PARTICLE BEAM POSITION STABILIZER, METHOD AND PARTICLE BEAM IRRADIATION DEVICE
PROBLEM TO BE SOLVED: To provide a particle beam position stabilizer which simplifies beam track adjustment work.SOLUTION: A particle beam position stabilizer 40 has: at least two position sensors 42, 43 through which a particle beam passes; a center-of-gravity position calculation part 44 for calcu...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a particle beam position stabilizer which simplifies beam track adjustment work.SOLUTION: A particle beam position stabilizer 40 has: at least two position sensors 42, 43 through which a particle beam passes; a center-of-gravity position calculation part 44 for calculating a position of the center of gravity of the particle beam; a beam position and angle calculation part 45 for calculating a beam incidence position and a beam incident angle from the calculated position of the center of gravity; steering electromagnets 41a, 41b for deflecting the beam incident angle; and a feedback control part 46 for calculating a correction value for the beam angle deflected by the steering electromagnets 41a, 41b from a deviation amount between the beam incidence position and beam incident angle calculated by the beam position and angle calculation part 45 and assumed beam target position and beam target angle, and outputting the correction value to the steering electromagnets 41a, 41b.SELECTED DRAWING: Figure 2
【課題】ビーム軌道の調整作業の簡素化を図った粒子線ビーム位置安定化装置を提供する。【解決手段】実施形態の粒子線ビーム位置安定化装置40は、粒子線ビームが通過する少なくとも2つの位置センサ42,43と、粒子線ビームの重心位置を算出する重心位置算出部44と、算出された重心位置から、ビーム入射位置及びビーム入射角度を算出するビーム位置及び角度算出部45と、ビーム入射角度を偏向させるステアリング電磁石41a,41bと、ビーム位置及び角度算出部45により算出したビーム入射位置及びビーム入射角度と、想定しているビーム目標位置及びビーム目標角度とのずれ量から、ステアリング電磁石41a,41bのビーム偏向角に対する補正値を算出し、この補正値をステアリング電磁石41a,41bに出力するフィードバック制御部46と、を備える。【選択図】図2 |
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