3D simulation and analysis of the magnetic field from a double-hexapole
Abstract
The magnetic field of a double hexapole configuration was simulated for different separation distances and magnet orientations. The simulation parameters were patterned closely with that of the double hexapole of the ECR device of the Plasma Physics Laboratory at the National Institute of Physics. Results show a characteristic hexapole magnetic field with a resonance surface (corresponding to a frequency of 2.45 GHz) located approximately 0.95 cm below the wall occupied by the magnets, and a maximum magnetic field strength of 0.329 T. Simulated magnetic field values agree very well with actual measurements. Increasing the separation distance between the hexapoles would tend to increase the region of relatively weak magnetic field that may be favorable for some applications. Predicted optimal configuration regarding the device is achieved when the magnets are oriented alternately around each hexapole and with the hexapoles being in opposite polarities with respect to each other.
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