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CERN Published Articles

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2021-09-20
08:48
Sympathetic cooling of a trapped proton mediated by an LC circuit / BASE Collaboration
Efficient cooling of trapped charged particles is essential to many fundamental physics experiments, to high-precision metrology and to quantum technology. Until now, sympathetic cooling has required close-range Coulomb interactions, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. [...]
2021 - 11 p. - Published in : Nature 596 (2021) 514-518 Fulltext: PDF;

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2021-09-20
08:48
Emittance and energy spread compensation for current and future low emittance synchrotron light sources / Hidas, D (Brookhaven Natl. Lab.) ; Shaftan, T (Brookhaven Natl. Lab.) ; Tanabe, T (Brookhaven Natl. Lab.) /National Synchrotron Light Source II Collaboration
This paper presents the results of an analysis focused on the behavior of emittance, energy spread and radiated power, as well as their variations in relation to the complement of active insertion devices in National Synchrotron Light Source II (NSLS-II) operations. The spectra of radiated power of the installed insertion devices and analytic values of the emittance are compared to that measured by the NSLS-II online diagnostics. [...]
2021 - 10 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 081601 Fulltext: PDF;

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2021-09-20
08:48
Ca$_3$Mn$_2$O$_7$ structural path unraveled by atomic-scale properties: A combined experimental and ab initio study / Rocha-Rodrigues, P (Porto U.) ; Santos, S S M (Porto U.) ; Miranda, I P (Sao Paulo U.) ; Oliveira, G N P (Porto U.) ; Correia, J G (Lisbon, IST) ; Assali, L V C (Sao Paulo U.) ; Petrilli, H M (Sao Paulo U.) ; Araújo, J P (Porto U.) ; Lopes, A M L (Porto U.)
The structural phase transition path from the low-temperature polar structure up to the highest symmetric phase in the hybrid improper ferroelectric Ca$_3$Mn$_2$O$_7$ compound is here investigated at atomic scale. Measurements using the perturbed angular correlation local probe technique are combined with ab initio electronic structure calculations to observe the evolution of the electric field gradient parameters at the Ca site within the 10–1200 K temperature range. [...]
2020 - 10 p. - Published in : Phys. Rev. B 101 (2020) 064103

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2021-09-20
08:48
Experimental and Theoretical Study of Electronic and Hyperfine Properties of Hydrogenated Anatase (TiO2): Defect Interplay and Thermal Stability / Zyabkin, D V (Palacky U. ; Ilmenau Tech. U.) ; Gunnlaugsson, H P (Iceland U.) ; Gonçalves, J N (Aveiro U.) ; Bharuth-Ram, K (KwaZulu Natal U. ; DUT, Durban) ; Qi, B (Iceland U.) ; Unzueta, I (Basque U., Bilbao) ; Naidoo, D (Witwatersrand U.) ; Mantovan, R (CNR-IMM, Catania) ; Masenda, H (Witwatersrand U.) ; Ólafsson, S (Iceland U.) et al.
The performance of TiO$_2$-based materials is highly dependent on the electronic structure and local defect configurations. Hence, a thorough understanding of defect interaction plays a key role. [...]
2020 - 12 p. - Published in : The Journal of Physical Chemistry C 124 (2020) 7511-7522

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2021-09-20
08:47
Ca$_2$MnO$_4$ structural path: Following the negative thermal expansion at the local scale / Rocha-Rodrigues, Pedro (Porto U.) ; Santos, Samuel S M (Porto U.) ; Oliveira, Gonçalo N P (Porto U.) ; Leal, Tiago (Porto U.) ; Miranda, Ivan P (Sao Paulo U.) ; dos Santos, António M (ORNL, Oak Ridge (main)) ; Correia, João G (Lisbon, IST) ; Assali, Lucy V C (Sao Paulo U.) ; Petrilli, Helena M (Sao Paulo U.) ; Araújo, João P (Porto U.) et al.
2020 - 9 p. - Published in : Phys. Rev. B 102 (2020) 104115

