2019-04-17
07:03 |
Single Bunch Instabilities in FCC-ee
/ Belli, Eleonora (CERN) ; Castorina, Giovanni (INFN, Rome) ; Migliorati, Mauro (INFN, Rome) ; Rumolo, Giovanni (CERN) ; Spataro, Bruno (Frascati) ; Zobov, Mikhail (Frascati)
FCC-ee is a high luminosity lepton collider with a centre-of-mass energy from 91 to 365 GeV. Due to the machine parameters and pipe dimensions, collective effects due to electromagnetic fields produced by the interaction of the beam with the vacuum chamber can be one of the main limitations to the machine performance. [...]
IPAC-2018-THPAK052.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAK052
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.3336-3339
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2019-04-17
07:03 |
Studies of Longitudinal Dynamics in the Micro-Bunching Instability Using Machine Learning
/ Boltz, Tobias (KIT, Karlsruhe) ; Brosi, Miriam (KIT, Karlsruhe) ; Bründermann, Erik (KIT, Karlsruhe) ; Müller, Anke-Susanne (KIT, Karlsruhe) ; Schwarz, Markus (CERN) ; Schönfeldt, Patrik (KIT, Karlsruhe) ; Yan, Minjie (KIT, Karlsruhe)
The operation of synchrotron light sources with short electron bunches increases the emitted CSR power in the THz frequency range. However, the spatial compression leads to complex longitudinal dynamics, causing the formation of micro-structures in the longitudinal bunch profiles. [...]
2018 - 3 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAK030
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK030
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2019-04-16
12:51 |
Physics opportunities for a fixed-target programme in the ALICE experiment
/ Galluccio, Francesca (Universita e sezione INFN di Napoli (IT)) ; Hadjidakis, Cynthia (Centre National de la Recherche Scientifique (FR)) ; Kurepin, Alexander (Institute for Nuclear Research, Moscow) ; Massacrier, Laure (Centre National de la Recherche Scientifique (FR)) ; Porteboeuf, S (Centre national de la recherche scientifique (FR)) ; Pressard, Kevin (Centre national de la recherche scientifique (FR)) ; Scandale, Walter (CERN) ; Topilskaya, Natalia (Institute for Nuclear Research, Moscow) ; Trzeciak, Barbara (Utrecht University) ; Uras, Antonio (Centre national de la recherche scientifique (FR)) et al.
A fixed-target programme in the ALICE experiment using the LHC proton and lead beams offers many physics opportunities related to the parton content of the nucleon and nucleus at high-$x$, the nucleon spin and the Quark-Gluon Plasma. We investigate two solutions that would allow ALICE to run in a fixed-target mode: the internal solid target coupled to a bent crystal and the internal gas target. [...]
CERN-PBC-Notes-2019-004.-
Geneva : CERN, 2019
- Published in : link to original file in ESPP strategy update
PDF document submitted to ESPP strategy update: PDF;
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2019-04-16
09:15 |
Design of the New Proton Synchrotron Booster Absorber Scraper (PSBAS) in the Framework of the Large Hadron Collider Injection Upgrade (LIU) Project
/ Teofili, Lorenzo (U. Rome La Sapienza (main) ; CERN ; INFN, Rome) ; Briz Monago, Jose (CERN) ; Calviani, Marco (CERN) ; Chritin, Nicolas (CERN) ; Esala, Jaakko (CERN) ; Gilardoni, Simone (CERN) ; Lamas Garcia, Inigo (CERN) ; Maestre, Jorge (CERN) ; Migliorati, Mauro (U. Rome La Sapienza (main) ; CERN ; INFN, Rome) ; Polzin, Tobias (CERN) et al.
The Large Hadron Collider (LHC) Injector Upgrade (LIU) Project at CERN calls for increasing beam intensity for the LHC accelerator chain. Some machine components will not survive the new beam characteristics and need to be rebuilt for the new challenging scenario. [...]
2018 - 4 p.
- Published in : (2018) , pp. THPAK091
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 8, pp. 082027
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK091
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2019-04-16
09:15 |
Resonance Identification Studies at the CERN PS
/ Asvesta, Foteini (Natl. Tech. U., Athens ; CERN) ; Bartosik, Hannes (CERN) ; Huschauer, Alexander (CERN) ; Papaphilippou, Yannis (CERN) ; Sterbini, Guido (CERN)
In view of the LHC Injectors Upgrade (LIU) and the challenging high brightness target beam parameters, a broad range of possible working points for the Proton Synchrotron (PS) is being investigated. High order resonances have been identified, both structural resonances driven by space charge due to the lattice harmonics of the PS, and resonances excited by multipolar components in the machine. [...]
2018 - 4 p.
