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Publications (4)3.6 Total impact

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    ABSTRACT: KATRIN is the most advanced beta-decay experiment for measuring the rest mass of the neutrino. Within this experiment, the Windowless Gaseous Tritium Source (WGTS) is a sophisticated cryogenic and magnetic system of 16 meter length incorporating in total 21 superconducting solenoid coils and additionally four dipoles surrounding an accurately temperature-stabilized beam tube. The size and complexity of the system requests thorough design both for the magnetic and cryogenic aspects. The design of the system is near completion and the fabrication has started.
    IEEE Transactions on Applied Superconductivity 07/2008; · 1.20 Impact Factor
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    ABSTRACT: Two superconducting cyclotrons have been delivered by ACCEL to produce 250 MeV protons for cancer treatment. Based on a conceptual design of the national superconducting cyclotron laboratory (NSCL) these machines are the first ones of their kind being engineered and built by industry. Application of superconductivity provides better and more reliable beam performance as compared to normal conducting cyclotrons. We present the assessment for applying superconductivity, review the design and assembly, and report on the first year of operation experience with regard to cryogenic and magnetic performance.
    IEEE Transactions on Applied Superconductivity 07/2007; · 1.20 Impact Factor
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    ABSTRACT: A large superconducting cryogen-free magnet has been designed, manufactured and tested. The magnet reached 4.1 T in the 430 mm room temperature bore with a ramp time of 35 min. The magnet is cooled by a two-stage GM cryocooler. The magnet can be rotated on a support frame to be operated with either horizontal or vertical bore. The stored energy of 1 MJ can safely be handled during a quench. Homogeneity, cool down as well as quench properties confirmed the design values. The magnet is now being operated by the end user.
    IEEE Transactions on Applied Superconductivity 07/2003; · 1.20 Impact Factor
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    ABSTRACT: Within the contract of the supply of a turn key proton/deuteron LINAC for SOREQ, a superconducting half wave resonator RF module was designed for the acceleration of protons/deuterons from about 1.5 MeV/u to about 6.5 MeV. The module consists out of 6 superconducting half wave resonators designed for optimum acceleration of protons/deuterons with velocity 0.09 c, 3 superconducting solenoids for focussing, cavity tuners and couplers, thermal shield, magnetic shielding, vacuum vessel, helium vessels, helium supply/return and all instrumentation. Main design considerations of the cavities, solenoids, tuners and couplers as well as for the module especially in view of assembly and alignment will be explained. A major design challenge was the need from beam dynamics to minimize the longitudinal distance between the cavities. Prototype tests of cavity, helium vessel, tuner and coupler all at cryogenic temperatures are foreseen before the main production is launched. A cavity preparation and cold RF test facility for cavities and completed modules is under construction at ACCEL to allow first cold RF tests at the beginning of next year.