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Slow Extraction Techniques from Fixed Field Accelerators
/ Taylor, R (Imperial Coll., London ; CERN) ; Steinberg, A F (Manchester U. ; Melbourne U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Pasternak, J (Imperial Coll., London) ; Appleby, R B (Manchester U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Sheehy, S L (Melbourne U. ; ANSTO, Menai) ; Benedetto, E (Unlisted, CH ; CERN)
Fixed Field Accelerators are a candidate for future hadron cancer therapy facilities as their high repetition rate and large energy acceptance enables novel treatment modalities such as high dose rate FLASH. However, conventional dose delivery mechanisms are still necessary, requiring continuous beam delivery over 1--30s. [...]
2023
- Published in : JACoW IPAC 2023 (2023) MOPL176
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL176
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Energy deposition studies for the Upgrade II of LHCb at the CERN Large Hadron Collider
/ Ciccotelli, Alessia (CERN ; U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Appleby, Robert B. (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Cerutti, Francesco (CERN) ; Buffet, Kevin (CERN) ; Butin, Francois (CERN) ; Corti, Gloria (CERN) ; Esposito, Luigi Salvatore (CERN) ; Garcia Alia, Ruben (CERN) ; Karacson, Matthias (CERN) ; Lerner, Giuseppe (CERN) et al.
The Upgrade II of the LHCb experiment is proposed to be installed during the CERN Long Shutdown 4, aiming to operate LHCb at 1.5x$10^{34}cm^{-2}s^{-1}$ that is 75 times its design luminosity and reaching an integrated luminosity of about $400 fb^{-1}$ by the end of the High Luminosity LHC era. This increase of the data sample at LHCb is an unprecedented opportunity for heavy flavour physics measurements. [...]
arXiv:2310.08281.-
2024-06-01 - 17 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 061003
Fulltext: 2310.08281 - PDF; Publication - PDF;
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Energy deposition studies for the LHCb insertion region of the CERN Large Hadron Collider
/ Ciccotelli, Alessia (Manchester U. ; CERN) ; Appleby, Robert B (Manchester U.) ; Cerutti, Francesco (CERN) ; Bilko, Kacper (CERN) ; Esposito, Luigi Salvatore (CERN) ; Garcia Alia, Ruben (CERN) ; Lechner, Anton (CERN) ; Tsinganis, Andrea (CERN)
The LHCb (Large Hadron Collider beauty) experiment at CERN LHC aims at achieving a significantly higher luminosity than originally planned by means of two major upgrades: the Upgrade I that took place during the Long Shutdown 2 (LS2) and the Upgrade II proposed for LS4. Such an increase in instantaneous and integrated luminosity with respect to the design values requires to reassess the radiation exposure of LHC magnets, cryogenics, and electronic equipment placed in the insertion region 8 (IR8) around LHCb. [...]
2023 - 14 p.
- Published in : Phys. Rev. Accel. Beams 26 (2023) 061002
Fulltext: PDF;
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5.
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IMPACTS OF STRONGLY CURVED MAGNETIC MULTIPOLES ON COMPACT SYNCHROTRON DYNAMICS
/ Norman, H X Q (University of Manchester, Manchester, UK and Cockcroft Institute, Warrington, UK and University of Melbourne, Melbourne, Australia) ; Appleby, R B (Univrsity of Manchester, Manchester, UK and Cockcroft Institute, Warrington, UK) ; Sheehy, S L (Australian Nuclear Science and Technology Organisation (ANSTO), Australia) ; Benedetto, Elena (SEEIIST Association (CH))
Superconducting curved magnets can reduce accelerator footprints by producing strong fields (>3 T) for applications such as carbon ion therapy, however the effect of strongly curved magnetic multipoles and fringe fields on accelerator beam dynamics is not fully understood. [...]
CERN-ACC-NOTE-2023-0009 ; CERN-NIMMS-015.
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2023. - 6 p.
Access to fulltext
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Long term stability studies in the presence of crab cavities and high order multipoles in the CERN super proton synchrotron and high luminosity large hadron collider
/ Alekou, A (CERN ; Manchester U.) ; Appleby, R B (Manchester U.) ; Cruz-Alaniz, E (CERN ; U. Liverpool (main)) ; Bartosik, H (CERN) ; Carlà, M (CERN) ; Kostoglou, S (CERN) ; Papaphilippou, Y (CERN)
In 2018 the world’s first Crab Cavity (CC) experiments with protons were successfully performed, aiming to study the CC effect on a proton beam and evaluate the engineering challenges. Before the commencement of these experiments, the impact of the CCs and their multipoles on the long term particle stability of the SPS was studied using dynamic aperture simulations. [...]
2023 - 15 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1050 (2023) 168178
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Implications of the Upgrade II of LHCb on the LHC Insertion Region 8: From Energy Deposition Studies to Mitigation Strategies
/ Ciccotelli, Alessia (CERN ; U. Manchester (main)) ; Appleby, Robert B (U. Manchester (main)) ; Butin, Francois (CERN) ; Cerutti, Francesco (CERN) ; Esposito, Luigi Salvatore (CERN) ; Humann, Barbara (TU Vienna ; CERN) ; Wehrle, Maud (CERN)
Starting from LHC Run3, a first upgrade of the LHCb experiment (Upgrade I) will enable oeration with a significantly increased instantaneous luminosity in the LHC Insertion Region 8 (IR8), up to 2 $\cdot$ 10$^{33}$ cm$^{-2}$ s$^{-1}$. Moreover, the proposed second upgrade of the LHCb experiment (Upgrade II) aims at increasing it by an extra factor 7.5 (up to 1.5 $\cdot$ 10$^{34}$ cm$^{-2}$ s$^{-1}$, as of Run 5) and collecting an integrated luminosity of 400fb$^{-1}$ by the end of Run 6. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1679-1682
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1679-1682
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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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