The shape of this bucket coil current is shown in Fig. 3.7. The main feature is a relatively flat current after reaching its peak (<5% droop) during the acceleration period. To prevent unnecessary heating of the bucket coils a 20 resistor is connected across the capacitor to quickly discharge it at time A bucket with an = 0.514 was tested at liquid nitrogen temperature to obtain its total ( ) coil current waveform. The circuit parameters and operating point were used then to calculate the total coil current using the previously derived equation. The following values were used: where initial capacitor voltage bucket coil inductance bucket coil resistance (at 77°K) capacitor bank capacitance 176 Q (meas) 2.68 h (theory) 6000 turns (meas) 10,000 uf (label) 100 volts (meas)
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