Review of Scientific Instruments · 2006 · 12 citations · 1 references
Natural SciencesNuclear EngineeringPhysicsElectromagnetismNuclear InstrumentationPlasma PhysicsAccelerator PhysicsSuperconducting Magnet SystemsBeam TransportElectron Cyclotron Resonance Plasma SourcesIon Source DesignIon Source OptimizationIon Source PhysicsMagnetic Coil DesignParticle Beam TransportTuning
A “liquid He-free” superconducting electron cyclotron resonance ion Source DECRIS-SC, to be used as an injector for the compact IC-100 cyclotron, has been designed and built in cooperation between the FLNR and LHE (JINR). The main feature is that a compact refrigerator of the Gifford-McMahon type is used to cool the solenoid coils. Due to a very small cooling power at 4.2K (about 1W) our efforts were aimed at optimizing the magnetic structure and minimizing external heating of the coils. The maximum magnetic-field strengths are 3 and 2T in the injection and extraction regions, respectively. When the source had been assembled and magnetic field measured, the ion source was immediately installed at the injection line of the cyclotron. During the first tests, which were run only a few days, some problems arose due to a relatively poor efficiency of the beam transport and analyzing line. From the moment of the first reliable beam production up to now the ion source has been operating continuously for the cyclotron tuning and then for the experiment. Some results of the one-year operation are reported.
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