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C. R. Wolf, M. J. Frank, and E. Held, “COLUMBUS - A Small Cyclotron for School and Teaching Purposes”, in Proc. 20th Int. Conf. on Cyclotrons and their Applications (Cyclotrons'13), Vancouver, Canada, Sep. 2013, paper WE1PB03, pp. 296-298. |
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M. J. Frank, E. Held, and C. R. Wolf, “Columbus - A Simple Ion Source”, in Proc. 20th Int. Conf. on Cyclotrons and their Applications (Cyclotrons'13), Vancouver, Canada, Sep. 2013, paper WEPPT021, pp. 364-365. |
