CERN Accelerating science

All CERN Accelerators documents

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2017-04-26
06:55
CERN Proton Synchrotron booster space charge simulations with a realistic model for alignment and field errors / Forte, V (CERN ; U. Blaise Pascal, Clermont-Ferrand) ; Benedetto, E (CERN) ; McAteer, M (CERN)
The CERN Proton Synchrotron booster (PSB) is one of the machines of the LHC injector chain which will be upgraded within the LHC Injectors Upgrade (LIU) project. The injection energy of the PSB will be increased to 160 MeV in order to mitigate direct space charge effects, considered to be the main performance limitation, aiming to double the brightness for the LHC beams. [...]
2016 - 12 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 124202 Fulltext: PDF;

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2017-04-26
06:54
Projects for ultra-high-energy circular colliders at CERN / Bogomyagkov, A V (Novosibirsk, IYF) ; Koop, I A (Novosibirsk, IYF) ; Levichev, E B (Novosibirsk, IYF) ; Piminov, P A (Novosibirsk, IYF) ; Sinyatkin, S V (Novosibirsk, IYF) ; Shatilov, D N (Novosibirsk, IYF) ; Benedict, M (CERN) ; Oide, K (KEK, Tsukuba) ; Zimmermann, F (CERN)
Within the Future Circular Collider (FCC) design study launched at CERN in 2014, it is envisaged to construct hadron (FCC-hh) and lepton (FCC-ee) ultra-high-energy machines aimed to replace the LHC upon the conclusion of its research program. The Budker Institute of Nuclear Physics is actively involved in the development of the FCC-ee electron–positron collider. [...]
2016 - 6 p. - Published in : Phys. Part. Nucl. Lett. 13 (2016) 870-875 External link: Fulltext

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2017-04-26
06:54
High energy density physics effects predicted in simulations of the CERN HiRadMat beam–target interaction experiments / Tahir, N A (Darmstadt, GSI) ; Burkart, F (CERN) ; Schmidt, R (CERN) ; Shutov, A (IPCP, Chernogolovka) ; Wollmann, D (CERN) ; Piriz, A R (Castilla-La Mancha U.)
Experiments have been done at the CERN HiRadMat (High Radiation to Materials) facility in which large cylindrical copper targets were irradiated with 440 GeV proton beam generated by the Super Proton Synchrotron (SPS). The primary purpose of these experiments was to confirm the existence of hydrodynamic tunneling of ultra-relativistic protons and their hadronic shower in solid materials, that was predicted by previous numerical simulations. [...]
2016 - 8 p. - Published in : High Energy Dens. Phys. 21 (2016) 27-34

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2017-04-26
06:54
Design and optimization of Compact Linear Collider main linac accelerating structure / Zha, Hao (CERN) ; Grudiev, Alexej (CERN)
The Compact Linear Collider (CLIC) main linac uses waveguide damped structure as its baseline design. The current baseline structure design written in the CLIC Conceptual Design Report is named “CLIC-G.” Recent activities on the CLIC-G design including high power tests on structure prototypes and the study of machining cost assessment had raised the need of reoptimizing the structure design to minimize the machining cost and the pulse surface temperature rise. [...]
2016 - 12 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 111003 Fulltext: PDF;

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2017-04-26
06:54
Radiation damage and thermal shock response of carbon-fiber-reinforced materials to intense high-energy proton beams / Simos, N (RIKEN BNL) ; Zhong, Z (RIKEN BNL) ; Ghose, S (RIKEN BNL) ; Kirk, H G (RIKEN BNL) ; Trung, L-P (RIKEN BNL) ; McDonald, K T (Princeton U.) ; Kotsina, Z (Athens U.) ; Nocera, P (Rome U.) ; Assmann, R (CERN) ; Redaelli, S (CERN) et al.
A comprehensive study on the effects of energetic protons on carbon-fiber composites and compounds under consideration for use as low-Z pion production targets in future high-power accelerators and low-impedance collimating elements for intercepting TeV-level protons at the Large Hadron Collider has been undertaken addressing two key areas, namely, thermal shock absorption and resistance to irradiation damage. Carbon-fiber composites of various fiber weaves have been widely used in aerospace industries due to their unique combination of high temperature stability, low density, and high strength. [...]
FERMILAB-PUB-16-566-AD.- 2016 - 20 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 111002 Fulltext: 10.1103_PhysRevAccelBeams.19.111002 - PDF; fermilab-pub-16-566-ad - PDF; openaccess_PhysRevAccelBeams.19.111002 - PDF; External link: FERMILABPUB

