IPAC2021 - List of Authors (Efthymiopoulos, I.)

Paper	Title	Page
MOPAB029	Burn-Off with Asymmetric Interaction Points	138
	R. Tomás García, I. Efthymiopoulos, G. Iadarola CERN, Geneva, Switzerland
	LHC can host above 2700 proton bunches per ring providing collisions in the ATLAS, CMS, LHCb and ALICE interaction points. ATLAS and CMS are placed symmetrically so that they feature the same colliding bunch pairs. However this is not the case for LHCb, hence introducing unwanted bunch-by-bunch variations of the bunch intensity as the physics fill evolves. We present first analytical derivations, numerical simulations and experimental data in different bunch train collision configurations.
	Poster MOPAB029 [1.502 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB029
About •	paper received ※ 13 May 2021 paper accepted ※ 25 May 2021 issue date ※ 27 August 2021
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MOPAB132	The Multi-Mega-Watt Target Station for the European Spallation Source Neutrino Super Beam	466
	E. Baussan, E. Bouquerel, L. D’Alessi, M. Dracos, P. Poussot, J. Thomas, J. Wurtz, V. Zeter IPHC, Strasbourg Cedex 2, France P. Cupial, M. Koziol, L.J. Lacny, J. Snamina AGH University of Science and Technology, Kraków, Poland I. Efthymiopoulos CERN, Meyrin, Switzerland T. Tolba University of Hamburg, Hamburg, Germany
	Funding: This project has received funding from the European Union Horizon 2020 research and innovation program under grant agreement No 777419 and also by the Deutsche Forschungsgemeinschaft No 423761110. One of the next challenges in fundamental physics is to understand the origin of matter/antimatter asymmetry in the Universe. In particular, intense neutrinos could play an important role to elucidate this mystery and better understand the expansion of the Universe. The ESSnuSB collaboration proposes to use the proton linac of the European Spallation Source currently under construction in Lund (Sweden) to produce a very intense neutrino super beam, in parallel with the spallation neutron production. A very challenging part of the proposed facility is the Target Station which will have to afford 5 MW proton beam power. This poster will present the hadronic collector and the whole facility to produce the next generation of neutrino superbeam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB132
About •	paper received ※ 20 May 2021 paper accepted ※ 27 May 2021 issue date ※ 18 August 2021
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THPAB172	Bunch Luminosity Variations in LHC Run 2	4094
	I. Efthymiopoulos, S.D. Fartoukh, G. Iadarola, N. Karastathis, S. Papadopoulou, Y. Papaphilippou CERN, Geneva, Switzerland
	The LHC is designed to collide intense bunches of protons with tightly defined conditions, aimed to maximize the delivered recorded integrated luminosity to the experiments. One of these conditions is the maximum level of bunch-to-bunch fluctuation in the luminosity, in particular when levelling at maximum acceptable event rate at the experiments. Analysis results of the bunch-to-bunch luminosity variations in LHC Run 2 are presented here. In particular, the observed correlations with the LHC filling pattern that can enhance the effects introducing bunch-dependent losses or emittance blow-up from injection to collisions are discussed. In Run 2 conditions, bunch-by-bunch luminosity fluctuations reached 10% at the start of collisions and gradually increased with time, without affecting the experiments as the luminosity was not levelled. Projections for Run 3 and HL-LHC operation are discussed along with envisaged mitigation measures.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB172
About •	paper received ※ 18 May 2021 paper accepted ※ 19 July 2021 issue date ※ 23 August 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Burn-Off with Asymmetric Interaction Points

138

R. Tomás García, I. Efthymiopoulos, G. Iadarola
CERN, Geneva, Switzerland

LHC can host above 2700 proton bunches per ring providing collisions in the ATLAS, CMS, LHCb and ALICE interaction points. ATLAS and CMS are placed symmetrically so that they feature the same colliding bunch pairs. However this is not the case for LHCb, hence introducing unwanted bunch-by-bunch variations of the bunch intensity as the physics fill evolves. We present first analytical derivations, numerical simulations and experimental data in different bunch train collision configurations.

Poster MOPAB029 [1.502 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB029

About •

paper received ※ 13 May 2021 paper accepted ※ 25 May 2021 issue date ※ 27 August 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB132

The Multi-Mega-Watt Target Station for the European Spallation Source Neutrino Super Beam

466

E. Baussan, E. Bouquerel, L. D’Alessi, M. Dracos, P. Poussot, J. Thomas, J. Wurtz, V. Zeter
IPHC, Strasbourg Cedex 2, France
P. Cupial, M. Koziol, L.J. Lacny, J. Snamina
AGH University of Science and Technology, Kraków, Poland
I. Efthymiopoulos
CERN, Meyrin, Switzerland
T. Tolba
University of Hamburg, Hamburg, Germany

Funding: This project has received funding from the European Union Horizon 2020 research and innovation program under grant agreement No 777419 and also by the Deutsche Forschungsgemeinschaft No 423761110.
One of the next challenges in fundamental physics is to understand the origin of matter/antimatter asymmetry in the Universe. In particular, intense neutrinos could play an important role to elucidate this mystery and better understand the expansion of the Universe. The ESSnuSB collaboration proposes to use the proton linac of the European Spallation Source currently under construction in Lund (Sweden) to produce a very intense neutrino super beam, in parallel with the spallation neutron production. A very challenging part of the proposed facility is the Target Station which will have to afford 5 MW proton beam power. This poster will present the hadronic collector and the whole facility to produce the next generation of neutrino superbeam.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB132

About •

paper received ※ 20 May 2021 paper accepted ※ 27 May 2021 issue date ※ 18 August 2021

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAB172

Bunch Luminosity Variations in LHC Run 2

4094

I. Efthymiopoulos, S.D. Fartoukh, G. Iadarola, N. Karastathis, S. Papadopoulou, Y. Papaphilippou
CERN, Geneva, Switzerland

The LHC is designed to collide intense bunches of protons with tightly defined conditions, aimed to maximize the delivered recorded integrated luminosity to the experiments. One of these conditions is the maximum level of bunch-to-bunch fluctuation in the luminosity, in particular when levelling at maximum acceptable event rate at the experiments. Analysis results of the bunch-to-bunch luminosity variations in LHC Run 2 are presented here. In particular, the observed correlations with the LHC filling pattern that can enhance the effects introducing bunch-dependent losses or emittance blow-up from injection to collisions are discussed. In Run 2 conditions, bunch-by-bunch luminosity fluctuations reached 10% at the start of collisions and gradually increased with time, without affecting the experiments as the luminosity was not levelled. Projections for Run 3 and HL-LHC operation are discussed along with envisaged mitigation measures.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB172

About •

paper received ※ 18 May 2021 paper accepted ※ 19 July 2021 issue date ※ 23 August 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)