| Paper | Title | Page |
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THP12 |
Computation of an Uniform Irradiation Method for the Vertical Proton Beam using Chi-square fitting and 2D Target Stage | |
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Funding: Ministry of Educational Science and Technology(MEST) There are several methods to implement uniform irradiation on the wide target area for accelerated ion beam. Usually, the methods can be divided into two categories, in terms of physical perspective and algorithmic one. Moving beam or target itself belong to the former, while scanning algorithm like spot, raster, and line, belongs to the latter. In this work, we computed an uniform irradiation method for the vertical proton beam using chi-square fitting and XY target stage. The reasons why we select the target movement method instead of the beam itself are that there was not enough space to install the large magnet for modification of accelerated beam path within gantry system of MC-50 cyclotron, and also it was impossible to modify the structure of the gantry system itself. Beam scanning algorithms, spot, raster, and line scan, were applied to the motion control program of the target stage after carrying out a computer simulation using chi-square fitting for obtaining the optimal solution under the required conditions. We performed experiment at vertical beam-line of the MC-50 cyclotron gantry in KIRAMS and compared the experimental result with the simulated one. |
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