; INFN, Trento) ; Alfaro Campos, S (Siegen U. ; Innsbruck U.) ; Auzins, M (Latvia U.) ; Berghold, M (Munich, Tech. U.) ; Bergmann, B (Prague, Tech. U.) ; Burian, P (Prague, Tech. U.) ; Brusa, R S (Trento U. ; INFN, Trento) ; Camper, A (Oslo U.) ; Caravita, R (Trento U. ; INFN, Trento) ; Castelli, F (INFN, Milan ; Milan U.) et al.
In the context of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEgIS) located at CERN, positron-positronium converters with a high positron-positronium conversion efficiency have been designed in both reflection and transmission geometries. The converters utilize nanochanneled silicon target technology with positron conversion efficiencies up to around 50% and around 16%, at room temperature and in the absence of magnetic fields, for reflection and transmission respectively. [...]
2025 - 5 p. - Published in : J. Phys. : Conf. Ser. 3029 (2025) 012005 Fulltext: PDF;
In : International Workshop on Positron and Positronium Chemistry, Kanazawa, Japan, 27 Oct - 1 Nov, pp.012005

Detaljerad journal
2025-06-18
06:02
How to surf to high energies / Gschwendtner, Edda Maria (CERN) ; Muggli, Patric (Munich, Max Planck Inst.) ; Turner, Marlene (CERN)
The AWAKE experiment is adapting plasma-wakefield acceleration for applications in particle physics..
2024 - 4 p. - Published in : CERN Cour.: 64 (2024) , no. 3, pp. 25-28 External link: Fulltext

Detaljerad journal
2025-06-14
06:01
Influence of symmetry breaking on the inner core of a structured laser beam / Niewiem, Witold (CERN ; Zurich, ETH) ; Polak, Krystof (CERN ; Liberec Tech. U.) ; Figura, Sebastian (CERN ; Cracow Tech. U.) ; Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN) ; Wieser, A (Zurich, ETH)
2025 - 13 p. - Published in : Opt. Express 33 (2025) 19664-19676 External links: Fulltext; Fulltext

Detaljerad journal
2025-06-14
06:01
Numerical application of the mode matching technique to the longitudinal impedance computation in particle accelerators / Biancacci, N (CERN) ; Passarelli, A (INFN, Naples)
The accurate knowledge of the beam coupling impedance in particle accelerators is important in order to address potential impedance-driven instabilities and for planning machine upgrades. While simple models exist for various components (e.g., beam pipes, step transitions, and collimators), they are often insufficient to correctly describe the overall machine impedance with the necessary precision. [...]
2025 - 16 p. - Published in : Phys. Rev. Accel. Beams 28 (2025) 022001

Detaljerad journal
2025-06-12
08:40
Irradiation tests of the OBDTv1 board at CHARM / CMS DT Collaboration
The CMS Muon Drift Tube (DT) chambers require an upgrade oftheir on-detector electronics for operation in the High LuminosityLHC (HL-LHC) due to increased radiation, occupancy and triggerrates. The new On-Detector Board for Drift Tubes (OBDT) digitizesdrift signals with a resolution of 0.8 ns and transmits them viahigh-speed optical links into the counting room, where the fulldetector information will be available to perform the trigger andevent building logic. [...]
2025 - 15 p. - Published in : JINST 20 (2025) T05009 Fulltext: PDF;

Detaljerad journal
2025-06-12
08:40
Safety at HL-LHC IT String during construction, commissioning, and operation / Bozzini, D (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Blanchard, S (CERN) ; Gascon, J (CERN) ; Heredia, N (CERN) ; Onufrena, A (CERN) ; Perin, A (CERN) ; Rodriguez Mateos, F (CERN) ; Yammine, S (CERN) et al.
The HL-LHC IT String, a test facility for the major components of the HL-LHC Inner Triplet, is currently in its construction and commissioning phases in a surface building at CERN. The primary motivation of the HL-LHC IT String is to study and validate the collective behaviour of its different subsystems which include mainly: the inner triplet superconducting magnets and their correctors, a novel superconducting link, the cryogenics infrastructure for the cooling and quench recovery, the powering and quench protection systems, and the remote alignment system. [...]
2025 - 6 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 1327 (2025) 012189 Fulltext: PDF;
In : 26th International Cryogenic Engineering Conference and International Cryogenic Materials Conference 2024, Geneva, Switzerland, 22 - 26 July 2024, pp.012189

Detaljerad journal
2025-06-12
08:40
Development of the MOSAIX chip for the ALICE ITS3 upgrade / Vicente Leitao, P (CERN) /ALICE Collaboration
Following the ALICE ITS3 detector development path of wafer-scale monolithic stitched pixel detector prototypes (MOSS & MOST) in the TPSCo. 65 nm CMOS imaging technology, the MOSAIX chip is the prototype of the final full-size and full-functionality ITS3 sensor. [...]
2025 - 7 p. - Published in : JINST 20 (2025) C06001 Fulltext: PDF;
In : Topical Workshop on Electronics for Particle Physics 2024, Glasgow, United Kingdom, 30 Sep - 4 Oct 2024, pp.C06001

Detaljerad journal