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1. Development of a 1+/N+ setup for the production of multicharged radioactive alkali ions in SPIRAL

Author

J. C. Thomas, Mélanie Marie-Jeanne, Antonio Villari, G. Gaubert, C. Barué, R. Alvès Condé, C. Pierret, P. Jardin, F. Pellemoine, J. Cornell, P. Delahaye, M. G. Saint-Laurent, C. Eleon, David Boilley, L. Maunoury, P. Lehérissier, Jean-Yves Pacquet, R. Leroy, B. Jacquot, G. Lhersonneau, M. Dubois, J. A. Alcantara, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Caen Normandie (UNICAEN), Normandie Université (NU), European Organization for Nuclear Research (CERN), SPIRAL, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Grand Accélérateur National d'Ions Lourds ( GANIL ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ), European Organization for Nuclear Research ( CERN ), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Brassy, Chantal

Subjects
010302 applied physics, Radioactive ion beams, Alkali ions, Materials science, Charged-particle beam sources and detectors, Charged-particle beams, Isotope, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Thermal ionization, Alkali metal, 01 natural sciences, Ion source, Ion sources: positive and negative, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 29.38.-c, 07.77.Ka, 29.25.Ni, 41.75.-i, 0103 physical sciences, Online method, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [ PHYS.PHYS.PHYS-ACC-PH ] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Atomic physics, 010306 general physics, Instrumentation, Separator (electricity), Radioactive beams
Abstract

International audience; In the framework of the production of radioactive ion beams by the isotope separator online method, a new system has been developed at GANIL/SPIRAL I to produce multicharged alkali ions. The principle, referred to as the “direct 1+/N+ method,” consists of a surface ionization source associated with a multicharged electron-cyclotron-resonance ion source without an intermediate mass separator. This new system has been tested online using a 48Ca primary beam at 60.3 A MeV. The experimental evidence of the direct 1+/N+ process has been obtained for a potential difference between the two sources of 11 V and with a 1+/N+ charge breeding efficiency of 0.04% for 47K5+. This value is significantly lower than the value of 6% obtained for stable K ions with the standard 1+/N+ method. A possible explanation is given in the text.

Published
2008

2. The radioactive ion beam production systems for the SPIRAL2 project

Author

F. Lemagnen, S. Essabaa, R. Leroy, O. Bajeat, C. Feierstein, C. Lau, P. Jardin, L. Serani, G. Gaubert, A. Pichard, Y. Huguet, C.-E. Demonchy, Jean-Yves Pacquet, C. Eleon, F. Pellemoine, N. Lecesne, F. Launay, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), SPIRAL2, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, 29.27.-a, 29.20.Ej, 29.38.-c, Materials science, Ion beam, Beams in particle accelerators, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Thermal ionization, Ion gun, 01 natural sciences, 7. Clean energy, Ion source, Ion, Nuclear physics, Ion beam deposition, Ion implantation, Physics::Plasma Physics, Ionization, 0103 physical sciences, Linear accelerators, Physics::Accelerator Physics, Atomic physics, 010306 general physics, Nuclear Experiment, Instrumentation, Radioactive beams
Abstract

International audience; The SPIRAL2 project, currently under construction at GANIL, will include an isotope separator on line based facility for the production and acceleration of radioactive ion beams. A superconducting linear accelerator will accelerate 5 mA deuterons up to 40 MeV and 1 mA heavy ions up to 14.5 MeV/u. These primary beams will be used to bombard both thick and thin targets. We are investigating three different techniques to produce the radioactive ion beams: (1) the neutron induced fission of uranium carbide, (2) the direct interaction of deuterons in a uranium carbide target, and (3) the interaction of a heavy ion beam with a target. All these production systems will be coupled to an ion source. Four kinds of ion sources are foreseen for the ionization of the radioactive atoms: an electron cyclotron resonance ion source, a surface ionization ion source, a forced electron beam induced arc discharge ion source, and a laser ion source depending on the characteristics of the desired radioactive ion beam in terms of intensity, efficiency, purity, etc. A presentation of the SPIRAL2 project and of the different production systems is given.

Published
2007

3. Measurement of the Ar diffusion coefficient in graphite at high temperature by the ISOL method

Author

G. Gaubert, Jean-Yves Pacquet, J. Cornell, J. C. Thomas, Bertrand Jacquot, P. Jardin, R. Leroy, L. Maunoury, N. A. Orr, Ulli Köster, C. Huet-Equilbec, Marc Dubois, J. C. Angélique, R. Alvès Condé, M. Turrión, C. Eleon, C. Stodel, D. Boilley, F. Pellemoine, H. Frånberg, M. G. Saint-Laurent, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU), Paul Scherrer Institute (PSI), European Organization for Nuclear Research (CERN), Institut Laue-Langevin (ILL), ILL, Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Instituto de Estructura de la Materia (IEM), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), M. Lion, W. Mittig, O. Navilliat-Cuncic, P. Roussel-Chomaz, A.C.C. Villari, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Nuclear and High Energy Physics, Work (thermodynamics), Chemistry, ISOL, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 01 natural sciences, Release time, Diffusion, 29.25.Rm, 66.30.Jt, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Graphite, Atomic physics, Diffusion (business), 010306 general physics, Instrumentation, Radioactive decay, Ar
Abstract

