A HTS scanning magnet and AC operation

Authors :: Hatanaka, K.
Nakagawa, J.
Fukuda, M.
Yorita, T.
Saito, T.
Sakemi, Y.
Kawaguchi, T.
Noda, K.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Apr2010, Vol. 616 Issue 1, p16-20. 5p.
Publication Year :: 2010
Abstract: Abstract: A scanning magnet using high-temperature superconductor (HTS) wire was designed, built, and tested for its suitability as a beam scanner. After successful cooling tests, the magnet performance was studied using DC and AC currents. With DC current the magnet was successfully operated to generate designed field distributions and effective length. In AC mode, the magnet was operated at frequencies of 30–59Hz and a temperature of 77K as well as 10–20Hz and 20K. The power losses dissipated in the coils were measured and compared with the model calculations. The observed losses per cycle were independent of the frequency and the scaling law of the transport current was consistent with theoretical predictions for hysteretic losses in HTS wires. [Copyright &y& Elsevier]