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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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SPS Long Term Stability Studies in the Presence of Crab Cavities and High Order Multipoles
/ Alekou, Androula (CERN ; U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Appleby, Robert (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Bartosik, Hannes (CERN) ; Calaga, Rama (CERN) ; Carlà, Michele (CERN) ; Papaphilippou, Yannis (CERN)
A local Crab Cavity (CC) scheme will recover the head-on collisions at the IP of the High Luminosity LHC (HL-LHC), which aims to increase the LHC luminosity by a factor of 3-10. The tight space constraints at the CC location result in axially non-symmetric cavity designs that introduce high order multipole CC components. [...]
2018 - 3 p.
- Published in : 10.18429/JACoW-HB2018-WEP2PO008
Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.WEP2PO008
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Beam dynamics simulations with Crab Cavities in the SPS machine
/ Alekou, Androula (CERN ; U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Appleby, Robert (U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Bartosik, Hannes (CERN) ; Carlà, Michele (CERN) ; Papaphilippou, Yannis (CERN)
The LHC Upgrade, called High Luminosity LHC, aims to increase the integrated luminosity by a factor of 10. To achieve this, the project relies on a number of key innovative technologies, including the use of superconducting Crab Cavities with ultra-precise phase control for beam rotation. [...]
CERN-ACC-2019-147.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPGW095
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW095
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First machine development results with HL-LHC crab cavities in the SPS
/ Carver, Lee (U. Liverpool (main)) ; Alekou, Androula (U. Manchester (main)) ; Antoniou, Fanouria (CERN) ; Appleby, Robert (U. Manchester (main)) ; Bartosik, Hannes (CERN) ; Bohl, Thomas (CERN) ; Burt, Graeme (Lancaster U. (main)) ; Calaga, Rama (CERN) ; Carlà, Michele (CERN) ; Levens, Thomas (CERN) et al.
Crab cavities are a critical component within the High Luminosity upgrade project for the Large Hadron Collider (HL-LHC). It is foreseen to use crab cavities in order to compensate the geometric luminosity reduction factor (reduction of the luminous region at the Interaction Point [IP]) due to the beam crossing angle (required for minimizing the impact of the long range beam-beam effects on the single particle beam dynamics) and increase the number of collisions per bunch crossing. [...]
CERN-ACC-2019-148.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPGW094
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW094
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First demonstration of the use of crab cavities on hadron beams
/ Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p.
- Published in : Phys. Rev. Accel. Beams 24 (2021) 062001
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SPS Studies in Preparation for the Crab Cavity Experiment
/ Alekou, Androula (CERN ; U. Manchester (main) ; CERN) ; Antoniou, Fanouria (CERN ; CERN) ; Appleby, Robert (U. Manchester (main) ; U. Manchester (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Arduini, Gianluigi (CERN ; CERN) ; Bartosik, Hannes (CERN ; CERN) ; Calaga, Rama (CERN ; CERN) ; Papaphilippou, Yannis (CERN ; CERN ; CERN) ; Welsch, Carsten (U. Liverpool (main) ; Cockcroft Inst. Accel. Sci. Tech.)
A local Crab Cavity (CC) scheme will recover head-on collisions at the Interaction Points (IPs) of the High Luminosity LHC (HL-LHC), which aims to increase the LHC luminosity by a factor of 3-10. The first time that CC will ever be tested with proton beams will be in 2018 in the SPS machine. [...]
CERN-ACC-2017-203.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPVA034
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In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA034
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FCC-hh Experimental Insertion Region Design
/ Abelleira, JoséL. (JAI, UK) ; Appleby, Robert B. (Manchester U.) ; Arsenyev, Sergey (CERN) ; Barranco, Javier (Ecole Polytechnique, Lausanne) ; Benedikt, Michael (CERN) ; Besana, Maria Ilaria (CERN) ; García, Oscar Blanco (Frascati) ; Boscolo, Manuela (Frascati) ; Boutin, David (IRFU, Saclay) ; Buffat, Xavier (CERN) et al.
The Future Circular Collider study is exploring possible designs of circular colliders for the post-LHC era, as recommended by the European Strategy Group for High Energy Physics. [...]
arXiv:2007.12058.
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74 p.
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Performance Study of the NIMMS Superconducting Compact Synchrotron for Ion Therapy with Strongly Curved Magnets
/ Norman, Hannah (U. Manchester (main)) ; Appleby, Robert (U. Manchester (main)) ; Benedetto, Elena (U. Geneva (main)) ; Karppinen, Mikko (CERN) ; Owen, Hywel (Daresbury) ; Sheehy, Suzanne (Melbourne U.)
Delivery of heavy ion therapy currently utilises normal conducting synchrotrons. For the future generation of clini- cal facilities, the accelerator footprint must be reduced while adopting beam intensities above 1 × 10¹⁰ particles per spill for more efficient, effective treatment. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 3014-3017
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.3014-3017
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Status of the beam-based measurement of the skew-sextupolar component of the radio frequency field of a HL-LHC-type crab-cavity
/ Carlà, M (CELLS - ALBA, LLS) ; Carlier, F (CERN) ; Calaga, R (CERN) ; Tomas, R (CERN) ; Kostoglou, S (CERN) ; Bartosik, H (CERN)
Two High Luminosity Large Hadron Collider (LHC) type crab-cavities have been installed in the CERN SPS for testingpurposes. A first partially successful attempt to characterize the skew-sextupolar component of the radio frequency field of the crab-cavityby means of beam-based techniques has been carried out in 2018.The large orbit distortion produced by the crab cavity dipolar field combined with the multipolar errors in the SPS opticsresulted in some systematic errors that cannot be easily accounted for. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPL001
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL001
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