| 摘要 |
PURPOSE:To discriminate the propriety in a short time, by applying power to a rotating magnetic field coil of a magnetic bubble module having an inter-surface DC magnetic field set at assembling from an external DC power supply, superimposing the DC inter-surface magnetic field and performing check with a synthesized inter-surface DC magnetic field to be changed. CONSTITUTION:A magnetic bubble module 11 has the inter-surface DC magnetic field set at the assembling. The external DC power supply 14 is given to a terminal 13 of a rotating magnetic field coil of the module 11, the DC magnetic field is impressed by flowing a current to be superimoposed on the DC magnetic field set at the assembling. The direction impressing the external inter-surface DC magnetic field is the direction cancelling the preset inter-surface DC magnetic field is the direction cancelling the preset inter-surface DC magnetic field. |
