Iron at JYFL

14 GHz ECRIS, MIVOC method

Record Fe ion beams, shown in the table, were produced with the JYFL 14 GHz ECRIS using MIVOC method with commercially available ^natFe(C₅H₅)₂ (Ferrocene). Ion source was optimised for Fe¹¹⁺. Material Safety Data Sheets for safe use of Ferrocene can be found from here .

Mixing gas: No 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: 350 W

Acceleration voltage: 10 kV (JYFL extraction system)

Material consumption: The 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.

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.