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Parthena Stefania

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Articles by Parthena Stefania

LHC Configuration and Operational Scenario for Run 3

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By Tomas Garcia, Solfaroli Camillocci, Tobias Hakan Bjorn, Parthena Stefania
| cds.cern.ch
Report number CERN-ACC-2021-0007 Title LHC Configuration and Operational Scenario for Run 3 Author(s) Fartoukh, Stephane (CERN) ; Kostoglou, Sofia (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Arduini, Gianluigi (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Brodzinski, Krzysztof (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; Calviani, Marco (CERN) ; Cerutti, Francesco (CERN) ; Efthymiopoulos, Ilias (CERN) ; Goddard, Brennan (CERN) ; Iadarola, Giovanni (CERN) ;...
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LHC Full Energy Exploitation Study: Operation at Ultimate Energy of 7.5 TeV

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By Tomas Garcia, De Maria, Rodriguez Mateos, Parthena Stefania
| cds.cern.ch
Report number CERN-ACC-2019-0015 Title LHC Full Energy Exploitation Study: Operation at Ultimate Energy of 7.5 TeV Download Embed Viewed by 17 users Author(s) Bruning, Oliver (CERN) ; Antipov, Sergey (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Arduini, Gianluigi (CERN) ; Apollonio, Andrea (CERN) ; Ball, Austin (CERN) ; Baglin, Vincent (CERN) ; Bartmann, Wolfgang (CERN) ; Battistin, Michele (CERN) ; Biancacci, Nicolo (CERN) ; Bottura, Luca (CERN) ; Calviani, Marco (CERN) ;...
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CERN Document Server

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By Manuel Angel, Parthena Stefania, Dominguez Martinez
| cds.cern.ch
The latest CLIC damping ring lattice is based on magnets with longitudinally variable dipole fields in order to achieve ultralow beam emittance while keeping the ring circumference small. These magnets need to provide a focusing gradient of 11 T/m as well. The good field region radius is 5 mm. The field harmonics shall be in the order of 1E-4 of the main one. Since only a small variation of the field is requested, permanent magnets are the most cost-effective solution.
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MD1271: Effect of low frequency noise on the evolution of the emittance and halo population

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By Parthena Stefania
| cds.cern.ch
For the High Luminosity upgrade the ?* in IR1 and IR5 will be further reduced compared to the current LHC. As the ?* decreases the ?-functions in the inner triplet (IT) increase resulting in a higher sensitivity of the HL-LHC to ground motion in the IT region or to increases of the low frequency noise. Noise can in general lead to emittance growth and higher halo population and diffusion rate.
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Impact of the ADT on the beam quality with high brightness beams in collision (MD2155)

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By Barranco Garcia, Solfaroli Camillocci, Parthena Stefania, David John
| cds.cern.ch
Internal Note Report number CERN-ACC-NOTE-2018-0005 Title Impact of the ADT on the beam quality with high brightness beams in collision (MD2155) Author(s) Buffat, Xavier (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Kostoglou, Sofia (National Technical Univ.
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Limitations due to strong head-on beam-beam interactions (MD 1434)

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By Sondre Vik, Barranco Garcia, Parthena Stefania, Salvachua Ferrando
| cds.cern.ch
Internal Note Report number CERN-ACC-NOTE-2017-0044 Title Limitations due to strong head-on beam-beam interactions (MD 1434) Author(s) Buffat, Xavier (CERN) ; Furuseth, Sondre Vik ; Iadarola, Giovanni (CERN) ; Papadopoulou, Parthena Stefania (University of Crete (GR)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Pojer, Mirko (CERN) ; Crockford, Guy (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Trad, Georges (CERN) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de...
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Effect of a resonant excitation on the evolution of the beam emittance and halo population

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By Parthena Stefania
| cds.cern.ch
Collimation with hollow electron beams or lenses (HEL) is currently one of the most promising concepts for active halo control in HL-LHC. In previous studies it has been shown that the halo can be efficiently removed with a hollow electron lens. Equally important as an efficient removal of the halo, is to demonstrate that the core stays unperturbed. In the case of an ideal hollow electron lens without bends, the field at the location of the beam core vanishes and the core remains unperturbed.
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CERN Document Server

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By Salvachua Ferrando, Belen Maria, Parthena Stefania
| cds.cern.ch
For the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC. As the β* decreases the β-functions in the inner triplet (IT) increase resulting in a higher sensitivity of the HL-LHC to ground motion in the IT region or to increases of the low frequency noise. Noise can in general lead to emittance growth and higher halo population and diffusion rate.
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