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Collimated beam formation in 3D acoustic sonic crystals
/ Vanel, A L (CERN) ; Dubois, M (Fresnel Inst., Marseille ; CNES, Toulouse) ; Tronche, C (IRAP, Toulouse) ; Fu, S (Tsinghua U., Beijing) ; Wang, Y-T (Imperial Coll., London ; City Coll., N.Y. ; Taiwan, Natl. Normal U.) ; Dupont, G (Fresnel Inst., Marseille ; CNES, Toulouse) ; Rakíc, A D (Queensland U.) ; Bertling, K (Queensland U.) ; Abdeddaim, R (Fresnel Inst., Marseille ; CNES, Toulouse) ; Enoch, S (Fresnel Inst., Marseille ; CNES, Toulouse) et al.
We demonstrate strongly collimated beam formation, at audible frequencies, in a three-dimensional acoustic phononic crystal where the wavelength is commensurate with the crystal elements; the crystal is a seemingly simple rectangular cuboid constructed from closely-spaced spheres, and yet demonstrates rich wave phenomena acting as a canonical three-dimensional metamaterial. We employ theory, numerical simulation and experiments to design and interpret this collimated beam phenomenon and use a crystal consisting of a finite rectangular cuboid array of polymer spheres 1.38 cm in diameter in air, arranged in a primitive cubic cell with the centre-to-centre spacing of the spheres, i.e. [...]
2024 - 12 p.
- Published in : New J. Phys. 26 (2024) 073021
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New exotic beams from the SPIRAL 1 upgrade
/ Delahaye, P. (GANIL) ; Dubois, M. (GANIL) ; Maunoury, L. (GANIL) ; Annaluru, A. (GANIL) ; Angot, J. (LPSC, Grenoble) ; Bajeat, O. (GANIL) ; Blank, B. (CENBG, Gradignan) ; Cam, J.C. (Caen U.) ; Chauveau, P. (GANIL ; CSNSM, Orsay) ; Frigot, R. (GANIL) et al.
Since 2001, the SPIRAL 1 facility has been one of the pioneering facilities in ISOL techniques for reaccelerating radioactive ion beams: the fragmentation of the heavy ion beams of GANIL on graphite targets and subsequent ionization in the Nanogan ECR ion source has permitted to deliver beams of gaseous elements (He, N, O, F, Ne, Ar, Kr) to numerous experiments. Thanks to the CIME cyclotron, energies up to 20 AMeV could be obtained. [...]
arXiv:1903.02220.-
2020-01-15 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 463 (2020) 339-344
Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
In : 18th International Conference on Electromagnetic Isotope Separators and Related Topics, Geneva, Switzerland, 16 - 21 Sep 2018, pp.339-344
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A new FEBIAD-type ion source for the upgrade of SPIRAL1 at GANIL
/ Chauveau, P (GANIL) ; Delahaye, P (GANIL) ; Babo, M (GANIL) ; Bouzomita, H (GANIL) ; Bajeat, O (GANIL) ; Dubois, M (GANIL) ; Frigot, R (GANIL) ; Grinyer, G F (GANIL) ; Grinyer, J (GANIL) ; Jardin, P (GANIL) et al.
The SPIRAL facility at GANIL is being upgraded with a new FEBIAD ion source in order to extend its production capabilities to condensable elements. The coupling of such an ion source with the present GANIL target was recently tested online at SPIRAL at nominal power (1200 W). [...]
2016 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 376 (2016) 35-38
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High-precision half-life measurements of the T=1/2 mirror β decays F17 and Cl33
/ Grinyer, J (GANIL) ; Grinyer, G F (GANIL) ; Babo, M (GANIL) ; Bouzomita, H (GANIL) ; Chauveau, P (GANIL) ; Delahaye, P (GANIL) ; Dubois, M (GANIL) ; Frigot, R (GANIL) ; Jardin, P (GANIL) ; Leboucher, C (GANIL) et al.
Background: Measurements of the ft values for T=1/2 mirror β+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties in the ft values are dominated by the uncertainties in the half-lives. [...]
