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CERN Document Server Encontrados 46 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.51 segundos. 
1.
MD 3292: Measurements of Landau Damping by Means of BTF Measurements / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; Gasior, Marek (CERN) ; Levens, Tom (CERN) ; Mereghetti, Alessio (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) et al.
The methodology applied in previous MDs has shown the possibility of using BTFs measurements to estimate the transverse Landau Damping of the beams for different machine configurations. [...]
CERN-ACC-NOTE-2019-0045. - 2019. - 10 p.
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2.
MD 3290: Instability threshold measurements in the presence of a controlled external excitation / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Barranco, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Metral, Elias (CERN) ; Mounet, Nicolas (CERN) ; Levens, Tom (CERN) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH))
During the MD 2722 an unexpected instability was observed at flat top energy during BTF measurements. [...]
CERN-ACC-NOTE-2019-0044. - 2019. - 6 p.
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3.
Studies of PACMAN effects in the HL-LHC / Ribes Metidieri, Ariadna (University of Barcelona (ES)) ; Buffat, Xavier (CERN)
This note summarises the status of the studies on PACMAN beam-beam effects in the HL-LHC project. [...]
CERN-ACC-NOTE-2019-0037. - 2019. - 34 p.
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4.
Mode coupling instability of colliding beams in the HL-LHC / Barraud, Laurent (Johann-Wolfgang-Goethe Univ. (DE)) ; Buffat, Xavier (CERN)
The coupling between the coherent beam-beam modes and the head-tail modes can result in strong instabilities under the effect of electromagnetic wake fields [...]
CERN-ACC-NOTE-2019-0032. - 2019. - 19 p.
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5.
Status of the studies on collective effects involving beam-beam interactions at the HL-LHC / Buffat, Xavier (CERN) ; Barraud, Laurent (Universite Pierre et Marie Curie et Universite Denis Diderot (FR)) ; Metral, Elias (CERN) ; Ribes Metidieri, Ariadna (University of Barcelona (ES)) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Goncalves Jorge, Patrik ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH))
This note summarised the status of the studies on the coherent beam-beam effects in the HL-LHC project. [...]
CERN-ACC-NOTE-2018-0036. - 2018. - 24 p.
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6.
MD 2197: Experimental studies of Landau damping by means of Beam Transfer Function measurements in the presence of beam-beam interactions and diffusive mechanisms / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Barros Marin, Manoel (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Boccardi, Andrea (CERN) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; Gasior, Marek (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Lefevre, Thibaut (CERN) ; Louro Alves, Diogo Miguel (CERN) et al.
Beam Transfer Function (BTF) measurements are direct measurement of the stability diagrams that define the stability threshold of coherent beam instabilities driven by the impedance. [...]
CERN-ACC-NOTE-2018-0017. - 2018. - 8 p.
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7.
MD 2722: Investigation of Landau damping by means of BTF measurements / Tambasco, Claudia (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Barros Marin, Manoel (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Boccardi, Andrea (CERN) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; Gasior, Marek (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Lefevre, Thibaut (CERN) ; Levens, Tom (CERN) et al.
Stability diagrams quantify the LHC stability thresholds due to the beam coupling impedance. [...]
CERN-ACC-NOTE-2018-0016. - 2018. - 9 p.
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8.
Global compensation of long-range beam-beam effects with octupole magnets: dynamic aperture simulations for the HL-LHC case and possible usage in LHC and FCC. / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Pieloni, Tatiana (Ecole Polytechnique Federale de Lausanne)
The Large Hadron Collider has shown with various experimental verifications that one of the main limitations to the collider performance and to a possible upgrade can come from the long-range beam-beam effects which will define the operational parameters (intensities and emittances) and machine set-up (crossing angles and the minimum beta function at the interaction points). [...]
CERN-ACC-NOTE-2017-0036. - 2017.
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9.
Dynamic Aperture Studies for HL-LHC with beam-beam effects / Pieloni, Tatiana (Paul Scherrer Institut (CH)) ; Banfi, Danilo ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH))
Various possible operational scenarios are foreseen for the High Luminosity Large Hadron Collider (HL-LHC). [...]
CERN-ACC-NOTE-2017-0035. - 2017.
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10.
Beam Instabilities in Hadron Synchrotrons / Métral, E (CERN) ; Argyropoulos, T (CERN) ; Bartosik, H (CERN) ; Biancacci, N (CERN) ; Buffat, X (CERN) ; Esteban Muller, J F (CERN) ; Herr, W (CERN) ; Iadarola, G (CERN) ; Lasheen, A (CERN) ; Li, K (CERN) et al.
Beam instabilities cover a wide range of effects in particle accelerators and they have been the subjects of intense research for several decades. As the machines performance was pushed new mechanisms were revealed and nowadays the challenge consists in studying the interplays between all these intricate phenomena, as it is very often not possible to treat the different effects separately. [...]
FERMILAB-PUB-15-646-APC.- 2016 - 50 p. - Published in : IEEE Trans. Nucl. Sci. 63 (2016) 1001-1050 Fulltext: PDF;
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