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Transverse beam dynamics studies with high intensity LHC beams in the SPS
/ Carlà, Michele (CERN) ; Bartosik, Hannes (CERN) ; Beck, Mario (CERN) ; Carver, Lee (CERN ; U. Liverpool (main)) ; Kain, Verena (CERN) ; Kotzian, Gerd (CERN) ; Li, Kevin (CERN) ; Rumolo, Giovanni (CERN) ; Zannini, Carlo (CERN)
In order to reach the target beam parameters of the LHC injectors upgrade (LIU), about twice the presently operational intensity of LHC type beams has to be achieved. Although the planned upgrade of the main RF system will occur during the long shutdown, a series of measurements have been performed to assess the beam dynamics challenges with these very high intensity beams on the long SPS injection plateau. [...]
CERN-ACC-2019-083.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS089
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS089
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Studies of Transverse Instabilities in the CERN SPS
/ Beck, Mario (CERN ; U. Rostock) ; Bartosik, Hannes (CERN) ; Carlà, Michele (CERN) ; Li, Kevin (CERN) ; Rumolo, Giovanni (CERN) ; Schenk, Michael (CERN ; Ecole Polytechnique, Lausanne) ; van Rienen, Ursula (Rostock U.)
In the framework of the LHC Injectors Upgrade (LIU), beams with about twice the intensity compared to the present values will have to be accelerated by the CERN Super Proton Synchrotron (SPS) and extracted towards the Large Hadron Collider (LHC). Machine studies with intensity higher than the nominal LHC beam have shown that coherent instabilities in both transverse planes may develop at injection energy, potentially becoming a limitation for the future high intensity operation. [...]
2018 - 5 p.
- Published in : 10.18429/JACoW-HB2018-WEP2PO011
Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.WEP2PO011
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Studies of Horizontal Instabilities in the CERN SPS
/ Beck, Mario (CERN ; Rostock U.) ; Bartosik, Hannes (CERN) ; Carlà, Michele (CERN) ; Li, Kevin (CERN) ; Rumolo, Giovanni (CERN) ; Schenk, Michael (CERN ; Ecole Polytechnique, Lausanne) ; van Rienen, Ursula (Rostock U.)
In the framework of the LHC Injectors Upgrade (LIU), beams with double intensity with respect to the present values will have to be successfully accelerated by the CERN Super Proton Synchrotron (SPS) and extracted towards the Large Hadron Collider (LHC). However, first experience running with intensity higher than the nominal LHC beam has shown that coherent instabilities in the horizontal plane may develop, becoming a potential intensity limitation for the future high intensity operation. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAF034
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF034
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Studies of a New Optics With Intermediate Transition Energy as Alternative for High Intensity LHC Beams in the CERN SPS
/ Carlà, Michele (CERN) ; Bartosik, Hannes (CERN) ; Beck, Mario (CERN ; U. Rostock) ; Li, Kevin (CERN) ; Schenk, Michael (Ecole Polytechnique, Lausanne ; CERN)
The LHC injector upgrade project calls for a twofold increase in intensity of the SPS proton beam. In this paper, we present studies with a new SPS optics called Q22, which has a transition energy in between the one of the operationally used Q20 and Q26 optics. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF022
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF022
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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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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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Understanding of the CERN-SPS Horizontal Instability with Multiple Bunches
/ Zannini, Carlo (CERN) ; Bartosik, Hannes (CERN) ; Carlà, Michele (CERN ; CELLS - ALBA, LLS) ; Carver, Lee (ESRF, Grenoble ; CERN) ; Li, Kevin (CERN) ; Métral, Elias (CERN) ; Rumolo, Giovanni (CERN) ; Salvant, Benoit (CERN) ; Schenk, Michael (CERN)
At the end of 2018, an instability with multiple bunches has been consistently observed during high intensity studies at the CERN-SPS. This instability could be a significant limitation to achieve the bunch intensity expected after the LHC Injector Upgrade (LIU). [...]
2022 - 6 p.
- Published in : JACoW HB 2021 (2022) 77-82
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.77-82
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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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