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Production of highly charged ions with an ECRIS using high temperature super-conducting coils

Abstract : Highly charged ions are widely used in atomic physics, nuclear physics and material science. One requirement to produce highly charged ions for an ECRIS [1] and [2] is a high resonance frequency, hence a high resonance magnetic field. With electromagnets, we can produce limited magnetic fields, generally, in the range of 2 T. Also, electromagnets require a significant amount of electrical power, powerful DC power supplies and large cooling systems. As a consequence, producing highly charged ions with a source setup, at ground, is rather difficult and becomes a serious technical and financial challenge if the source is on a high voltage terminal. The use of low temperature superconducting coils ‘LTC' has a real advantage when it comes to electrical power. A reduction factor of 10–20 in the total AC power is obtained. However, the handling of cryogenic liquids generates difficulties and extra costs. An elegant solution consists in using high temperature superconducting wire ‘HTS' [3] and [4]. Indeed, the superconductivity of the HTS wire starts at 77 K. Cryogenic generators with sufficient cooling power at 20 K are commercially available and need only few kW of AC power. In addition to that, the coils are very compact and easy to handle. The following paper presents PKDELIS [ECR HTS source using superconducting coils, French Patent No. FR98 06579]. The first ECRIS in the world using HTS wires, jointly designed and constructed by PANTECHNIK and NSC New Delhi, India.
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Submitted on : Friday, May 12, 2006 - 9:36:44 AM
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C. Bieth, S. Kantas, P. Sortais, D. Kanjilal, G. Rodrigues, et al.. Production of highly charged ions with an ECRIS using high temperature super-conducting coils. 12th International Conference on the Physics of Highly Charged Ions (HCI 2004), Sep 2004, Vilnius, Lithuania. pp.498-503, ⟨10.1016/j.nimb.2005.03.232⟩. ⟨in2p3-00068443⟩



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