14 GHz ECRIS, MIVOC method
Calcium Record Fe ion beams, shown in the table, were produced on with the JYFL 14 GHz ECRIS using miniature oven with commercially available calciumMIVOC method with commercially available natFe(C5H5)2 (Ferrocene). Ion source was tuned for cyclotron operation to meet the intensity requirementoptimised for Fe11+. Material Safety Data Sheets for safe use of Ferrocene can be found from here .
Mixing gas: HeNo mixing gas was used in this run. Typically oxygen is used to maximise the intensities and to minimise the material consumption and carbon contamination.
Microwave power: 300-500 350 W
Acceleration voltage: 10 kV (JYFL extraction system)
Material consumption: N/AThe material consumption was not measured in the experiment resulting in record intensities. Couple of months later the consumption rate of 1 mg/h for the enriched 54Fe was measured. In this experiment the intensity of 52 µA (54Fe11+) was extracted from the JYFL 14 GHz ECRIS. The intensity was not maximised. The main goal was to meet the intensity requirement, with minimum material consumption, and to produce a stable beam. The enriched MIVOC compound (54Fe(C5H5)2) was synthesised at JYFL for the experiment.
| 11+ | 115 |
|---|---|
| 12+ | 101 |
| 13+ | 58 |
| 14+ | - |
| 15+ | 31.2 |
| 16+ | - |
| 17+ | 3.2 |
An iron spectrum produced by MIVOC can be found from here.
For more information see:
H. Koivisto, et.al., Nucl. Instr. and Meth. in Phys. Res., B174, (2001), p. 379
H. Koivisto, J. Ärje and M. Nurmia, Metal ion beams from an ECR ion source using volatile compounds, Nucl. Instr. and Meth. in Phys. Res., B94, (1994), p.291.