A novel and cost-effective optical detection of high magnitude current and magnetic pulses through a metallic cantilever. (1st December 2022)

• Record Type: Journal Article
• Authors: Ullah, Rahim; Hussain, Ghazanfar; Faisal, Muhammad
• Is Part Of: Laser physics. Volume 32:Number 12(2022)
• Publication Date: 2022-12-01
• Subjects: macroscopic cantilever -- magneto-optic effect -- high magnitude current and magnetic pulses -- peak to peak (P–P) photovoltage; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1555-6611/ac9527
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: We report a novel optical technique to measure short duration high magnitude current and magnetic pulses based on deflection of a macroscopic ferromagnetic cantilever. Deflection of the cantilever as a transducer takes place due to the attraction by an electromagnet. The reflected laser beam from a small thin mirror at tip of the cantilever is scanned over two spatially distinct photodetectors. Different high magnitude magnetic pulses are produced by discharging a capacitor bank through an inductive coil with a ferrite core. The response of the sensor is observed at different charging limits of the capacitor bank and spatial intervals between cantilever and inductive coil. A repeatable and linear response is detected by the devised sensors in the range 158.53–380.47 A current and 0.19–0.48 T magnetic field with sensitivity of 39.15 A kV −1 and 50.98 mT kV −1 for current and magnetic field amplitudes respectively in response to 2.5–6.0 kV charging of the capacitor bank. The proposed technique is remote, nondestructive, cost-effective and has a large dynamic range.