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Modelling and Measurements of Bunch Profiles at the LHC Flat Bottom
/ Papadopoulou, Stefania (CERN) ; Antoniou, Fanouria (CERN) ; Muller, Juan (CERN) ; Papaphilippou, Yannis (CERN) ; Trad, Georges (CERN)
At the LHC flat bottom the interplay between a series of effects (i.e. intrabeam scattering, longitudinal beam manipulations, non-linearities of the machine, etc) can lead to a population of the tails of the beam distributions, which may become non-Gaussian. [...]
CERN-ACC-2016-250.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-TUPMW022
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.TUPMW022
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Estimates of Collective Effects for the FCC-$e^+e^-$ Pre-Booster Ring
/ Etisken, Ozgur (CERN) ; Antoniou, Fanouria (CERN) ; Çiftçi, Abbas Kenan (Izmir U. Economics, Izmir) ; Oide, Katsunobu (CERN ; KEK, Tsukuba) ; Papaphilippou, Yannis (CERN) ; Zimmermann, Frank (CERN)
The FCC-e⁺e⁻ injector complex needs to produce and to transport high-intensity e⁺ and e⁻ beams at a fast repetition rate for topping up the collider at its collision energy. Two different options are under consideration as pre-accelerator before the bunches are transferred to the high-energy booster: either using the existing SPS machine or designing a completely new ring. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 148-151
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.148-151
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Interplay Between Space Charge, Intra-Beam Scattering, and Synchrotron Radiation Effects
/ Zampetakis, Michail (CERN ; Crete U.) ; Antoniou, Fanouria (CERN) ; Bartosik, Hannes (CERN) ; Papaphilippou, Yannis (CERN)
The objective of this research is to study the interplay of synchrotron radiation, intra-beam scattering, and space charge in the vicinity of excited resonances. In this respect, two modules were developed to simulate intra-beam scattering and synchrotron radiation effects and plugged into pyORBIT to be used together with its space charge module. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3220-3223
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3220-3223
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Space Charge Studies on LEIR
/ Saá Hernández, Angela (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Hirlaender, Simon (CERN) ; Huschauer, Alexander (CERN) ; Moreno Garcia, Daniel (CERN)
The performance of the CERN Low Energy Ion Ring with electron cooled ion beams is presently limited by losses occurring once the beam has been captured in the RF buckets. An intense machine study program was started by the end of 2015 to mitigate the losses and improve the performance of the accelerator. [...]
CERN-ACC-2018-134.-
2018 - 6 p.
- Published in : (2018) , pp. THPAF055
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 062020
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAF055
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Modelling intra-beam scattering in the LHC for longitudinal beam loss studies
/ Zampetakis, Michail (CERN) ; Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Timko, Helga (CERN) ; Iliakis, Konstantinos (CERN)
In the Large Hadron Collider (LHC), intra-beam scattering (IBS) is one of the main drivers of longitudinal emittance growth during the long injection plateau. With the halo of the longitudinal bunch distribution being close to the separatrix, IBS consequently drives beam losses by pushing particles outside the RF bucket at the flat-bottom. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR55
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR55
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First LHC Emittance Measurements at 6.5 TeV
/ Kuhn, Maria (CERN) ; Antoniou, Fanouria (CERN) ; Bravin, Enrico (CERN) ; Dehning, Bernd (CERN) ; Emery, Jonathan (CERN) ; Kain, Verena (CERN) ; Langner, Andy (CERN) ; Papaphilippou, Yannis (CERN) ; Piselli, Emiliano (CERN) ; Trad, Georges (CERN)
During LHC Run 1 significant transverse emittance growth through the LHC cycle was observed. Measurements indicated most of the blow-up to occur during the injection plateau and the ramp. [...]
2016 - 5 p.
- Published in : 10.18429/JACoW-IBIC2015-WEALA02
Fulltext: PDF;
In : International Beam Instrumentation Conference , Melbourne, Australia, 13 - 17 Sep 2015, pp.WEALA02
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Interplay between Space Charge and Intra-beam Scattering for the CERN Ion Injectors
/ Zampetakis, Michail (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Papaphilippou, Yannis (CERN)
The CERN ion injectors, SPS and LEIR, operate in a strong space charge and intra-beam scattering regime, which can lead to degradation of their beam performance. To optimize machine performance requires thus to study the interplay of these two effects in combined space charge and intrabeam scattering tracking simulations. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 214-217
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.214-217
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Collective Effects Estimates for the Damping Ring Design of the FCC-ee
/ Etisken, Ozgur (CERN) ; Antoniou, Fanouria (CERN) ; De Santis, Antonio (Frascati) ; Milardi, Catia (Frascati) ; Zimmermann, Frank (CERN)
The current injector complex design of the FCC-e⁺e⁻ project consists of e⁺/e⁻ linacs, which accelerate the beams up to 6 GeV, a damping ring at 1.54 GeV, a pre-booster ring, accelerating the beam up to 16 GeV and a booster synchrotron ring integrated in the collider tunnel accelerating the beams up to the collision energies. The purpose of the damping ring is to accept the 1.54 GeV beam coming from the linac-1, damp the positron/electron beams and provide the required beam characteristics for the injection into the linac-2. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2435-2438
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2435-2438
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Transverse emittance studies at extraction of the CERN PS Booster
/ Antoniou, Fanouria (CERN) ; Albright, Simon (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Di Giovanni, Gian Piero (CERN) ; Forte, Vincenzo (CERN) ; Fraser, Matthew (CERN) ; Valdivieso, Ana (CERN) ; Huschauer, Alexander (CERN) ; Mikulec, Bettina (CERN) et al.
Transverse emittance discrepancy in the beam transfer between the Proton Synchrotron Booster (PSB) and the Proton Synchrotron (PS) is observed in operational conditions for the LHC beams at CERN. The ongoing LHC Injectors Upgrade (LIU) project requires a tight budget for beam degradation along the injector chain and therefore the reason for this emittance discrepancy needs to be understood. [...]
CERN-ACC-2019-085.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPTS087
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPTS087
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