| Researchers | Syed Furqan Abbas Hashmi and Muhammad Usman Baig | ||||||||
| Time Frame | Summer 2018 | ||||||||
| Supplementary Materials | Magnetic Field Mapper Supporting Material | ||||||||
| Description | |||||||||
Samples that needed to be analysed by NMR Spectroscopy have to be subjected to a homogeneous magnetic field so that they can process once they are subject to the Larmor Frequency. While supercooled magnets are used to generate homogeneous fields within Industry level NMR Spectrometers, a different approach has to be employed when working with table-top NMR Spectrometers. Claus Halbach’s dipole magnet design was utilised to formulate a magnetic array which provided a strong homogeneous magnetic field with reasonable homogeneity. Moreover, a magnetic field mapping device was made in order to map magnetic fields of various sources across two dimensions, taking reading up to the accuracy of 0.01mm. The area across which the readings could be taken was 25mmx25mm. To assemble the device, two motorized translation stages were connected to each other perpendicularly, giving freedom of motion across two axes. These motors were controlled by servo controllers who were connected to a computer. A Hall Probe was connected to the stages and it took readings as the stages moved. The Hall Probe was connected to a National Instruments DAQ which passed on the Hall Probe readings to the computer. The whole process was controlled by a Lab View application designed specifically for this task.
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