Ion source: JYFL 14 GHz ECRIS
Method: JYFL resistive miniature oven (operated at around 600 degrees C)
Materials: Isotopically enriched 76Ge (fine metallic powder, color black/dark gray) in a tungsten (W) crucible.
Mixing gas: O2 (He was also tried, but it provided very poor performance)
Microwave power: 190 W
Extraction voltage: 10 kV
Material consumption: 0.28 mg/h (averaged over the 1 week run)
| CS | I (uA) |
|---|---|
| 9+ | 12.5 |
| 10+ | 19.3 |
| 11+ | 27.4 |
| 12+ | 31.9 |
| 13+ | 34.1 |
| 14+ | 30.9* |
| 15+ | 20.2 |
| 16+ | 12.3 |
| 17+ | 6.6 |
| 18+ | 2.5 |
*= Partial overlap with 16O3+.
Note: Carbon contamination in the charge state distribution above is from the previous run.