Nickel with Phoenix-V2 at LPSC
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58Ni19+ / Oven LCO HT
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Compound used
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Ni metal natural (68%)
vapor pressure ~ 7.10-3 Torr at 1500°C
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Aspect
Chemical sensitivity
solid, stable
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Ion source parameters
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Phoenix-V2 18GHz
RF power : 1.7 kW
Mixing gaz : O2
Oven power : 71 W (~1600°C off line)
Oven position : 0 mm
Source voltage : 40kV/4.7mA
Intensity : 19 µA (58Ni19+)
For <I19+> =20 µA during 2h :
Consumption : 0.4 mg/h
Total ionization efficiency : 6 %
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- The metal is melt off-line in the oven container
- When introducing the oven into the source, the axial magnetic field must be off to prevent the magnetic nickel from escaping into the plasma.
- The Tantalum orifice located at the mouth of the oven is not used to reduce metal condensation.
More details can be found in this publication : " Metal beam developments for the SPIRAL 2 project ", 15th ICIS (Chiba 2013).
Spectrum optimized on Ni19+ obtained at LPSC with Phoenix-V2, Oven power 71W-18V-19.3A (1500°C off line), Slits FH13 ± 5 mm, RF: 1.68 kW (67W reflected), Source voltage: 40.0kV / 9.1mA (~ 4.7 mA réel), Biased star: - 36 V / 0.5 mA, buffer gaz O2, extraction pressure: 1.4E-8 mbar, BPI-BPM-BPE cons : 1230 A / 1280 A / 1291 A, BPI-BPM-BPE lu : 1125 A / 1181 A / 1294 A, Optics: SOL11 : 140.37 A, D11 : 65.49 A, Q11 : 20.23 A, Q12 : 41.49 A, Q13 : 54.29 A.