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The MIVOC system at JYFL consists of a glass tube/sample chamber (piece A in pictures), a rough dosing valve (B), a stainless steel tube (C) and a valve system (D and E). The glass tube with the volatile material is connected through the dosing valve to the 50 cm long, 15 mm ID stainless tube, which conducts the material into the plasma chamber. The gate valve E is used to open a gateway to the main vacuum of the ion source. The additional valves in the connection piece D allows rough pumping of the MIVOC and/or oven system used at JYFL before opening valve E to minimize gas load to the plasma chamber while changing injected materials. The connection piece D also contains a double shaft seal with rough intermediate pumping, which allows sliding in the MIVOC system, while under high vacuum. Note: conductance C [l/s] between the volatile sample and plasma chamber has to be high enough to guarantee sufficient molecule flow into the ECRIS plasma!



MIVOC publications (JYFL):

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.

H. Koivisto, E. Kolehmainen, R. Seppälä, J. Ärje and M. Nurmia, Production of a magnesium ion beam using the MIVOC method, Nucl. Instr. and Meth. in Phys. Res., B117, (1996), p.186.

Biri S., Valek A., Ditrói F., Koivisto H., Arje, Rosengard U., Stiebing, K., Schmidt L, Heavy ion beams from the new Hungarian ECR ion source. Acta Physica Hungarica New Series - Heavy Ion Physics 8, (1998), p.217-225.

H. Koivisto, J. Ärje and M. Nurmia, The MIVOC method for the production of metal ion beams, Rev. Sci. Instrument. 69(2), Feb., (1998), p.785

K.E. Stiebing, S. Biri, J. Ärje, F. Ditrói, H. Koivisto, J Pálinkás, L. Schmidt, A. Valek, Highly charged metal ions by placing a ferrocene container inside the ECR ion source, Physica Scripta T 80 (1999), p.509-510.

H. Koivisto, J. Ärje, R. Seppälä, and M. Nurmia, Production of Titanium Ion Beams at an ECR ion source, Nucl. Instr. and Meth. in Phys. Res., B187, (2002), p. 111.

O. Tarvainen, P. Suominen and H. Koivisto, Reduction of the carbon contamination of an electron cyclotron resonance ion source, Rev. Sci. Instrum., 75 (5), May., (2004), p. 1523.

Rubert, J. Piot, Z. Asfari, B.JP. Gall, J. Ärje, O. Dorvaux, P.T. Greenlees, H. Koivisto, A. Ouadi, R. Seppäla, First intense isotopic titanium-50 beam using MIVOC method, Nucl. Instrum. and Meth. in Phys. Res. B 276 (2012), p. 33.


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