2015 - 7 p.
- Published in : Phys. Rev. C 92 (2015) 045503
APS Open Access article: PDF;
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6.
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High-precision half-life measurement for the isospin T=1/2 mirror β+ decay of $^{21}$Na
/ Grinyer, J (GANIL) ; Grinyer, G F (GANIL) ; Babo, M (GANIL) ; Bouzomita, H (GANIL) ; Chauveau, P (GANIL) ; Delahaye, P (GANIL) ; Dubois, M (GANIL) ; Frigot, R (GANIL) ; Jardin, P (GANIL) ; Leboucher, C (GANIL) et al.
The half-life of the isospin T=1/2 mirror β+ decay of Na21 was measured at the GANIL-SPIRAL radioactive ion beam facility to be T1/2=22.422 (10) s, a result that is more than a factor of 5 times more precise than the previous world average, with a resulting ft value that is now two times more precise. The precision of this new result implies that the half-life is no longer the dominant source of uncertainty in the Ft value used in the calculation of Vud from mirror decays to test the conserved vector current hypothesis of the standard model. [...]
2015 - 6 p.
- Published in : Phys. Rev. C 91 (2015) 032501
APS Open Access article: PDF;
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Collide@CERN ProHelvetia Public Lecture
/ Calo, Julian (speaker) (CERN) ; Heuer, Rolf (speaker) (CERN) ; Mr. de Diesbach, Simon (speaker) (Collide@CERN) ; Mr. Dubois, Marc (speaker) (Collide@CERN) ; Ms. Perrenoud, Laura (speaker) (Collide@CERN) ; Mr. Vust, Michel (speaker) (ProHelvetia) ; Mrs. Bello, Monica (speaker) (cern)
You are very warmly invited to the opening presentation of Fragment.In’s residency at CERN. Fragment.In are the winners of Collide@CERN ProHelvetia, a collective formed by Laura Perrenoud, Simon de Diesbach, and Marc Dubois [...]
2015 - 5232.
Special Lecture Series
External link: Event details
In : Collide@CERN ProHelvetia Public Lecture
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9.
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GISELE: A resonant ionization laser ion source for the production of radioactive ions at GANIL
/ Lecesne, N (GANIL) ; Saint-Laurent, M G (GANIL) ; Wendt, K (Mainz U.) ; Mattolat, C (Mainz U.) ; Rothe, S (CERN) ; Pichard, A (GANIL) ; Pacquet, J Y (GANIL) ; Dubois, M (GANIL) ; Coterreau, E (Orsay, IPN) ; Franberg, H (GANIL) et al.
SPIRAL2 is the new project under construction at GANIL to produce radioactive ion beams and in particular neutron rich ion beams. For the past 10 yr SPIRAL1 at GANIL has been delivering accelerated radioactive ion beams of gases. [...]
2010
- Published in : Rev. Sci. Instrum. 81 (2010) 02A910
In : International Conference on Ion Sources, Gatlinburg, TN, USA, 20 - 25 Sep 2009, pp.02A910
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10.
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Test of high density UC targets development at Gatchina for neutron rich radioactive beam facilities
/ Lhersonneau, G ( INFN, Legnaro) ; Alyakrinskiy, O (INFN, Legnaro) ; Lanchais, A (INFN, Legnaro) ; Rizzi, V (INFN, Legnaro) ; Tecchio, L.B (INFN, Legnaro) ; Bajeat, O (Orsay, IPN) ; Essabaa, S (Orsay, IPN) ; Lau, C (Orsay, IPN) ; Cheikh Mhamed, M (Orsay, IPN) ; Roussière, B (Orsay, IPN) et al.
Production of on-line mass separator neutron rich isotopes using fission induced by 1 GeV protons on high density uranium carbide has been investigate and results compared with the low density targets yields..
EURISOL-04-21-2009-0044.-
2008
- Published in : Nucl. Instrum. Methods Phys. Res., B 266 (2008) 4326-4329
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