| Autor: |
John P. Greene, Guy Savard, S. Gulick, J. K. P. Lee, G. D. Sprouse, D. Seweryniak, J. A. Clark, C. Boudreau, F. Buchinger, J. Vaz, A. M. Heinz, A. F. Levand, C. Scheidenberger, G. Münzenberg, J. C. Wang, Hans Geissel, K. S. Sharma, J. E. Crawford, Bruce J. Zabransky, M. Maier, Z. Zhou |
| Rok vydání: |
2003 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 204:582-586 |
| ISSN: |
0168-583X |
| Popis: |
A new approach to the production of low energy radioactive beams involves the stopping of fast beams produced by fragmentation, in-flight fission or fusion–evaporation reaction into a large gas catcher where the reaction products are thermalized in high-purity helium and extracted as singly charged ions for post-acceleration. This removes the limitation present in standard ISOL technique for species that are difficult to extract from the target/ion source assembly. This approach has been implemented at Argonne since 1998 to inject fusion–evaporation products in an ion trap system. Via a series of improvements since then, we now reach efficiencies for these devices of close to 50% with delay times below 10 ms. In preparation for the RIA project, a larger device for stopping fragmentation products is in preparation. The basic principles behind these devices together with results obtained and experience gained operating these devices will be presented. Preparation for a test of the large gas cell at the full RIA energy at GSI will also be presented. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect