Multiple Ionization of Metal Ions in SMIS 75

A.V.Vodopyanov<SUP>1</SUP>; S.V.Golubev<SUP>1</SUP>; V.I.Khizhnyak<SUP>1</SUP>; D.A.Mansfeld<SUP>1</SUP>; <BR>A.G.Nikolaev<SUP>2</SUP>; E.M.Oks<SUP>2</SUP>; G.Yu.Yushkov<SUP>2</SUP>

Chinese Physics C> 2007, Vol. 31> Issue(S1) : 159-161

Multiple Ionization of Metal Ions in SMIS 75

Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia2 High Current Electronics Institute, Russian Academy of Sciences, Tomsk, Russia

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Abstract：
A Simple Mirror Ion Source with 75GHz pumping (SMIS 75) has been created. The confinement system is a mirror trap with magnetic field in the plug up to 5T, variable length 15—20cm and mirror ratio 3—5. The plasma of metal ions is injected into the trap by a special vacuum arc minigun. Plasma heating is performed by the microwave radiation of a gyrotron (the frequency of 75GHz, power up to 200kW, pulse duration up to 150μs). The results of the experiment have demonstrated substantial multiple ionization of metal ions. For a metal with high melting temperature (Pt), heating shifts the average ion charge from Pt²⁺ up to Pt⁷⁺. Maximum stripped observed ion is Pt¹⁰⁺. Total current of ion beam is about 300mA.

References

[1]

. Vodopyanov A V, Golubev S V, Razin S V et al. Multiple ionization of metal ions by ECR heating of electrons in vacuum arc plasmas // Review of Scienti c Instruments,2004, 75: 18882. Vodopyanov A V, Golubev S V, Mansfeld D A et al. Multiple ionization of metal ions by ECR heating of electrons in vacuum arc plasmas // Proceedings of 16th International Workshop on ECR Ion Sources, 2004. Berkley, USA p. 1163. Vodopyanov A V, Golubev S V, Mansfeld D A et al. Generation of multicharge ions of refractory metals in ECR discharge in a simple mirror trap. // Zh. Tekhn. Fiz., 2005,75(issue 9): 1014. Anders A, Yushkov G Yu. Ion flux from vacuum arc cathode spots in the absence and presence of a magnetic field// Journal of Applied Physics, 2002, 91(8): 4824-48325. Lotz W. Zeit. fur Phys., 1968, 216: 241

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A.V.Vodopyanov¹, S.V.Golubev¹, V.I.Khizhnyak¹, D.A.Mansfeld¹,
A.G.Nikolaev², E.M.Oks² and G.Yu.Yushkov². Multiple Ionization of Metal Ions in SMIS 75[J]. Chinese Physics C, 2007, 31(S1): 159-161.

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Received: 2007-05-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Multiple Ionization of Metal Ions in SMIS 75

Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia2 High Current Electronics Institute, Russian Academy of Sciences, Tomsk, Russia

Received Date: 2007-05-30
Accepted Date: 1900-01-01
Available Online: 2007-01-03

Abstract: A Simple Mirror Ion Source with 75GHz pumping (SMIS 75) has been created. The confinement system is a mirror trap with magnetic field in the plug up to 5T, variable length 15—20cm and mirror ratio 3—5. The plasma of metal ions is injected into the trap by a special vacuum arc minigun. Plasma heating is performed by the microwave radiation of a gyrotron (the frequency of 75GHz, power up to 200kW, pulse duration up to 150μs). The results of the experiment have demonstrated substantial multiple ionization of metal ions. For a metal with high melting temperature (Pt), heating shifts the average ion charge from Pt²⁺ up to Pt⁷⁺. Maximum stripped observed ion is Pt¹⁰⁺. Total current of ion beam is about 300mA.