Production and trapping of radioactive atoms at the TRI\muP facility

Abstract

The structures for the TRI$\mu$P facility have been completed and commissioned. At the facility radioactive nuclides are produced to study fundamental interactions and symmetries. An important feature is the possibility to trap radioactive atoms in order to obtain and hold a pure substrate-free sample for precision measurements. In the TRI$\mu$P facility a production target is followed by a magnetic separator, where radioactive isotopes are produced in inverse reaction kinematics. Separation up to 99.95% could be achieved for ${}^{21}$Na. A novel transmitting thermal ionizing device was developed to stop the energetic isotopes. Some 50% of stopped ${}^{21}$Na could be extracted and transported as low energy singly charged ions into a radio frequency quadrupole cooler and buncher with 35% transmission efficiency. The ions are transported lossless via a drift tube and a low energy electrostatic beam line into the experimental setup. Such ions can be neutralized on hot metal foils and the resulting atoms can be stored in a magneto-optical trap. The functioning of that principle was demonstrated with stable Na extracted from the thermal ionizer, radioactive beams will follow next.

arXiv comment11 pages, 5 figures, XVth International Conference on Electromagnetic Isotope Separators and Techniques Related to their Applications (EMIS 2007)

References in corpus (7)

• Tests of the standard electroweak model in beta decay
• Calculations of parity nonconserving s-d transitions in Cs, Fr, Ba II, and Ra II
• Dual Magnetic Separator for TRI$\mu$P
• Production of Radioactive Nuclides in Inverse Reaction Kinematics
• Fundamental Symmetries and Interactions
• Development of a thermal ionizer as ion catcher
• TRI$\mu$P - A New Facility to Investigate Fundamental Interactions with Optically Trapped Radioactive Atoms

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• Strongly enhanced atomic parity violation due to close levels of opposite parity
• Development of a thermal ionizer as ion catcher
• Electric dipole transition amplitudes for atoms and ions with one valence electron
• Experimental study of vapor-cell magneto-optical traps for efficient trapping of radioactive atoms
• Measurements of the sticking time and sticking probability of Rb atoms on a polydimethylsiloxane coating
• Stacked-Ring Ion Guide for Cooling and Bunching Rare Isotopes