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Buffat, Xavier - 検索結果 - CERN Document Server

CERN Accelerating science

CERN Document Server 130 のレコードがつかりました。  1 - 10次最後  レコードへジャンプ: 検索けんさくにかかった時間じかん: 0.60 びょう 
1.
Mitigating Collimation Impedance and Improving Halo Cleaning with New Optics and Settings Strategy of the HL-LHC Betatron Collimation System / Lindström, Bjorn (CERN) ; Bruce, Roderik (CERN) ; Buffat, Xavier (CERN) ; De Maria, Riccardo (CERN) ; Giacomel, Lorenzo (CERN) ; Hermes, Pascal (CERN) ; Mirarchi, Daniele (CERN) ; Mounet, Nicolas (CERN) ; Persson, Tobias (CERN) ; Redaelli, Stefano (CERN) et al.
With High Luminosity Large Hadron Collider (HL-LHC) beam intensities, there are concerns that the beam losses in the dispersion suppressors around the betatron cleaning insertion might exceed the quench limits. Furthermore, to maximize the beam lifetime it is important to reduce the impedance as much as possible. [...]
2024 - 5 p. - Published in : JACoW HB 2023 (2024) 183-187 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.183-187
2.
Slow vs Fast Landau Damping Threshold Measurement at the LHC and Implications for the HL-LHC / Buffat, Xavier (CERN) ; Giacomel, Lorenzo (CERN) ; Mounet, Nicolas (CERN)
The mechanism of Loss of Landau Damping by Diffusion (L2D2) was observed in dedicated experiments at the LHC using a controlled external source of noise. Nevertheless, the predictions of stability threshold by L2D2 models are plagued by the poor knowledge of the natural noise floor affecting the LHC beams. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 470-473 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.470-473
3.
Beam-beam interaction-induced bias to precision luminosity measurement / Wanczyk, Joanna (CERN ; Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Dabrowski, Anne (CERN) ; Kozanecki, Witold (IRFU, Saclay) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Stickland, David (Princeton U.) ; Tomas Garcia, Rogelio (CERN) ; Wu, Yi (Ecole Polytechnique, Lausanne)
The mutual electromagnetic interaction between counter-rotating bunches crossing at the interaction points (IPs) of a particle collider has been studied since the dawn of the storage-ring era. It can result in a significant bias to absolute-luminosity calibrations determined by the van der Meer (vdM) method. [...]
2024 - 8 p. - Published in : PoS EPS-HEP2023 (2024) 624 Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023, pp.624
4.
Impact of bunch intensity asymmetry in colliders featuring strong beamstrahlung / Le Nguyen Nguyen, Khoi (CERN ; EPFL-ISIC, Lausanne ; Cambridge U.) ; Buffat, Xavier (CERN) ; Kicsiny, Peter (CERN ; EPFL-ISIC, Lausanne) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne)
An analytical investigation of beamstrahlung-induced blow-up in Gaussian beams with arbitrary dimensions is presented, using various approximations for the strength of the hourglass effect and crab waist scheme. [...]
arXiv:2404.09012.
- 25 p.
Fulltext
5.
Measurement of emittance growth and oscillation spectrum for different damper gains (MD 9407) / Buffat, Xavier (CERN) ; Fornara, Andrea (University of Manchester (GB)) ; Giacomel, Lorenzo (CERN) ; Kostoglou, Sofia (CERN) ; Lannoy, Christophe (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Mounet, Nicolas (CERN) ; Radoslavova, Anna Valeri (Heidelberg University (DE)) ; Sterbini, Guido (CERN) ; Valuch, Daniel (CERN)
The procedure of an experiment aiming at studying the impact of the transverse damper gain on the beam oscillation spectrum and on the emittance growth of colliding beams is described along with the corresponding results. [...]
CERN-ACC-NOTE-2024-0007.
- 2024.
Full text
6.
Octupole threshold with trains of bunches (MD 9403) / Buffat, Xavier (CERN) ; Giacomel, Lorenzo (CERN) ; Rumolo, Giovanni (CERN) ; Mether, Lotta (CERN) ; Mounet, Nicolas (CERN) ; Paraschou, Konstantinos (CERN)
We describe an experiment aiming at determining the stability threshold in terms of octupole current for bunch trains at flat top in the LHC. [...]
CERN-ACC-NOTE-2024-0006.
- 2024.
Full text
7.
Towards Beam-Beam Simulations for FCC-ee / Kicsiny, Peter (CERN ; Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Iadarola, Giovanni (CERN) ; Pieloni, Tatiana (EPFL-ISIC, Lausanne) ; Schulte, Daniel (CERN) ; Seidel, Mike (Ecole Polytechnique, Lausanne ; PSI, Villigen)
The FCC-ee (Future Circular Collider) lepton collider is currently the most favored next generation research infrastructure project at CERN, aimed at studying properties of standard model particles with the highest precision ever. The chosen parameters of the machine yield unprecedented conditions which give rise to previously unseen dynamical effects during collisions. [...]
2023 - 6 p. - Published in : JACoW eeFACT 2022 (2023) 165-170 Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.165-170
8.
Xsuite: an integrated beam physics simulation framework / Iadarola, Giovanni (CERN) ; Abramov, Andrey (CERN) ; Belanger, Philippe (TRIUMF) ; Buffat, Xavier (CERN) ; De Maria, Riccardo (CERN) ; Demetriadou, Despina (CERN) ; Deniau, Laurent (CERN) ; Di Croce, Davide (EPFL, Lausanne, FSL) ; Hermes, Pascal (CERN) ; Kicsiny, Peter (CERN) et al.
Xsuite is a newly developed modular simulation package combining in a single flexible and modern framework the capabilities of different tools developed at CERN in the past decades, notably Sixtrack, Sixtracklib, COMBI and PyHEADTAIL. The suite consists of a set of Python modules (Xobjects, Xpart, Xtrack, Xcoll, Xfields, Xdeps) that can be flexibly combined together and with other accelerator-specific and general-purpose python tools to study complex simulation scenarios. [...]
arXiv:2310.00317.- 2024-03-21 - 8 p. - Published in : JACoW HB 2023 (2024) TUA2I1 Fulltext: document - PDF; 2310.00317 - PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.TUA2I1
9.
HL-LHC configuration and operational challenges / Apollonio, Andrea (CERN) ; Buffat, Xavier (CERN) ; Bruce, Roderik (CERN) ; De Maria, Riccardo (CERN)
Recently, the operational configuration of the HL-LHC along its first Run has been carefully established to reach nominal performance. This chapter presents the key beam and machine parameters together with the most critical operational challenges. [...]
2023 - 26 p. - Published in : 10.1142/9789811280184_0006 Fulltext: PDF;
In : The future of the Large Hadron Collider, pp.95-120
10.
Chromaticity measurement using the beam transfer function (MD 6803) / Buffat, Xavier (CERN) ; Giacomel, Lorenzo (CERN) ; Mounet, Nicolas (CERN) ; Soderen, Martin
Chromaticity measurement at the LHC is based on energy modulation which is incompatible with high intensity beam operation. [...]
CERN-ACC-NOTE-2023-0014.
- 2023. - 10 p.
Full text

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