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2017-04-26
06:54
Precision magnetic field mapping for CERN experiment NA62 / Fry, John R (Liverpool U.) ; Ruggiero, Giuseppe (Liverpool U. ; CERN) ; Bergsma, Felix (CERN)
In the CERN experiment NA62, low-mass straw-tube tracking-chambers have been designed to operate in vacuum and, in conjunction with precisely mapped magnetic fields, enable the determination of the trajectories of the charged decay products of a 75 GeV/c K(+) with high accuracy. This is particularly important for the crucial measurement of the branching fraction for the decay K(+) → π (+) ν ν, which has the potential to reveal BSM physics. [...]
2016 - 19 p. - Published in : Czechoslov. J. Phys. G 43 (2016) 125004

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2017-04-26
06:54
Long term dynamics of the high luminosity Large Hadron Collider with crab cavities / Barranco García, J (EPFL-ISIC, Lausanne ; CERN) ; De Maria, R (CERN) ; Grudiev, A (CERN) ; Tomás García, R (CERN) ; Appleby, R  B (Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.) ; Brett, D  R (Cockcroft Inst. Accel. Sci. Tech. ; Manchester U.)
The High Luminosity upgrade of the Large Hadron Collider (HL-LHC) aims to achieve an integrated luminosity of 200–300  fb-1 per year, including the contribution from the upgrade of the injector chain. For the HL-LHC the larger crossing angle together with a smaller beta function at the collision point would result in more than 70% luminosity loss due to the incomplete geometric overlap of colliding bunches. [...]
2016 - 9 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 101003 Fulltext: PDF;

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2017-04-26
06:54
Probing half $β^*_y$ optics in the Accelerator Test Facility 2 / Patecki, M (CERN) ; Bett, D (CERN) ; Marin, E (CERN) ; Plassard, F (CERN) ; Tomás, R (CERN) ; Kubo, K (Sokendai, Tsukuba ; KEK, Tsukuba) ; Kuroda, S (Sokendai, Tsukuba ; KEK, Tsukuba) ; Naito, T (Sokendai, Tsukuba ; KEK, Tsukuba) ; Okugi, T (Sokendai, Tsukuba ; KEK, Tsukuba) ; Tauchi, T (Sokendai, Tsukuba ; KEK, Tsukuba) et al.
A nanometer beam size at the interaction point (IP) is required for future linear colliders to achieve the desired rate of particle collisions. KEK Accelerator Test Facility 2 (ATF2), a scaled down implementation of the linear collider beam delivery system, serves for demonstrating the feasibility of the final focus system (FFS). [...]
2016 - 9 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 101001 Fulltext: 10.1103_PhysRevAccelBeams.19.101001 - PDF; PhysRevAccelBeams.19 - PDF;

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2017-04-26
06:54
Utilizing the N beam position monitor method for turn-by-turn optics measurements / Langner, A (CERN ; Hamburg U.) ; Benedetti, G (ATIPIC) ; Carlà, M (ATIPIC) ; Iriso, U (ATIPIC) ; Martí, Z (ATIPIC) ; de Portugal, J Coello (CERN) ; Tomás, R (CERN)
The N beam position monitor method (N-BPM) which was recently developed for the LHC has significantly improved the precision of optics measurements that are based on BPM turn-by-turn data. The main improvement is due to the consideration of correlations for statistical and systematic error sources, as well as increasing the amount of BPM combinations which are used to derive the β-function at one location. [...]
2016 - 6 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 092803 Fulltext: PDF;

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2017-04-26
06:54
Performance analysis of superconducting rf cavities for the CERN rare isotope accelerator / Calatroni, S (CERN) ; Miyazaki, A (CERN) ; Rosaz, G (CERN) ; Sublet, A (CERN) ; Venturini Delsolaro, W (CERN) ; Vaglio, R (CNR-SPIN, Naples ; INFN, Naples) ; Palmieri, V (INFN, Legnaro)
The first cryomodule of the new HIE-ISOLDE rare isotope accelerator has recently been commissioned with beam at CERN, with the second cryomodule ready for installation. Each cryomodule contains five superconducting low-beta quarter wave cavities, produced with the technology of sputtering a thin niobium film onto the copper substrate (Nb/Cu). [...]
2016 - 7 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 092002 Fulltext: PDF;

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