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2021-09-20
08:47
Evidence of a sudden increase in the nuclear size of proton-rich silver-96 / Reponen, M (Jyvaskyla U.) ; de Groote, R P (Jyvaskyla U.) ; Al Ayoubi, L (Jyvaskyla U. ; IJCLab, Orsay) ; Beliuskina, O (Jyvaskyla U.) ; Bissell, M L (Manchester U.) ; Campbell, P (Manchester U.) ; Cañete, L (Surrey U.) ; Cheal, B (Liverpool U.) ; Chrysalidis, K (CERN) ; Delafosse, C (Jyvaskyla U. ; IJCLab, Orsay) et al.
Understanding the evolution of the nuclear charge radius is one of the long-standing challenges for nuclear theory. Recently, density functional theory calculations utilizing Fayans functionals have successfully reproduced the charge radii of a variety of exotic isotopes. [...]
2021 - 8 p. - Published in : Nature Commun. 12 (2021) 4596 Fulltext: PDF;

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2021-09-20
08:47
Conceptual design of an off-momentum collimation system in the CERN Super Proton Synchrotron for High-Luminosity Large Hadron Collider proton beams / Patecki, Marcin (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The CERN accelerator complex is undergoing an upgrade in order to meet the requirements of the High-Luminosity Large Hadron Collider (HL-LHC). One of the key needs is to increase the intensity of beams injected into the LHC from the current $1.15 \times 10^{11}$ to $2.3 \times 10^{11}$ $p^+ $ /bunch. [...]
2021 - 14 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 093002 Fulltext: PDF;

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2021-09-19
15:49
FCC-ee: the synthesis of a long history of e+e- circular colliders / Oide, K (KEK, Tsukuba) ; Wenninger, J (CERN)
The design of FCC-ee is relying on the accumulated experience of $\mathrm {e^{+}e^{-}}$ colliders that have been designed, constructed and operated in the past 40 years. FCC-ee will surpass the 26.7 km long Large Electron Positron collider LEP by a factor 4 in size. [...]
2021 - 7 p. - Published in : Eur. Phys. J. Plus 136 (2021) 924 Fulltext: PDF;

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2021-09-19
15:49
Recent top quark measurements with the CMS experiment / De Iorio, A (INFN, Naples ; Naples U.) /CMS Collaboration
Latest results on top quark pair and single top quark production cross sections (inclusive and differential) are presented using proton-proton collision data collected by CMS. The results are used to constrain the standard model parameters. [...]
2021 - 8 p. - Published in : Phys. Scr. 96 (2021) 124022
In : 9th International Conference on New Frontiers in Physics (ICNFP), Online, Greece, 4 - 12 Sep 2020, pp.124022

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2021-09-19
15:49
Study of the scattering of $^{15}$C at energies around the Coulomb barrier / Ovejas, J D (Madrid, Inst. Estructura Materia) ; Knyazev, A (Lund U.) ; Martel, I (Liverpool U. ; Huelva U.) ; Tengblad, O (Madrid, Inst. Estructura Materia) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Cederkall, J (Lund U.) ; Keeley, N (NCBJ, Lodz) ; Rusek, K (Warsaw U., Heavy Ion Lab) ; García-Ramos, C (Huelva U.) ; Pérez, T (Huelva U.) et al.
The neutron rich carbon isotope $^{15}$C is the only known case of an almost "pure" 2s$_{1/2}$ single-neutron halo ground state configuration. At collision energies around the Coulomb barrier the reaction dynamics is expected to be dominated by single neutron transfer and breakup [...]
2020 - 4 p. - Published in : J. Phys. : Conf. Ser. 1643 (2020) 012095 Fulltext: PDF;
In : International Nuclear Physics Conference 2019, Glasgow, United Kingdom, 29 Jul - 2 Aug 2019, pp.012095

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