Abstract
We introduce a technique to measure the maximum magnetic field of a submicrosecond duration pulse using magnetic CoPt thin films. In the present experiment, this technique yields a lower limit for the field intensity and reveals the sense of that peak field. The time-varying magnetic field was generated by an exploding wire array plasma called an X pinch. Using a Quantum Design Superconducting Quantum Interference Device magnetometer, two thin films were initialized with remnant magnetization along a specific direction. The two films were then placed near an X-pinch plasma column with magnetizations in opposite directions. The current driven through the X pinch induced a change in magnetization in the films, which implied a lower bound of 17 kOe for the magnitude of the maximum magnetic field to which the film was exposed.
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