Abstract
Decay losses, associated with the times required for particles to diffuse from ISOL production targets and to effusively-flow to an ion source, must be reduced to as low as practically achievable levels in order to deliver useful beam intensities of short-lived isotopes for research at ISOL based Radioactive Ion Beam (RIB) facilities. We have developed a fast-valve system and complementary 3-D Monte-Carlo code which can be used separately or in combination to assess the effusive-flow properties of vapor-transport systems, independent of size, geometry and chemical properties of the transport species. In this report, we describe the fast valve and present time spectra and characteristic time data for noble gases flowing through serial- and parallel-coupled vapor-transport systems similar in geometry but longer than those used for RIB generation at the HRIBF with and without target coating matrices.
| Original language | English |
|---|---|
| Pages (from-to) | 1187-1192 |
| Number of pages | 6 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms |
| Volume | 267 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 15 2009 |
Funding
The authors are indebted to students and staff members of the Advanced Concept Research and Development Group, who through their diligent efforts, contributed to the content of this paper through execution of effusive-flow measurements used to validate the fast-valve system described in this report. This work was supported by the US Department of Energy under contract DE-AC05-00OR22725 with UT Battelle.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | DE-AC05-00OR22725 |
| UT-Battelle |
Keywords
- Effusive flow
- ISOL target
- Molecular flow
- Monte-Carlo simulation
- Radioactive Ion Beam
- Vapor-transport system