| 摘要 |
The invention concerns a method for charging a magnet arrangement ( 20 ) comprising a first partial region ( 21 ) which can be superconductingly short-circuited via an additional switch ( 23 ), and a second partial region ( 22 ), wherein the two partial regions ( 21, 22 ) generate, in an investigational volume ( 8 ), gradients of second order having different signs. A magnetic field dependence B* is measured close to the desired operating state of the magnet arrangement ( 20 ) and operating currents are determined for each of the two partial regions ( 21, 22 ) at which the overall magnetic field B in the volume ( 8 ) under investigation is freed from a magnetic field gradient of second order. These operating currents are set thereby taking into consideration the inductive coupling of the partial regions ( 21, 22 ) through initially charging of the overall magnet arrangement ( 20 ) and, after closing of the additional switch ( 23 ), through continuation of charging only in the second partial region ( 22 ). The magnetic field homogeneity of the magnet arrangement ( 20 ) can thereby be improved in a simple and inexpensive manner.
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