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Nano-sized Scandia doped dispenser cathode with annular shape for the hollow electron lenses for CERN high luminosity LHC project
/ Yang, Yunfei (Beijing U. of Tech.) ; Wang, Yiman (Beijing U. of Tech.) ; Liu, Wei (Beijing U. of Tech.) ; Pan, Zhaoliu (Beijing U. of Tech.) ; Li, Junhui (Beijing U. of Tech.) ; Wang, Jinshu (Beijing U. of Tech.) ; Perini, Diego (CERN)
The Large Hadron Collider (LHC) is the world largest and most powerful accelerator for high energy physics. The High Luminosity LHC project (HL- LHC) foresees the construction and installation of important upgrades to increase the efficiency of the LHC machine. [...]
2018 - 2 p.
- Published in : 10.1109/IVEC.2018.8391505
In : 19th IEEE International Vacuum Electronics Conference, Monterey, CA, USA, 24 - 26 Apr 2018, pp.319-320
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The development programme of cathodes and electron guns for the hollow electron lenses of the High Luminosity LHC project
/ Perini, Diego (CERN) ; Crawford, Darren (Fermilab) ; Feng, Jinjun (Vacuum Elect. Res. Inst., Beijing) ; Gobbi, Giorgia (CERN) ; Li, Zepeng (Vacuum Elect. Res. Inst., Beijing) ; Liu, Wei (Beijing U. of Tech.) ; Ruan, Jinhao (Fermilab) ; Shao, Wensheng (Vacuum Elect. Res. Inst., Beijing) ; Stancari, Giulio (Fermilab) ; Valerio, Linda (Fermilab) et al.
The High Luminosity LHC project (HL-LHC) foresees the construction and installation of important new equipment to increase the performance of the LHC machine. The Hollow Electron Lens (HEL) is a promising system to control the beam halo. [...]
CERN-ACC-2019-170.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS099
Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS099
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Nonlinear dynamics of proton beams with hollow electron lens in the CERN high-luminosity LHC
/ Mirarchi, D (CERN ; U. Manchester (main)) ; Appleby, R B (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Bruce, R (CERN) ; Giovannozzi, M (CERN) ; Mereghetti, A (CERN) ; Redaelli, S (CERN) ; Stancari, G (Fermilab)
The design stored beam energy in the CERN high-luminosity large hadron collider
(HL-LHC) upgrade is about 700 MJ, with about 36 MJ in the beam tails, according to estimates
based on scaling considerations from measurements at the LHC. Such a large amount of
stored energy in the beam tails poses serious challenges on its control and safe disposal.
In particular, orbit jitters can cause significant losses on primary collimators, which can
lead to accidental beam dumps, magnet quenches, or even permanent damage to collimators
and other accelerator elements. [...]
FERMILAB-PUB-21-713-AD.-
2022 - 28 p.
- Published in : Eur. Phys. J. Plus 137 (2022) 7
Fulltext from Publisher: PDF;
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Imaging a high-power hollow electron beam non-invasively with a gas-jet-based beam profile monitor
/ Zhang, H D (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Rossi, Adriana (CERN) ; Webber-Date, Alexander (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Churchman, Ashley (CERN) ; Welsch, Carsten (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Sequeiro, C Castro (CERN) ; Wenander, Fredrik (CERN) ; Schneider, Gerhard (CERN) ; Sidorowski, Krystian (CERN) ; Ady, Marton (CERN) et al.
The Hollow Electron Lens (HEL) was proposed to actively remove the beam halo of the proton beam for the HL-LHC upgrade. Currently, the concept of generating such an electron beam is being tested in a dedicated Electron Beam Test Stand (EBTS) at CERN. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPL066
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPL066
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Gas Jet-Based Fluorescence Profile Monitor for Low Energy Electrons and High Energy Protons at LHC
/ Sedláček, Ondrej (CERN ; U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Ady, Marton (CERN) ; Churchman, Ashley (CERN) ; Forck, Peter (Darmstadt, GSI) ; Mazzoni, Stefano (CERN) ; Rossi, Adriana (CERN) ; Sameed, Muhammed (CERN) ; Schneider, Gerhard (CERN) ; Sequeiro, Cristina (CERN) ; Sidorowski, Krystian (CERN) et al.
The ever-developing accelerator capabilities of increasing beam intensity, e.g. for High Luminosity LHC (HL-LHC), demand novel non-invasive beam diagnostics. [...]
2023 - 6 p.
- Published in : JACoW IBIC 2023 (2023) 312-317
Fulltext: PDF;
In : 12th International Beam Instrumentation Conference (IBIC 2023), Saskatoon, Canada, 10 - 14 Sep 2023, pp.312-317
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Conceptual Design of the HL-LHC Hollow Electron Lens Superconducting Magnet System
/ Foussat, Arnaud (CERN) ; Bragin, Alexey (Novosibirsk, IYF) ; Ferlin, Gerard (CERN) ; Kirby, Glyn (CERN) ; Kolehmainen, Antti (CERN) ; Nikiforov, Danila (Novosibirsk, IYF) ; Pavliuchenko, Vadim (Novosibirsk, IYF) ; Perini, Diego (CERN) ; Petrone, Carlo (CERN) ; Redaelli, Stefano (CERN) et al.
The Hollow Electron Lens (HEL) units are part of the upgrade baseline of the High-Luminosity LHC accelerator (HL-LHC) and will be installed in the machine ring at point P4 on each counter-rotating LHC proton beamline during a long shutdown in 2025-2027 at CERN. The main goal is to improve the collimation system performance by controlling beam energy loss in the beam halo. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4100905
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4100905
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High Luminosity LHC Hollow Electron Lens Collimation using MERLIN
/ Rafique, Haroon (Huddersfield U.) ; Appleby, Robert (Manchester U.) ; Barlow, Roger (Huddersfield U.) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Tygier, Sam (Manchester U.) ; Wagner, Joschka (CERN)
The high luminosity large hadron collider (HL-LHC) upgrade envisions an unprecedented stored beam energy of up to 700 MJ. To protect the machine during operation, an efficient collimation system is vital. [...]
2016 - 4 p.
- Published in : 10.18429/JACoW-ICAP2015-MODBC2
Fulltext: PDF;
In : Proceedings, 12th International Computational Accelerator Physics Conference, ICAP2015, Shanghai, China, 12 - 16 Oct 2015, pp.MODBC2
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Simulation of Hollow Electron Lenses as LHC Beam Halo Reducers using Merlin
/ Rafique, Haroon (Huddersfield U.) ; Barlow, Roger (Huddersfield U.) ; Appleby, Robert Barrie (Manchester U.) ; Tygier, S (Manchester U.) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
The Large Hadron Collider (LHC) and its High Luminosity (HL) upgrade foresee unprecedented stored beam energies of up to 700 MJ. The collimation system is responsible for cleaning the beam halo and is vital for successful machine operation. [...]
CERN-ACC-2015-0196.-
Geneva : CERN, 2015 - 4 p.
Fulltext: PDF;
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.TUPTY069
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