CERN Accelerating science

All CERN Accelerators documents

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2022-08-05
06:25
Non-monotonic dependence of heat loads induced by electron cloud on bunch population at the LHC / Skripka, Galina (CERN ; Dubna, JINR) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (CERN) ; Rumolo, Giovanni (CERN)
Electron cloud effects are among the main performance limitations for the operation of the Large Hadron Collider with 25 ns bunch spacing. Electrons impacting on the beam screens of the superconducting magnets induce a significant heat load reaching values close to the full cooling capacity available from the cryogenic system in some LHC sectors. [...]
2022 - 9 p. - Published in : Eur. Phys. J. Plus 137 (2022) 849 Fulltext: PDF;

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2022-08-05
06:25
Heat transfer of flow boiling carbon dioxide in vertical upward direction / Schmid, David (CERN ; Ecole Polytechnique, Lausanne) ; Verlaat, Bart (CERN) ; Petagna, Paolo (CERN) ; Revellin, Rémi (INSA, Villeurbanne) ; Schiffmann, Jürg (Ecole Polytechnique, Lausanne)
Heat transfer measurements of flow boiling Carbon Dioxide (CO$_2$) in vertical upward direction have been carried out with a dedicated test facility at the European Organization for Nuclear Research (CERN). The investigation covers saturation temperatures within a range of $-25 \degree \textrm{C} \leq T_{\mathrm{sat}} +5 \degree \textrm{C}$, mass velocities from 100kg m$^{-2}$ s$^{-1}$ $\leq G \leq $ 450 kg m$^{-2}$ s$^{-1}$ and heat fluxes of 5.3 kW m$^{-2}$ and 11.4 kW m$^{-2}$. [...]
2022 - 15 p. - Published in : Int. J. Heat Mass Transf. 196 (2022) 123246 Fulltext: PDF;

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2022-08-05
06:25
Key4hep — Turnkey Software for Future Colliders / Fernandez Declara, P (CERN) ; Ganis, G (CERN) ; Hegner, B (CERN) ; Helsens, C (CERN) ; Petric, M (CERN) ; Sailer, A (CERN) ; Volkl, V (CERN) ; Gaede, F (DESY) ; Madlener, T (DESY) ; Fang, W (Beijing, Inst. High Energy Phys.) et al.
Future collider experiments rely on a well-maintained software for their physics performance studies and detector optimisation. The Key4hep project aims to design and provide a common set of software tools that can be used by future or even present-day high-energy physics projects. [...]
2021 - 8 p. - Published in : Acta Phys. Pol. B Fulltext: PDF;
In : XXVII Cracow Epiphany Conference on Future of particle physics, Online, Poland, Online, 7 - 10 Jan 2021, pp.1031

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2022-08-03
09:25
First observation of the charge carrier density related gain reduction mechanism in LGADs with the Two Photon Absorption-Transient Current Technique / Pape, S (CERN ; Tech. U., Dortmund (main)) ; Currás, E (CERN) ; Fernández García, M (Cantabria Inst. of Phys.) ; Moll, M (CERN) ; Montero, R (Basque U., Bilbao) ; Palomo, F R (Seville U.) ; Vila, I (Cantabria Inst. of Phys.) ; Wiehe, M (CERN ; Freiburg U.) ; Quintana, C (Cantabria Inst. of Phys.)
The Low Gain Avalanche Detector (LGAD) technology is very promising for silicon timing detectors and currently heavily researched. Recent studies show that the gain of LGADs highly depends on the charge carrier density inside the gain layer. [...]
2022 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1040 (2022) 167190 Fulltext: PDF;

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2022-08-03
09:25
Benchmark Between Measured and Simulated Radiation Level Data at the Mixed-Field CHARM Facility at CERN / Prelipcean, Daniel (CERN ; Munich, Tech. U.) ; Lerner, Giuseppe (CERN) ; Garcia Alia, Ruben (CERN) ; Bilko, Kacper (CERN) ; Infantino, Angelo (CERN) ; Di Francesca, Diego (CERN) ; Trummer, Julia (CERN) ; Ricci, Daniel (CERN) ; Brucoli, Matteo (CERN) ; Danzeca, Salvatore (CERN)
A benchmark between various radiation monitors employed at CERN for radiation to electronics applications and their simulated values with the FLUKA Monte Carlo is performed at the CHARM mixed-field irradiation facility. Comparisons are made for different operational conditions, using data recorded in the 2015–2018 period..
2022 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1557-1564 Fulltext: PDF;

