First results at SPIRAL-GANIL

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:204

Article; Proceedings Paper

Villari, ACC

关键词: radioactive nuclear beams;    ISOL;    cyclotron;    target ion source;   

DOI  :  10.1016/S0168-583X(02)01887-6

来源: Elsevier

【 摘 要 】

The first accelerated exotic beam of the Production System of Radioactive Ion and Acceleration On-Line (SPIRAL) facility at Grand Accelerateur National d'Ions Lourds, Caen has been delivered for the first experiment in the end of September 2001. The Ne-18 (half-live of 1.67 s) isotope has been produced through the projectile fragmentation of a Ne-20 primary beam at 95A MeV on a carbon target, located at the new underground production cave of SPIRAL. For this first experiment, a maximum primary beam intensity of 0.18 pmuA was used, in order to limit the irradiation of the production ensemble. The radioactive atoms released from the carbon target - heated at 1800 degreesC - were ionised by the compact and totally permanent magnet Nanogan-3 electron cyclotron resonance ion source to the charge state 4+. The beam was accelerated by the new compact cyclotron for medium energy ions up to the energy of 7A MeV. The maximum beam intensity of Ne-18 achieved during this first run was of 2 x 10(6) particles per second at the experimental area. The beam was contaminated by 15% of O-18 and a very small amount (<1%) of F-18. The beam was finally purified from the contaminants by a stripping foil placed in the entrance of the LISE spectrometer. (C) 2003 Elsevier Science B.V. All rights reserved.

【 授权许可】

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