| 摘要 |
<p>The objective is to eliminate the effect of the hysteresis of a scanning electromagnet so that, in the raster scanning or the hybrid scanning, there is obtained a particle beam irradiation apparatus that realizes high-accuracy beam irradiation. There are provided a scanning power source (4) that outputs the excitation current for a scanning electromagnet (3) and an irradiation control apparatus (5) that controls the scanning power source (4); the irradiation control apparatus (5) is provided with a scanning electromagnet command value learning generator (37) that evaluates the result of a run-through, which is a series of irradiation operations through a command value (I k ) for the excitation current output from the scanning power source (4), that updates the command value (I k ) for the excitation current, when the result of the evaluation does not satisfy a predetermined condition, so as to perform the run-through, and that outputs to the scanning power source (4) the command value (I k ) for the excitation current such that its evaluation result has satisfied the predetermined condition.</p> |
