IRM (Impulse Magnetizer)

Model/Make: IM-10-30/ASC Scientific, USA


This instrument generates short duration magnetic fields of up to 11 KGauss within the sample coil. It enables a variety of high-field magnetic studies to be conducted on geologic samples without the need for a large electromagnet.


The IM-10 is ideally suited for IRM and anisotropy of IRM acquisition studies. The instrument comes with a sample holder which is designed to hold 1″ cubic samples as well as 1″ diameter cores in various orientations. The sample cavity is large enough to accommodate cubic samples up to 1.40″ and cylindrical samples up to 1.95″ (aligned along the coil axis). The electronics and sample coil are housed in a single high impact ABS plastic case.


The magnetic field is produced by discharge of energy from a capacitor bank through a coil surrounding the sample cavity. The capacitor bank is first charged to the desired voltage (corresponding to the desired field). It is then discharged through the coil very quickly using a high capacity SCR as a switch. Because very high current levels are involved, the coil and all circuitry are totally contained in a single case.