Abstract: According to an embodiment, a detector pack includes a first substrate, an X-ray detection unit, a second substrate, and a data acquisition device. The first substrate includes a first main surface and a second main surface. The X-ray detection unit is provided in the first main surface, converts an X-ray into an electrical signal, and outputs the electrical signal. The second substrate includes a third main surface and a fourth main surface and is disposed in a posture of making the third main surface face the second main surface. The data acquisition device is provided in at least any one of the third main surface and the fourth main surface.

Abstract: According to an embodiment, a detector pack comprises a first substrate and a second substrate. the first substrate includes a first surface and a second surface. the first substrate is provided with an X-ray detecting element in the first surface. the second substrate includes a third surface and a fourth surface. The second substrate is disposed in the second surface to face the third surface. The second substrate is provided with a data acquisition circuit in the third surface. The first substrate and the second substrate are formed as a stacked body. The data acquisition circuit is provided in the third surface not to come in contact with the second surface of the first substrate.

Abstract: According to an embodiment, a detector pack includes a first substrate, an X-ray detection unit, a second substrate, and a data acquisition device. The first substrate includes a first main surface and a second main surface. The X-ray detection unit is provided in the first main surface, converts an X-ray into an electrical signal, and outputs the electrical signal. The second substrate includes a third main surface and a fourth main surface and is disposed in a posture of making the third main surface face the second main surface. The data acquisition device is provided in at least any one of the third main surface and the fourth main surface.

Abstract: In a permanent magnet motor, a stator includes an annular stator core and a plurality of stator windings wound on the stator core so that a plurality of phases are composed. A rotor is rotatably mounted with a predetermined air gap between it and an inner peripheral face of the stator core. The rotor includes a rotor core having a plurality of slots and a plurality of permanent magnets embedded in the slots respectively. Each permanent magnet having a generally arc-shaped cross section is embedded in the slot so that its convex portion is directed toward a rotor axis. Each permanent magnet is magnetized so that directions of easy magnetization are concentrated on a point C at a side of center of curvature thereof. The relation between a distance L between the point C and a center line passing the center of each permanent magnet in the direction of the thickness thereof and a mean radius of curvature R of the permanent magnets is shown by the expression, 1.0.times.R.ltoreq.L.ltoreq.7.5.times.R.