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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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2.
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Optics and Non-Linear Beam Dynamics at 4 and 6.5 TeV
/ Tomás, R (CERN) ; Bach, T (CERN) ; Hagen, P (CERN) ; Langner, A (CERN) ; Levinsen, Y I (CERN) ; Mcateer, M J (CERN) ; Maclean, E H (CERN) ; Persson, T H B (CERN) ; Skowronski, P (CERN) ; White, S (CERN)
2012 has been an extraordinary year for the control and understanding of the LHC optics. A record low β-beating of about 7% has been achieved during nominal operation. [...]
Geneva : CERN, 2012 - 12 p.
- Published in : (2012) , pp. 171-182
Fulltext: PDF;
In : 4th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 17 - 20 Dec 2012, pp.171-182
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OMC improvements and prospects for 2015
/ Langner, A (CERN) ; Bach, T (CERN) ; Levinsen Y (CERN) ; Maclean, E (CERN) ; Maier, V (CERN) ; Martinez Vazquez, J (CERN) ; Mcateer, M (CERN) ; Persson, T (CERN) ; Skowronski, P (CERN) ; Tomas, R (CERN) et al.
LHC 2015 operation requires more precise and more efficient optics measurements
and corrections. Improvements in these directions are presented including a
potential coupling feedback based on DOROS. [...]
Geneva : CERN, 2014 - 6 p.
- Published in : (2014) , pp. 199-204
Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.199-204
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Transverse emittance through the LHC cycle - an update
/ Kuhn, M (CERN ; Hamburg U.) ; Arduini, G (CERN) ; Kain, V (CERN) ; Langner, A (CERN ; Hamburg U.) ; Papaphilippou, Y (CERN) ; Papotti, G (CERN) ; Schaumann, M (CERN) ; Tomas, R (CERN)
During LHC Run 1 about 30 % of the potential peak performance was lost due to
transverse emittance blow-up through the LHC cycle. Measurements indicated that
the majority of the blow-up occurred during the injection plateau and the energy
ramp probably due to Intra Beam Scattering (IBS). [...]
Geneva : CERN, 2014 - 6 p.
- Published in : (2014) , pp. 47-52
Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.47-52
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Optics model
/ Langner, A (CERN ; Hamburg U.) ; Carlier, F (CERN) ; Coello De Portugal, J (CERN) ; Garcia-Tabares Valdivieso,A (CERN) ; Maclean, E H (CERN) ; Malina, L (CERN) ; Persson, T H B (CERN) ; Skowronski, P K (CERN) ; Tomás, R (CERN)
The LHC optics quality after the 2015 commissioning is reviewed. Optics
corrections were limited due to a variety of problems. [...]
Geneva : CERN, 2016 - 6 p.
- Published in : (2016) , pp. 65-70
Fulltext: PDF;
In : 6th Evian Workshop on LHC beam operation, Evian Les Bains, France, 15 - 17 Dec 2015, pp.65-70
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Optics control in 2016
/ Persson, T (CERN) ; Baud, G (CERN) ; Carlier, F (CERN) ; Coello De Portugal, J ; Fol, E ; A ; Valdivieso, Garcia-Tabares ; Gasior, M ; Langner, A ; Maclean, E H et al.
In 2016 the fi-functions at the interaction points of ATLAS and CMS have been squeezed down to 0.4 m. This is below the design fi" = 0.55 m at 7 TeV and has been instrumental to surpass the design luminosity. [...]
Geneva : CERN, 2017 - 6 p.
- Published in : (2017) , pp. 77-82
Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.77-82
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MD 979: Beta-beating measurements on colliding beams
/ Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) et al.
The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. [...]
CERN-ACC-NOTE-2017-0060.
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2017. - 13 p.
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10.
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Optics Measurements and Correction Challenges for the HL-LHC
/ Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (University of Applied Sciences (DE)) ; Gamba, Davide (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Giovannozzi, Massimo (CERN) ; Hofer, Michael (Vienna University of Technology (AT)) ; Langner, Andy Sven (CERN) ; Maclean, Ewen Hamish (CERN) et al.
Optics control in the HL-LHC will be challenged by a very small β* of 15 cm in the two main experiments [...]
CERN-ACC-2017-0088.
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2017. - 58 p.
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