Device and method for compensating magnetic field distortions in magnetic fields with high field homogeneity

摘要

a device for the offset of feldstu00f6rungen in magnetic fields of electromagnets with high field homogeneity and, in particular, to stabilize the h0 - field of a mr big, full, at least one felddetektor (31) to capture ranging (uin), at least one control circuit z to edit the data transmitter (uin), and at least one kompensationsspule (34)the collected and processed ausgangsstu00f6rsignale (uout) transmitted and what a korrekturfeld to compensate the transmitter (uin) is produced, is characterised by the fact that at least one of the loops, a multiselektives filtration system (35) includes one or more of a many selective filter is operated in parallel.the mittelfrequenzen either unique or adaptive to the frequenzwerte of contrasting transmitter (uin) to adapt, with the outputs of the filter elements with at least one of the kompensationsspulen (34) are connected.the erfindungsgemu00e4u00dfe device allows a selective recording of periodic feldstu00f6rungen with high frequency components, whereas a large part of the existing noise disappears and, therefore, are to be increased.