Principle of calorimetric measurement.
The schematic arrangement showing the experimental setup.
Schematic diagram showing the test rig rotated up to a speed of 2100 rpm (35 Hz) and generate magnetic field of 0.35 T at the magnet center.
The inner vessel cold finger with the sample holder mounted along with the diagnostic wiring.
Temperature profile during sample holder calibration with a heater mounted on the sample holder.
The calibration curve between the temperature rise and fixed heat load applied to sample holder only (without samples) at 80 K.
Sample holder temperature profile when exposed to a peak field of 0.23 T and rotated at 1800 rpm (30 Hz) without any sample mounted.
The calibration curve between temperature rise and fixed heat load in copper sample at 80 K.
Variation in temperature rise against frequency with varied from 0.07 to 0.23 T in copper sample.
ac loss in copper sample to establish the loss measurement technique at 80 K
Temperature rise due to total ac loss in sample 1 when exposed to rotating magnetic field at 84 K.
Temperature rise due to total ac loss in sample 1 neutralized when exposed to rotating magnetic field at 84 K.
The calibration curve obtained to establish temperature rise in (a) the sample holder only with open symbols and (b) sample holder with the sample 1-neutralized with solid symbols against a fixed heat load.
Total ac loss in sample 1 HTS YBCO-123 coated conductor.
Brief summary of rotating magnet assembly.
Samples used in the measurement of ac losses and calibrating the test rig.
Sample 1 temperature rise with frequency at 0.1 T.
Heat load worked out due to temperature rise.
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