- Published in : (2018) , pp. THPAK056
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 6, pp. 062021
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK056
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2019-04-13
06:01 |
Plasma wakefield acceleration experiments at FACET II
/ Joshi, C (UCLA) ; Adli, E (Oslo U.) ; An, W (UCLA) ; Clayton, C E (UCLA) ; Corde, S (Palaiseau, Lab. Opt. Appl.) ; Gessner, S (CERN) ; Hogan, M J (SLAC) ; Litos, M (Colorado U.) ; Lu, W (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Marsh, K A (UCLA) et al.
During the past two decades of research, the ultra-relativistic beam-driven plasma wakefield accelerator (PWFA) concept has achieved many significant milestones. These include the demonstration of ultra-high gradient acceleration of electrons over meter-scale plasma accelerator structures, efficient acceleration of a narrow energy spread electron bunch at high-gradients, positron acceleration using wakes in uniform plasmas and in hollow plasma channels, and demonstrating that highly nonlinear wakes in the 'blow-out regime' have the electric field structure necessary for preserving the emittance of the accelerating bunch. [...]
2018 - 14 p.
- Published in : Plasma Phys. Control. Fusion 60 (2018) 034001
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2019-04-13
06:00 |
Assessment of Linear and Non-Linear Optics Errors due to Beam-Beam with Multipoles for the High Luminosity LHC
/ Medina Medrano, Luis (Guanajuato U. ; CERN) ; Barranco García, Javier (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne) ; Tomás, Rogelio (CERN)
Study of the head-on and long-range beam-beam effects in the High Luminosity LHC (HL-LHC) is of interest to evaluate their potential impact on performance (in the form of luminosity imbalance) and machine operation (collimator system), and, depending on their magnitude, correction schemes might be necessary to minimize them. In this work, both the β-beating at zero amplitude and its amplitude-dependence are computed for the current HL-LHC baseline optics and parameters, as well as the amplitude detuning, at the main interaction points and collimators. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAK135
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK135
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2019-04-13
06:00 |
A Multi-Physics Approach to Simulate the RF Heating 3D Power Map Induced by the Proton Beam in a Beam Intercepting Device
/ Teofili, Lorenzo (U. Rome La Sapienza (main) ; INFN, Rome ; CERN) ; Migliorati, Mauro (U. Rome La Sapienza (main) ; INFN, Rome ; CERN) ; Carbajo Perez, David (CERN) ; Giordano, Francesco (CERN) ; Lamas Garcia, Inigo (CERN) ; Mazzacano, Giacomo (CERN)
The project High Luminosity Large Hadron Collider (HL-LHC) calls for a streaking beam intensity and brightness in the LHC machine. In such a scenario, beam-environment electromagnetic interactions are a crucial topic: they could lead to uneven power deposition in machine equipment. [...]
2018 - 4 p.
- Published in : (2018) , pp. THPAK093
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 6, pp. 062012
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK093
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2019-04-13
06:00 |
Analysis on the Mechanical Effects Induced by Beam Impedance Heating on the HL-LHC Target Dump Injection Segmented (TDIS) Absorber
/ Teofili, Lorenzo (U. Rome La Sapienza (main) ; INFN, Rome ; CERN) ; Migliorati, Mauro (U. Rome La Sapienza (main) ; CERN ; INFN, Rome) ; Calviani, Marco (CERN) ; Carbajo Perez, David (CERN) ; Gilardoni, Simone (CERN) ; Giordano, Francesco (CERN) ; Lamas Garcia, Inigo (CERN) ; Mazzacano, Giacomo (CERN) ; Perillo-Marcone, Antonio (CERN)
The High Luminosity Large Hadron Collider (HL-LHC) Project at CERN calls for increasing beam brightness and intensity. In such a scenario, critical accelerator devices need to be redesigned and rebuilt. [...]
2018 - 4 p.
- Published in : (2018) , pp. THPAK092
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 6, pp. 062011
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK092
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2019-04-12
06:24 |
Dosimetry Mapping of Mixed-Field Radiation Environment Through Combined Distributed Optical Fiber Sensing and FLUKA Simulation
/ Di Francesca, Diego (CERN) ; Infantino, Angelo (CERN) ; Li Vecchi, Gaetano (CERN ; Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Girard, Sylvain (Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Alessi, Antonino (Jean Monnet U. ; Lab. Hubert Curien, St. Etienne) ; Kadi, Yacine (CERN) ; Brugger, Markus (CERN)
Distributed optical fiber (OF) radiation sensing is a technique recently adopted at CERN for the monitoring of radiation dose levels in the proton synchrotron (PS) booster and in the PS. In this paper, we present the progress made on our previous work by benchmarking the rich information contained in the spatially distributed OF dose measurement with the radiation levels simulated with the FLUKA Monte Carlo code. [...]
2018 - 7 p.
- Published in : IEEE Trans. Nucl. Sci. 66 (2019) 299-305
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