CERN Accelerating science

LHC

Latest additions:
2022-11-28
16:10
A Wall Current Transformer for Beam Intensity Measurements in the Large Hadron Collider / Krupa, Michal
The Large Hadron Collider (LHC) collides two counter-rotating particle beams to recreate conditions that existed in the first moments after the universe began [...]
CERN-THESIS-2022-226 - 110 p.


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2022-11-23
06:24
Status of Layout Studies for Fixed-Target Experiments in Alice Based on Crystal-Assisted Halo Splitting / Patecki, Marcin (Warsaw U. of Tech.) ; Fomin, Alex (CERN) ; Kikoła, Daniel (Warsaw U. of Tech.) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) is the world largest and most powerful particle accelerator colliding beams of protons and lead ions at energies up to 7 TeV and 2.76 TeV, respectively. ALICE is one of the detector experiments optimised for heavy-ion collisions. [...]
2022 - 5 p. - Published in : JACoW HB 2021 (2022) 146-150 Fulltext: PDF;
In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.146-150

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2022-11-23
06:24
First Experience of Crystal Collimators During LHC Special Runs and Plans for the Future / D'Andrea, Marco (CERN ; U. Padua (main)) ; Avati, Valentina (CERN ; AGH-UST, Cracow) ; Bruce, Roderik (CERN) ; Butcher, Mark (CERN) ; Deile, Mario (CERN) ; Di Castro, Mario (CERN) ; Dziedzic, Bartosz (Cracow, INP) ; Garcia Morales, Hector (CERN ; Royal Holloway, U. of London) ; Gavrikov, Yury (St. Petersburg, INP ; CERN) ; Hiller, Karlheinz (DESY, Zeuthen) et al.
Bent crystals can deflect charged particles by trapping them within the potential well generated by neighboring crystalline planes and forcing them to follow the curvature of the crystal itself. This property has been extensively studied over the past decade at the CERN accelerator complex, as well as in other laboratories, for a variety of applications, ranging from beam collimation to beam extraction and in-beam fixed target experiments. [...]
2022 - 6 p. - Published in : JACoW HB 2021 (2022) 12-17 Fulltext: PDF;
In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.12-17

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2022-11-09
08:30
Layouts for Feasibility Studies of Fixed-Target Experiments at the LHC / Hermes, Pascal (CERN) ; Dewhurst, Kay (CERN) ; Fomin, Alex (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The Physics Beyond Colliders (PBC) study investigates means of exploiting the potential of the CERN accelerator complex to complement the laboratory’s scientific programme at the main Large Hadron Collider (LHC) experiments. The LHC fixed-target (FT) working group studies new experiments at beam energies up to 7 TeV. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 2134-2137 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2134-2137

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2022-11-09
08:30
Comparison Between Run 2 TID Measurements and FLUKA Simulations in the CERN LHC Tunnel of the Atlas Insertion Region / Prelipcean, Daniel (CERN) ; Biłko, Kacper (CERN) ; Cerutti, Francesco (CERN) ; Ciccotelli, Alessia (CERN) ; Di Francesca, Diego (CERN) ; García Alía, Ruben (CERN) ; Humann, Barbara (CERN) ; Lerner, Giuseppe (CERN) ; Ricci, Daniel (CERN) ; Sabaté-Gilarte, Marta (CERN)
In this paper we present a systematic benchmark between the simulated and the measured data for the radiation monitors useful for Radiation to Electronics (R2E) studies at the Large Hadron Collider (LHC) at CERN. For this purpose, the radiation levels in the main LHC tunnel on the right side of the Interaction Point 1 (ATLAS detector) are simulated using the FLUKA Monte Carlo code and compared against Total Ionising Dose (TID) measurements performed with the Beam Loss Monitoring (BLM) system, and 180 m of Distributed Optical Fibre Radiation Sensor (DOFRS). [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 732-735 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.732-735

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2022-11-09
08:30
Beam-Based Reconstruction of the Shielded Quench-Heater Fields for the LHC Main Dipoles / Richtmann, Lea (CERN) ; Bortot, Lorenzo (CERN) ; Ravaioli, Emmanuele (CERN) ; Wiesner, Christoph (CERN) ; Wollmann, Daniel (CERN)
Small orbit oscillations of the circulating particle beams have been observed immediately following quenches in the LHC’s superconducting main dipole magnets. Magnetic fields generated during the discharge into the quench heaters were identified as the cause. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1874-1877 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1874-1877

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2022-11-09
08:30
Progress on Action Phase Jump for LHC Local Optics Correction / Cardona, Javier F (Colombia, U. Natl.) ; García Morales, Hector (CERN) ; Hofer, Michael (CERN) ; Maclean, Ewen (CERN) ; Persson, Tobias (CERN) ; Rodriguez Garcia, Yohany (Colombia, U. Natl. ; Antonio Narino U.) ; Tomás García, Rogelio (CERN)
The correction of the local optics at the Interaction Regions of the LHC is crucial to ensure a good performance of the machine. This is even more important for the future LHC upgrade, HL-LHC, where the optics is more sensitive to magnetic errors. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1850-1853 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1850-1853

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2022-11-09
08:30
A Local Modification of HL-LHC Optics for Improved Performance of the Alice Fixed-Target Layout / Patecki, Marcin (Warsaw U. of Tech. (main)) ; Fomin, Alex (CERN) ; Hermes, Pascal (CERN) ; Kikoła, Daniel (Warsaw U. of Tech. (main)) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) is the world’s largest and most powerful particle accelerator colliding beams of protons and lead ions at energies up to 7 TeV and 2.76 TeV, respectively. ALICE is one of the detector experiments optimised for heavy-ion collisions. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 108-111 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.108-111

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2022-11-09
08:30
Studies on Pre-Computation of SPS-to-LHC Transfer Line Corrections / Bracco, Chiara (CERN) ; Velotti, Francesco (CERN)
The injection process in the LHC gives a non-negligible contribution to the turnaround time between two consecutive physics fills. Mainly due to orbit drifts in the SPS, the steering of the SPS-to-LHC transfer lines (TL) had to be regularly performed in view of minimising injection oscillations and losses, which otherwise would trigger beam dumps. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1711-1714 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1711-1714

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2022-11-09
08:30
Controlling Landau Damping via Feed-Down From High-Order Correctors in the LHC and HL-LHC / Dilly, Joschua (CERN ; Humboldt U., Berlin) ; Maclean, Ewen (CERN) ; Tomás García, Rogelio (CERN)
Amplitude detuning measurements in the LHC have shown that a significant amount of detuning is generated in Beam 1 via feed-down from decapole and dodecapole field errors in the triplets of the experiment insertion regions, while in Beam 2 this detuning is negligible. In this study, we investigate the cause of this behavior and we attempt to find corrections that use the feed-down from the nonlinear correctors in the insertion region for amplitude detuning..
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 1995-1998 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1995-1998

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Focus on:
High Luminosity Large Hadron Collider (HL-LHC) (1,045)
HiLumi LHC (264)