Cooling and trapping of radioactive atoms: the Legnaro francium magneto-optical trap

Year: 2003

Authors: Atutov S.N., Calabrese R., Guidi V., Mai B., Scansani E., Stancari G., Tomassetti L., Corradi L., Dainelli A., Biancalana V., Burchianti A., Marinelli C., Mariotti E., Moi L., Veronesi S.

Autors Affiliation: Dipartimento Fisica dell’Università, Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, Via del Paradiso 12,44100 Ferrara, Italy
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Via Romea 4, 35020 Legnaro (PD), Italy
Dipartimento Fisica dell’Università, Istituto Nazionale per la Fisica della Materia, Unita` di Ricerca Siena,Via Banchi di Sotto 55/57, 53100 Siena, Italy

Abstract: A magneto-optical trap for francium radioactive atoms has been set up at the Istituto Nazionale di Fisica Nucleare, Legnaro laboratories, and its characterization and optimization are under way. The main features of the Fr+ beam line, of the target, and of the magneto-optical trap are described in detail. Measurements of the Fr-ion production rate as a function of the target temperature, the primary beam intensity, and energy have been made. Preliminary tests with other stable alkali atoms aimed at an improvement of the magneto-optical trap collection efficiency are reported. Fast and efficient trap loading of rubidium has been obtained through the light-induced atomic desorption from an organic coating. A larger number of sodium atoms, as compared with a monochromatic trapping laser, has been trapped by use of a broadband laser.

Journal/Review: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

Volume: 20      Pages from: 953  to: 959

KeyWords: Cooling; Desorption; Ion beams; Ionization; Lasers; Magnetooptical devices; Optimization; Organic coatings; Rubidium, Magnetooptical traps; Radioactivity
DOI: 10.1364/JOSAB.20.000953

Citations: 12
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