Publications: Conference

Author(s) :M.Barbui, J.Bermudez, O.Alyakrinskiy, L.Tecchio.

Abstract of the poster to be presented at the EURONS Town meeting

Author(s) :V. N. Panteleev, O. Alyakrinskiy, M. Barbui, A. E. Barzakh, D. V. Fedorov, V. S. Ivanov, G. Lhersonneau, K. A. Mezilev, P. L. Molkanov, F. V. Moroz, S. Yu. Orlov, L. Stroe, L. B. Tecchio, M. Tonezzer, Yu. M. Volkov.

A UC target material of 12 g/cm3 density with the grain size of 20 and 5 μm manufactured in a form of pills by the method of powder metallurgy has been tested on-line within the temperature range of (1800-2000) °C. Abstract to ENAM2008

Author(s) :C.Lau, M. Cheikh-Mhamed, S. Essabaa

To take up the most challenging issue of supplying plasma ion source able to produce radioactive beams under extreme SPIRAL-2 and EURISOL irradiation conditions, an R&D program has been initiated to work out IRENA (Ionization by Radial Electrons Neat Adaptation) ion source. Using EBGP (Electron Beam Generated Plasma) concept, the ion source is specifically adapted for thick target and intense irradiation. A validation prototype has been designed, constructed and tested. Results obtained will be presented and commented and IRENA potential discussed, particularly in the framework of the multi-megawatts EURISOL.

Author(s) :G. Lhersonneau et al.,

EMIS abstract

Author(s) :V.N. Panteleev (1), O. Alyakrinskiy (2), M. Barbui (2), A.E. Barzakh (1), M. Dubois (3), C. Eleon (3), S. Essabaa (4), D.V. Fedorov (1), G. Gaubert (3), A.M. Ionan (1), V.S. Ivanov (1), P. Jardin (3), C. Lau (4), R. Leroy (3), G. Lhersonneau (3), K.A. Mezilev (1), C. Mhamed (4), P.L. Molkanov (1), F.V. Moroz (1), S.Yu. Orlov (1), M.G. Saint Laurent (3), L. Stroe (2), L.B. Tecchio (2), M. Tonezzer (2), A.C.C. Villari (3), Yu.M. Volkov (1)

EMIS conference (revised version)

Author(s) :V.N. Panteleev (1), O. Alyakrinskiy (2), M. Barbui (2), A.E. Barzakh (1), M. Dubois (3), C. Eleon (3), S. Essabaa (4), D.V. Fedorov (1), G. Gaubert (3), A.M. Ionan (1), V.S. Ivanov (1), P. Jardin (3), C. Lau (4), R. Leroy (3), G. Lhersonneau (3), K.A. Mezilev (1), C. Mhamed (4), P.L. Molkanov (1), F.V. Moroz (1), S.Yu. Orlov (1), M.G. Saint Laurent (3), L. Stroe (2), L.B. Tecchio (2), M. Tonezzer (2), A.C.C. Villari (3), Yu.M. Volkov (1)

EMIS conference (revised version)

Author(s) :V.N. Panteleev et al.

The ionization efficiency is one of the most important parameters of an on-line used target-ion source system exploited for production of exotic radioactive beams. The ionization efficiency value determination as a characteristic of a target-ion source unit in the stage of its normalizing before on-line use is a very important step in the course of the preparation for an on-line experiment. At the IRIS facility (Petersburg Nuclear Physics Institute, Gatchina) a reliable and rather precise method of the target-ion source unit ionization efficiency measurement by the method of stable beam implantation has been developed. The method worked out exploits an off-line mass-separator for the implantation of the ion beams of selected stable isotopes of different elements into a tantalum foil placed inside the Faraday cup in the focal plane of the mass-separator. The amount of implanted ions has been measured with a high accuracy by the current integrator connected to the Faraday cup. After the implantation of needed amount of the investigated specie, tantalum foil has been implemented into the volume of the target-ion source unit prepared for the on-line utilization at the IRIS on-line separator. For the foil implementation the unit is equipped by a window, which is being closed by a plug after the inserting the tantalum foil with the defined amount of atoms of the measured specimen into the target volume. The first tests with the method used have supplied the ionization efficiency values (9020) % for Rb and (8520) % for Cs in the empty combined target-ion source unit, which was used as a reference one. For the combined target-ion source unit with UC target material inside prepared for on-line experiment the measured value of the ionization efficiency was (52 20) %, that likely can be explained by the carbonization of the inner surface of the target container that brings to the decrease of its work function.

Author(s) :V.N. Panteleev et al.

The capacity of uranium carbide target materials of different structure and density for production of neutron-rich and heavy neutron-deficient isotopes have been investigated at the IRIS facility (PNPI) in the collaboration with Legnaro – GANIL – Orsay laboratories. The yields and release times of the species produced in the targets by the reactions induced by a 1 GeV proton beam of the PNPI synchrocyclotron have been measured. For the purpose to elaborate the most efficient and fast uranium carbide target prototype three kinds of the target materials were studied: a) a high density UC target material having ceramic-like structure with the density of 11 g/cm3 and the grain dimensions of about 200 microns; b) a high density UC target material with the density of 12 g/cm3 and the grain dimensions of about 20 microns prepared by the method of the powder metallurgy; c) a low density UCx target material with the density 3g/cm3 and the grain dimensions of about 20 microns prepared by the ISOLDE method. The comparison of the yields and release efficiencies of Rb, Cs, Fr, In and other species produced from the investigated target materials obtained during on-line tests have been shown. The results of the on-line tests of a high density target material maintenance in the rhenium container have been presented as well. In the fig. 1 the Cs isotope yields produced from a high density UC used at the IRIS facility and UCx prepared by ISOLDE method at IRIS in the collaboration with PARRNe group from Orsay are presented. Some yield points from the ISOLDE original target have been shown as well.

Author(s) :C. LAU et al.

Contribution to Ion Source Developments for SPIRAL-2 and EURISOL