自动跟踪式核磁共振磁强计

AN AUTOMATIC TRACKING N.M.R. MAGNETOMETER

本文介绍的核磁共振磁强计能自动搜索被测磁场值并能跟踪磁场值的变化,同时将被测磁场强度值用数字显示出来。配用低温探头时,可在4.2K低温下测定超导磁体内的磁场强度,测磁范围为1—13.5T,在磁场梯度等△H/H<10-4（1cm3）时,准确度为5×10-5。配用室温探头时,可测定电磁铁、永磁铁及超导磁体室温孔内的磁场强度,测磁范围为0.03—

A scheme of a new automatic field-searching and tracking N. M. R. magnetometer is presented. With a low temperature probe, it can be used to measure the field strength of a superconductor magnet in 4.2K directly. The measuring range is from 1 to 13.5T, the accuracy up to 5×10^(-5) with a grandient of the measured field is not more than 10^(-4)(1cm^3). Using a room temperature probe, it can be used to measure the field strength from 0.03 to 27T with an accuracy up to 5×10^(-6).