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CERN Document Server 2,046 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 0.43 secondi. 
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LHC MD 1279: Bunch Flattening in Physics / Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Esteban Muller, Juan ; Shaposhnikova, Elena (CERN)
Vertex reconstruction is not accurate enough for LHCb when the bunch length in physics shrinks below about 0.9 ns. [...]
CERN-ACC-NOTE-2017-0019. - 2017. - 13 p.
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LHC MD 1087: Controlled Longitudinal Emittance Blow-up with Short Bunches / Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Esteban Muller, Juan ; Jaussi, Michael (CERN) ; Lasheen, Alexandre (CERN) ; Shaposhnikova, Elena (CERN)
The aim of the MD was to study the controlled longitudinal emittance blow-up applied during the ramp with bunches that are slightly shorter than operational. [...]
CERN-ACC-NOTE-2017-0018. - 2017. - 7 p.
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LHC MD 232: Longitudinal Impedance Evaluation / Esteban Muller, Juan ; Timko, Helga (CERN) ; Baudrenghien, Philippe (CERN) ; Shaposhnikova, Elena (CERN)
The aim of the MDstudies presented here was to evaluate the imaginary part of the longitudinal impedance of the LHC by means of synchrotron frequency shift measurements [...]
CERN-ACC-NOTE-2017-0016. - 2017. - 6 p.
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LHC MD 652: Coupled-Bunch Instability with Smaller Emittance (all HOMs) / Esteban Muller, Juan ; shaposhnikova, Elena (CERN) ; Timko, Helga (CERN)
The aim of the MD was to measure the coupled-bunch stability from all HOM impedances, with a reduced longitudinal emittance in order to explore the HL-LHC conditions. [...]
CERN-ACC-NOTE-2017-0017. - 2017. - 6 p.
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Longitudinal intensity effects in the CERN Large Hadron Collider / Esteban Muller, Juan
This PhD thesis provides an improved knowledge of the LHC longitudinal impedance model and a better understanding of the longitudinal intensity effects [...]
CERN-THESIS-2016-066 - 149 p.

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HL-LHC Operational Scenarios / Metral, Elias (CERN) ; Arduini, Gianluigi (CERN) ; Banfi, Danilo (Ecole Polytechnique Federale de Lausanne) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Biancacci, Nicolo (CERN) ; Brüning, Oliver (CERN) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Höfle, Wolfgang (CERN) ; Li, Kevin (CERN) et al.
The main aim of this document is to have a clearly identified set of beam and machine parameters to be used for numerical simulations..
CERN-ACC-NOTE-2015-0009. - 2015. - 11 p.
CERN-ACC-NOTE-2015-0009 - Full text
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High-accuracy Diagnostic Tool for Electron Cloud Observation in the LHC based on Synchronous Phase Measurements / Esteban Müller, Juan (CERN) ; Baudrenghien, Philippe (CERN) ; Mastoridis, Themis (Cal. Poly.) ; Shaposhnikova, Elena (CERN) ; Valuch, Daniel (CERN)
Electron cloud effects, which include heat load in the cryogenic system, pressure rise, and beam instabilities, are among the main intensity limitations for the LHC operation with 25 ns spaced bunches. A new observation tool was proposed and developed to monitor the e-cloud activity and it has already been used successfully during the LHC run 1 (2010–2012) and it is being intensively used in operation during the start of the LHC run 2 (2015–2018). [...]
2015 - 11 p. - Published in : , pp. THPME174
- Published in : Phys. Rev. Spec. Top. Accel. Beams APS Open Access article: PDF; Fulltext: PDF; External link: JACOW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.THPME174
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LHC MDs 3163, 3164, and 3166: Injection oscillations throughout the cycle / Timko, Helga (CERN) ; Argyropoulos, Theodoros (CERN) ; Baudrenghien, Philippe (CERN) ; Calaga, Rama (CERN) ; Karpov, Ivan (CERN) ; Medina Medrano, Luis Eduardo (CERN) ; Peauger, Franck (CERN) ; Shaposhnikova, Elena (CERN) ; Turaj, Katarzyna (CERN)
This note summarizes three inter-related machine development sessions that were performed in the LHC in the course of 2018. [...]
CERN-ACC-NOTE-2019-0021. - 2019.
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Coupled-bunch instabilities due to fundamental cavity impedance / Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Baudrenghien, Philippe (CERN) ; Chapochnikova, Elena (CERN) ; Esteban Muller, Juan (CERN) ; Molendijk, John (CERN) ; Timko, Helga (CERN)
The purpose of this MD was to estimate the stability threshold due to longitudinal coupled-bunch instabilities (CBIs) driven by the RF cavities' fundamental impedance. [...]
CERN-ACC-NOTE-2017-0009. - 2017.
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Cavity Voltage Phase Modulation MD / Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Baudrenghien, Philippe (CERN) ; Molendijk, John (CERN) ; Timko, Helga (CERN)
The LHC RF/LLRF system is currently configured for extremely stable RF voltage to minimize transient beam loading effects. [...]
CERN-ACC-NOTE-2016-0061. - 2016. - 6 p.
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