期刊
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷 266, 期 21, 页码 4794-4807出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2008.07.022
关键词
Ion guide; Multipole ion beam guide; Radioactive ion beams
类别
资金
- EU 6th Framework program integrating Infrastructure Initiative-Transnational Access [506065]
- Academy of Finland
The laser ion source project at the IGISOL facility, jyvaskyla, has motivated the development and construction of an rf sextupole ion beam guide (SPIG) to replace the original skimmer electrode. The SPIG has been tested both off-line and on-line in proton-induced fission, light-ion and heavy-ion induced fusion-evaporation reactions and, in each case, has been directly compared to the skimmer system. For both fission and light-ion induced fusion, the SPIG has improved the mass-separated ion yields by a factor of typically 4-8. Correspondingiy, the transmission efficiency of both systems has been studied in simulations with and without space charge effects. The transport capacity of the SPIG has been experimentally determined to be similar to 10(12) ions s(-1) before space charge effects start to take effect. A direct comparison with the simulation has been made using data obtained via light-ion fusion evaporation. Both experiment and simulation show an encouraging agreement as a function of current extracted from the ion guide. (C) 2008 Elsevier B.V. All rights reserved.
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