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CERN Document Server 90 records found  beginanterior81 - 90  jump to record: Search took 0.97 seconds. 
81.
MD 754: Instability Threshold for Train with 25ns Spacing / Carver, Lee Robert (CERN) ; Astapovych, Daria ; Biancacci, Nicolo (CERN) ; Iadarola, Giovanni (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Wang, Na
Measurements made since the beginning of run II at 6.5 TeV have shown that there is a large discrepancy in the instability thresholds between single bunches and trains of 72 bunches with 25ns spacing, whereas the same result is expect for pure impedance-induced instabilities. [...]
CERN-ACC-NOTE-2016-0022.
- 2016. - 9 p.
Full text
82.
β*-Reach – IR7 Collimation Hierarchy Limit and Impedance / Mereghetti, Alessio (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (CERN) ; Kwee-Hinzmann, Regina (University of London (GB)) ; Metral, Elias (CERN) ; Mirarchi, Daniele (CERN) ; Quaranta, Elena (Politecnico di Milano (IT)) ; Redaelli, Stefano (CERN) ; Rossi, Adriana (CERN) et al.
This report summarises the results of the MD314 about the hierarchy limit of the IR7 collimation system and its impedance. [...]
CERN-ACC-NOTE-2016-0007.
- 2016. - 15 p.
Full text
83.
MD 755: Instability threshold and tune shift study with reduced retraction between primary and secondary collimators in IR7 / Carver, Lee Robert (CERN) ; Biancacci, Nicolo (CERN) ; Mereghetti, Alessio (CERN) ; Bruce, Roderik (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Nisbet, David (CERN) ; Redaelli, Stefano (CERN) ; Salvachua Ferrando, Belen Maria (CERN)
The purpose of this MD is to quantify in terms of stabilising octupole current threshold the impedance change when reducing the retraction between the primary and secondary collimators in IR7. [...]
CERN-ACC-NOTE-2016-0005.
- 2016. - 9 p.
Full text
84.
MD 751: Train Instability Threshold / Carver, Lee Robert (CERN) ; Biancacci, Nicolo (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Nisbet, David (CERN) ; Zobov, M (INFN-LNF Rome Italy)
The purpose of this MD is to measure the octupole current thresholds for stability for a single bunch, and then make an immediate comparison (with the same operational settings) for a train of 72 bunches separated by 25ns. [...]
CERN-ACC-NOTE-2016-0004.
- 2016. - 9 p.
Full text
85.
MD 349: Impedance Localization with AC-dipole / Biancacci, Nicolo (CERN) ; Carver, Lee Robert (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Papotti, Giulia (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
The purpose of this MD is to measure the distribution of the transverse impedance of the LHC by observing the phase advance variation with intensity between the machine BPMs. [...]
CERN-ACC-NOTE-2016-0003.
- 2016. - 7 p.
Full text
86.
MD 346: Summary of single bunch instability threshold measurements / Carver, Lee Robert (CERN) ; Biancacci, Nicolo (CERN) ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Levens, Tom (University of Glasgow (GB)) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (CERN) ; Tambasco, Claudia (Ecole Polytechnique Federale de Lausanne (CH)) ; Trad, Georges (CERN)
The purpose of this MD is to measure the octupole current threshold to reach single-bunch stability in the LHC at flat top. [...]
CERN-ACC-NOTE-2016-0002.
- 2016. - 8 p.
Full text
87.
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
88.
The PS Upgrade Programme: Recent Advances / Gilardoni, Simone (CERN) ; Bart Pedersen, Stephane (CERN) ; Bertone, Caterina (CERN) ; Biancacci, Nicolo (CERN) ; Blas, Alfred (CERN) ; Bodart, Dominique (CERN) ; Borburgh, Jan (CERN) ; Chiggiato, Paolo (CERN) ; Damerau, Heiko (CERN) ; Damjanovic, Sanja (CERN) et al.
The LHC Injectors Upgrade project (LIU) has been initiated to improve the performances of the existing injector complex at CERN to match the future requirements of the HL-LHC. In this framework, the Proton Synchrotron (PS) will undergo fundamental changes for many of its main systems: the injection energy will be increased to reduce space-charge effects, the transverse damper will be improved to cope with transverse instabilities the RF systems will be upgraded to accelerate higher beam intensity and brightness. [...]
2013 - 3 p. - Published in : (2013) , pp. WEPEA042 Fulltext: PDF; External link: Published version from JACoW
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.2594
89.
Improved techniques of impedance calculation and localization in particle accelerators / Biancacci, Nicolò
In this thesis we mainly focus on particle accelerators applied to high energy physics research where a fundamental parameter, the luminosity, is maximized in order to increase the rate of particle collisions useful to particle physicists [...]
CERN-THESIS-2014-043 - 136.

90.
Localization of transverse impedance sources in the SPS using HEADTAIL macroparticle simulations / Biancacci, Nicolo
In accelerators, impedances are one of the main contributors to instability phenomena that lead to particle losses and beam quality deterioration [...]
CERN-THESIS-2010-166 - Rome : Rome U., 2010 - 67.


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