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
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2025-06-18
06:02 |
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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
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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
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2025-06-18
06:02 |
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2025-06-14
06:01 |
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2025-06-14
06:01 |
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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
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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
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2025-06-12
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