CERN Accélérateur de science

Accelerator Physics

Derniers ajouts:
2024-03-19
06:18
Vacuum ultraviolet optical properties of GaSb determined by synchrotron rotating analyzer ellipsometry: applications in nanopillars and plasmonics / Hale, Nathan (Norwegian U. Sci. Tech.) ; Bjelland, Victoria M (CERN ; Norwegian U. Sci. Tech.) ; Cobet, Christoph (Linz U.) ; Esser, Norbert (Berlin, Tech. U.) ; Kildemo, Morten (Norwegian U. Sci. Tech.)
The vacuum ultraviolet (VUV) optical properties in the range 4 eV to 15 eV of GaSb have been determined by rotating analyzer ellipsometry (RAE) using synchrotron light. The localized surface plasmon resonances (LSPRs) and surface plasmon polaritons (SPPs) are studied as a means to understand the plasmonic behavior of GaSb. [...]
2023 - 17 p. - Published in : Optical Materials Express 13 (2023) 1440

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2024-03-15
15:39
Local Interaction Region Coupling Correction for the LHC / Soubelet, Felix
In order to further expand our knowledge of the structure of matter and the workings of our universe, scientists are constantly seeking to collide particles at ever-increasing energies and with higher luminosity. So is the task of the Large Hadron Collider (LHC) at CERN, the highest energy particle accelerator and collider to date, and the goal of its future upgrade into the High-Luminosity Large Hadron Collider (HL-LHC). [...]
CERN-THESIS-2023-357.- 205 p. Fulltext: PDF; External link: Approve this document (restricted)

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2024-03-14
17:53
FOCUS: fast Monte Carlo approach to coherence of undulator sources / Siano, M (Milan U. ; INFN, Milan) ; Geloni, G (European XFEL, Hamburg) ; Paroli, B (Milan U. ; INFN, Milan) ; Butti, D (CERN) ; Lefèvre, T (CERN) ; Mazzoni, S (CERN) ; Trad, G (CERN) ; Iriso, U (CELLS - ALBA, LLS) ; Nosych, A A (CELLS - ALBA, LLS) ; Torino, L (CELLS - ALBA, LLS) et al.
FOCUS (Fast Monte CarlO approach to Coherence of Undulator Sources) is a new GPU-based simulation code to compute the transverse coherence of undulator radiation from ultra-relativistic electrons. The core structure of the code, which is written in the language C++ accelerated with CUDA, combines an analytical description of the emitted electric fields and massively parallel computations on GPUs. [...]
2023 - 10 p. - Published in : J. Synchrotron Radiat. 30 (2023) 217-226 Fulltext: PDF;

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2024-03-14
17:53
Assembly and Test Results of the RMM1a,b Magnet, a CERN Technology Demonstrator Towards Nb3Sn Ultimate Performance / Gautheron, Emma (CERN) ; Bordini, Bernardo (CERN) ; Campagna, Guillaume (CERN) ; Felice, Hélène (CERN) ; Fleiter, Jerome (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mugnier, Sylvain (CERN) ; Perez, Juan Carlos (CERN) ; Petrone, Carlo (CERN) et al.
As part of the High Field Magnet technology development carried out at CERN, demonstrators are under construction to explore the full potential of Nb 3 Sn. The Racetrack Model Magnet (RMM) is one of them, building upon the successful Enhanced Racetrack Model Coil (eRMC) eRMC1a magnet which reached 16.5 T peak field or 16.3 T bore field at 1.9 K. [...]
2023 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-8

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2024-03-12
12:47
Properties of the hosing and self-modulation instabilities of long particle beams in overdense plasma / Moreira, Mariana
Plasma-based acceleration (PBA) could dramatically reduce the size and/or cost of particle colliders, which have been at the forefront of fundamental discoveries in physics, and whose technical limits it is becoming increasingly costly to push [...]
CERN-THESIS-2023-355 - 100 p.


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2024-03-09
06:40
Laser-induced periodic surface structuring for secondary electron yield reduction of copper: dependence on ambient gas and wavelength / Nivas, Jijil JJ (INFN, Naples ; Naples U. ; U. Naples (main) ; CNR-SPIN, Naples) ; Hu, Meilin (U. Naples (main)) ; Valadan, Mohammadhassan (INFN, Naples ; Naples U.) ; Salvatore, Marcella (U. Naples (main) ; Naples U.) ; Fittipaldi, Rosalba (INFN, Naples ; Naples U. ; U. Salerno (main)) ; Himmerlich, Marcel (CERN) ; Bez, Elena (CERN ; Leipzig U.) ; Rimoldi, Martino (CERN) ; Passarelli, Andrea (INFN, Naples ; Naples U.) ; Oscurato, Stefano L (U. Naples (main)) et al.
One of the main limitations for future high-performance accelerators operating with positively charged particles is the formation of an electron-cloud inside the beam vacuum chamber, giving rise to instabilities. The Secondary Electron Yield (SEY) of the beam-facing surfaces gives a measure of the mechanism which drives this phenomenon. [...]
2023 - 11 p. - Published in : Appl. Surf. Sci. 622 (2023) 156908 Fulltext: PDF;

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2024-03-05
10:19
Linear and nonlinear beam dynamics of vertical fixed-field accelerators / Vanwelde, Marion (U. Brussels (main)) ; Hernalsteens, Cédric (U. Brussels (main) ; CERN) ; Pauly, Nicolas (U. Brussels (main))
Vertical fixed-field accelerators (vFFAs) feature a magnetic field that increases exponentially in the vertical direction, resulting in vertically stacked nonplanar orbits. Their magnetic field is highly nonlinear, and their solenoid and quadrupolar components induce strongly coupled optics. [...]
2024 - 20 p. - Published in : Phys. Rev. Accel. Beams 27 (2024) 024003 Fulltext: PDF;

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2024-03-04
12:07
Development of a Readout Board for an Optical Beam Loss Monitor based on Cherenkov Radiation at CERN / Lima, Erika
This thesis presents the theory, design, fabrication, and characterization of a sensor electronics board for a novel beam loss monitor based on optical fibres developed at Centre Européenne pour la Recherche Nucléaire (CERN) by the Beam Instrumentation group [...]
CERN-THESIS-2021-377 - Roma : Sapienza Università di Roma, Ingegneria dell’Informazione, Informatica e Statistica, 2021-10-22.


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2024-03-01
08:36
The high luminosity Large Hadron Collider project: from project to reality at CERN / Cantalapiedra, G Aparicio (CERN) ; Oliveira, J (CERN) ; Corso, J P (CERN) ; Fessia, P (CERN) ; Maridor, S (CERN) ; Modena, M (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) project is an upgrade of the LHC aiming to increase by a factor 10 the harvested integrated luminosity foreseen early 40s. During Long Shutdown 3, scheduled to begin at the end of 2025, nearly 1.2 km of accelerator components, including a range of services spread across surface and underground facilities, will be replaced with new equipment deploying innovative key technologies. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPM124 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPM124

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2024-02-19
13:41
Optical readout of MicroPattern Gaseous Detectors with SiPMs / Woods, Jesse
In order to probe the universe for new and exciting physics, increasingly higher and higher energy scales must be accessed to test our theories, potentially uncovering new particles and interactions. [...]
CERN-STUDENTS-Note-2024-004.
- 2022.
Full text

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