Effect of Metal Ring Setting Outside HTSC Bulk Disk on Trapped Field and Temperature Rise in Pulse Field Magnetizing.

In order to enhance the trapped field in cryo-cooled HTSC bulks using pulse field magnetizing (PFM), a metal ring (stainless steel 304 and/or Al) has been tightly set onto the Sm-BaCuO bulk disk and the relation between the total trapped flux ΦTP the trapped field BTP, and the temperature rise ΔT, has been investigated as a function of the applied pulse field Bex. The ΦTP and BTP values are enhanced about 10∼ 20% by the metal ring due to the reduction in the temperature rise ΔT. These results Suggest that a part of the generated heat Q due to the flux motion in the peripheral region promptly transfers to the metal ring and the heat transfer to the cold stage is improved by the ring setting. [ABSTRACT FROM AUTHOR]