International audience; This work has been carried out at GANIL within the ambit of the TARGISOL European collaboration which aims to study the relevant variables governing the release of radioactive elements from targets in an ISOL system. This work shows how it has been possible to extract diffusion coefficients for 35Ar atoms diffusing out of graphite targets from release time measurements by using an analytic description of the release times. The diffusion coefficients and efficiencies are presented and compared with results obtained using a “continuous” method.

Published
2007

4. Development of a surface ionization source for the production of radioactive alkali ions in SPIRAL

Author

F. Pellemoine, Mélanie Marie-Jeanne, P. Lehérissier, Bertrand Jacquot, L. Maunoury, P. Delahaye, P. Jardin, G. Lhersonneau, C. Pierret, J. Cornell, Antonio Villari, J. C. Thomas, Marc Dubois, R. Alvès Condé, Jean-Yves Pacquet, M. G. Saint-Laurent, G. Gaubert, C. Eleon, C. Barué, R. Leroy, David Boilley, Juan Antonio Alcantara-Nunez, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Caen Normandie (UNICAEN), Normandie Université (NU), European Organization for Nuclear Research (CERN), Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), M. Lion, W. Mittig, O. Navilliat-Cuncic, P. Roussel-Chomaz, A.C.C. Villari, SPIRAL, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Nuclear and High Energy Physics, Ion beam, Chemistry, Thermal ionization, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Alkali metal, Ion gun, 7. Clean energy, 01 natural sciences, Ion source, Ion, 1+ ion beam, Ion beam deposition, charge breeding, Ionization, 29.25.Rm, 29.25.Ni, 29.38.-c, 0103 physical sciences, target ion source system, Atomic physics, 010306 general physics, Instrumentation, 1+ to N+ method
Abstract

International audience; In the framework of the production of radioactive alkali ion beams by the isotope separator on-line (ISOL) method in SPIRAL, a surface ionization source has been developed at GANIL to produce singly-charged ions of Li, Na and K. This new source has been designed to work in the hostile environment found at SPIRAL whilst having a long lifetime. This new system of production has two ohmic heating components: the first for the target oven and the second for the ionizer. The latter, being in carbon, offers high reliability and competitive ionisation efficiency. This new surface ionization source has been tested on line using a 48Ca primary beam at 60,3A MeV with an intensity of 0,14 pµA. The ionization efficiencies obtained for Li, Na and K are significantly better than the theoretical values calculated using the known Langmuir surface ionisation equation. Moreover, the design of the ion source avoids the cavity effects reported by Kirchner. The enhanced efficiency can be understood by considering a particular effect related to the polarization of the ionizer. This feature is shown to be extremely important also for short-lived isotopes. In the future, this source will be associated with the multicharged electron-cyclotron-resonance (ECR) ion source NANOGAN III for production of multicharged alkali ions in SPIRAL. The preliminary tests of the setup for the production of multicharged alkali ions will also be presented in this contribution.

Published
2007

5. Status report on ECR ion source operation at GANIL

Author

P. Jardin, C. Canet, Jean-Yves Pacquet, C. Barué, M. Dubois, R. Leroy, J. L. Flambard, M. Dupuis, F. Pellemoine-Landré, P. Lehérissier, F. Lemagnen, N. Lecesne, G. Gaubert, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lion, Michel

Subjects
Materials science, Ion beam, Cyclotron, Ion gun, Ion source, law.invention, Nuclear physics, Ion beam deposition, Beamline, law, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation, Ion cyclotron resonance, Beam (structure), Nuclear Physics
Abstract

Two electron cyclotron resonance ion sources, ECR 4 and ECR 4 M, provide high charge state beams to the compact cyclotrons, C01 and C02, which are alternative injectors for the GANIL cyclotrons CSS1 and CSS2. When an injector runs for a long period, the off-line source can be used for beam developments or, together with the off-line injector, deliver a beam to a new beam line, called IRRSUD, for atomic physics experiments. Various ions are requested for beam time for periods of 8 to 11 weeks. Although the majority of the required beams comes from gaseous elements, work on the production of beams of metallic ions is always a main activity. New ovens are being developed to improve the capacity and the performances of the standard micro-oven. The latest results with 238U beam, using sputtering method and 76Ge beam using recycling method, are reported here.

