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The influence of the recording field direction on the linearity of the transition is investigated when a signal is recorded on hard disks whose recording layers have the stacked structure. It is found that the linearity of the transition increases with increase of the ratio of the in-plane component of the recording field to the perpendicular one, and the recording field direction dependence of the...
Vacuum arc phenomena under various axial magnetic fields are observed using high speed VTRs. We use disk type contacts and axial magnetic fields generated by external coils. First, we confirmed the arc behavior and arc voltage under various axial magnetic fields. As already known, the behavior of vacuum arcs and arc voltage are stabilized by increasing the axial magnetic fields. Second, using small...
Accurate measurement of difference between energy levels of positronium is a current important subject in the experimental physics of elementary particles. The frequency corresponding to the energy difference is about 203.39 GHz. At least, 100 watt CW power is requested for the direct measurement. We are now designing such a gyrotron FU CW V consisting of an 8 T superconducting magnet and a demountable...
The tetrapolar circuit method has been used to detect physiological events as changes in electrical impedance. However, it is still difficult to obtain more meaningful information of local events because of the expanse of current distribution. In order to measure the local impedance change in living tissue, the authors propose a tetrapolar circuit method using a magnetic field. In this method, an...
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