SCANNING MAGNET AND PARTICLE THERAPY SYSTEM
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United States of America Patent
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Issued Date -
Jun 9, 2022
app pub date -
Jun 30, 2020
filing date -
Jun 30, 2020
priority date (Note) -
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Abstract
A scanning magnet that deflects a charged particle beam has a winding U provided with grooves SL1 and SL4 provided at facing positions. A passing direction of a conductive wire forming the winding U passes through the groove SL1 in a γ-axis positive direction, and passes through the groove SL4 in a γ-axis negative direction. The winding U has a loop path SL1-SL4 in which the groove SL1 is directed to the γ-axis positive direction, and the groove SL4 is directed to the γ-axis negative direction. When a current flows in the γ-axis positive direction in a winding section U+ disposed in the groove SL1, a current flows in the γ-axis negative direction in a winding section U− disposed in the groove SL4. A yoke, the winding U, a winding V, and a winding W have a 120° rotationally symmetric structure with respect to a central axis of the yoke.
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