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2022-08-03
09:25
FPGA Qualification and Failure Rate Estimation Methodology for LHC Environments Using Benchmarks Test Circuits / Scialdone, Antonio (CERN ; Polytech. Turin) ; Ferraro, Rudy (CERN) ; Garcia Alia, Ruben (CERN) ; Sterpone, Luca (Polytech. Turin) ; Danzeca, Salvatore (CERN) ; Masi, Alessandro (CERN)
When studying the behavior of a field programmable gate array (FPGA) under radiation, the most commonly used methodology consists in evaluating the single-event effect (SEE) cross section of its elements individually. However, this method does not allow the estimation of the device failure rate when using a custom design. [...]
2022 - 9 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1633-1641 Fulltext: PDF;

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2022-08-03
09:25
Characterization of Radio-Photo-Luminescence (RPL) Dosimeters as Radiation Monitors in the CERN Accelerator Complex / Pramberger, Dejan (CERN) ; Aguiar, Ygor Q (CERN) ; Trummer, Julia (CERN) ; Vincke, Helmut (CERN)
Dosimetry is a crucial activity in irradiation campaigns to qualify electronics and materials to operate in radiation environments. In addition, it also provides means of monitoring radiation levels in accelerator environments to prevent radiation damage to the machines and improve system lifetime. [...]
2022 - 7 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1618-1624 Fulltext: PDF;

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2022-08-03
09:25
Analysis of the Photoneutron Field Near the THz Dump of the CLEAR Accelerator at CERN With SEU Measurements and Simulations / Lerner, Giuseppe (CERN) ; Coronetti, Andrea (CERN ; Jyvaskyla U.) ; Kempf, Jean Mael (CERN ; ENSAE, Toulouse) ; Garcia Alia, Ruben (CERN) ; Cerutti, Francesco (CERN) ; Prelipcean, Daniel (CERN ; Munich, Tech. U.) ; Cecchetto, Matteo (CERN) ; Gilardi, Antonio (CERN ; Naples U. ; LBNL, Berkeley) ; Farabolini, Wilfrid (CERN ; Saclay) ; Corsini, Roberto (CERN)
We study the radiation environment near the terahertz (THz) dump of the CERN Linear Electron Accelerator for Research (CLEAR) electron accelerator at CERN, using FLUktuierende KAskade in German (FLUKA) simulations and single-event upset (SEU) measurements taken with 32-Mbit Integrated Silicon Solution Inc. (ISSI) static random access memories (SRAMs). [...]
2022 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1541-1548 Fulltext: PDF;

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2022-08-03
09:24
Testing and Validation Methodology for a Radiation Monitoring System for Electronics in Particle Accelerators / Zimmaro, Alessandro (CERN ; IES, Montpellier) ; Ferraro, Rudy (CERN) ; Boch, Jerome (IES, Montpellier) ; Saigne, Frederic (IES, Montpellier) ; Garcia Alia, Ruben (CERN) ; Brucoli, Matteo (CERN) ; Masi, Alessandro (CERN) ; Danzeca, Salvatore (CERN)
In this work, a methodology for the design and validation of a radiation monitoring (RadMON) system for electronic systems in particle accelerators is presented. The methodology expands the common radiation hardness assurance (RHA) procedure implemented at CERN, including new steps dedicated to both system-level testing, focused on a wireless device, and sensors characterization and readout validation. [...]
2022 - 9 p. - Published in : IEEE Trans. Nucl. Sci. 69 (2022) 1642-1650 Fulltext: PDF;

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2022-08-03
09:24
Mössbauer and μSR studies of the rare earth magnetic ordering in high $T_c$ superconductors / de Reotier, P Dalmas (Grenoble, INP) ; Vulliet, P (Grenoble, INP ; Joseph Fourier U.) ; Yaouanc, A (Grenoble, INP) ; Hartmann, O (Uppsala U.) ; Karlsson, E (Uppsala U.) ; Wappling, R (Uppsala U.) ; Chaudouet, P ; Garçon, S (Joseph Fourier U., ENSEIG/INPG) ; Senateur, J P (Grenoble, ENSPG) ; Weiss, F (Grenoble, ENSPG) et al.
We have studied the magnetism of the Gd sub-lattice by μSR and $^{155}$Gd Mössbauer spectroscopy from 65 mK to 3 K. The normalized local magnetic field at the two nuclear probes has the same temperature dependence which strongly deviates from a Curie-Weiss mean field behavior. [...]
1988 - 2 p. - Published in : Physica C 153-155 (1988) 1541-1542
In : International Conference on High-temperature Superconductors and Materials and Mechanisms of Superconductivity, Interlaken, Switzerland, 29 Feb - 4 Mar 1988, pp.1541-1542

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