Published
2003

6. Latest results obtained at GANIL with new target-source systems dedicated to radioactive ion production

Author

Olivier Tuske, C. Huet-Equilbec, C. Barué, G. Gaubert, F. Durantel, S. Gibouin, R. Leroy, N. Lecesne, D. Verney, P. Jardin, M. Dupuis, C. Canet, Jean-Yves Pacquet, W. Farabolini, J. L. Flambard, M. G. Saint-Laurent, P. Lehérissier, C. Stodel, F. Lemagnen, A. C. C. Villari, J. Cornell, J. C. Angélique, L. Maunoury, F. Pellemoine, M. Dubois, Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010302 applied physics, Radioactive ion beams, Physics, Nuclear engineering, 01 natural sciences, Ion, 0103 physical sciences, Production (economics), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Atomic physics, 010306 general physics, Instrumentation, Radioactive decay, Production system
Abstract

International audience; Two new target-source systems have been realized and used to produce radioactive elements with primary beams of 78Kr (68.5 A MeV) and 36Ar (95 A MeV). The production yields of 73,72Kr, 35,33,32Ar, 30,29P, 31,30S, 34,33,32Cl and of some other condensable elements such as 73,72Br and 73,71Se are presented. The results of the improvements between the two versions of the production system are discussed.

Published
2003

7. Ion source development at GANIL for radioactive beams and high charge state ions

Author

N. Lecesne, G. Gaubert, J. P. Rataud, R. Leroy, M. Dupuis, Y. Huguet, M. G. Saint-Laurent, L. Maunoury, Antonio Villari, F. Lemagnen, P. Lehérissier, C. Barué, S. Gibouin, P. Jardin, C. Canet, Jean-Yves Pacquet, J. L. Flambard, F. Pellemoine-Landré, Lion, Michel, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Ion beam, Cyclotron, Highly charged ion, Charge (physics), Charged particle, Ion source, Ion, law.invention, Nuclear physics, Ion beam deposition, Physics::Plasma Physics, law, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics::Accelerator Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Atomic physics, Nuclear Experiment, Instrumentation
Abstract

The GANIL laboratory is in charge of the production of ion beams for nuclear and non-nuclear physics. This article reviews the latest developments that are underway in the fields of radioactive ion beam production, increase of the metallic ion intensities, and production of highly charged ion beams.

Published
2002

8. Mono 1000: a simple and efficient 2.45 GHz electron cyclotron resonance ion source using a new magnetic structure concept

Author

M. Dupuis, F. Pellemoine, F. Lemagnen, N. Lecesne, J. P. Rataud, R. Leroy, C. Barué, M. G. Saint Laurent, G. Gaubert, P. Lehérissier, P. Jardin, C. Canet, Jean-Yves Pacquet, J. L. Flambard, A. C. C. Villari, Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lion, Michel

Subjects
Materials science, Ion gun, Fourier transform ion cyclotron resonance, Electron cyclotron resonance, Ion source, Ion, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics::Plasma Physics, Ionization, Physics::Atomic and Molecular Clusters, Molecule, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Atomic physics, Instrumentation, Ion cyclotron resonance
Abstract

The production of singly charged atomic and molecular ions with a new 2.45 GHz electron cyclotron resonance ion source has been studied. The ion source Mono 1000 uses a new magnetic confinement structure. The elements Ne, Ar, and Kr are ionized with efficiencies close to 100%, while 45% has been achieved for He. In the case of the molecules SO2 and SF6, more than 90% overall efficiency has been observed with more than 40% of sulfur atoms leaving the source under the form S+. A total extracted yield of 4×1012 singly charged fulleren (C60) ions per second has also been observed.

Published
2001

9. High intensity metallic ion beams from an ECR ion source at GANIL

Author

Y. Huguet, F. Lemagnen, G. Gaubert, F. Pellemoine-Landré, N. Lecesne, J. P. Rataud, R. Leroy, M. Dupuis, P. Lehérissier, J. L. Flambard, C. Barué, Paul-Alain Jaffrès, S. Gibouin, P. Jardin, C. Canet, and Jean-Yves Pacquet

Subjects
Materials science, Ion beam, Cyclotron, Ion gun, XX, Ion source, law.invention, Ion, Ion beam deposition, law, Atomic physics, Instrumentation, Beam (structure), Germanium oxide
Abstract

In recent years, progress concerning the production of high intensity of metallic ion beams (58Ni, 48Ca, 76Ge) at GANIL have been performed. The metallic ion from volatile compound method has been successfully used to produce a high intensity nickel beam with the ECR4 ion source: 20 e μA of 58Ni11+ at 24 kV extraction voltage. This beam has been maintained for 8 days and accelerated up to 74.5 MeV/u by our cyclotrons with a mean intensity of 0.13 pμA on target. This high intensity, required for experiment, led to the discovery of the doubly magic 48Ni isotope. The oven method has been first tested with natural metallic calcium on the ECR4 ion source, then used to produce a high power beam (740 W on target, i.e., 0.13 pμA accelerated up to 60 meV/u) of 48Ca still keeping a low consumption (0.09 mg/h). A germanium beam is now under development, using the oven method with germanium oxide. The ionization efficiencies have been measured and compared.

Published
2001

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