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| TUPWI007 |
Algorithm of Reconstructing Particle Distribution in N-dimensional Phase Space from Profile in Beam Transport |
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- T. Aoki
Hitachi Ltd., Ibaraki-ken, Japan
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In particle beam therapy, it is demanded to improve measurement of beam extracted from accelerator in order to realize more conformal irradiation. We developed a method of reconstructing particle distribution from measured profile in beam transport. In this method, particle distribution is obtained by solving a following equation: I=Dρ, where I is a counted number of particles at a single channel of the profile monitor, D is a matrix representing relation between I and ρ, and ρ is number of particles included in a single n-dimensional voxel of phase space at start point of the beam transport. D is a n×m matrix, where n is number of data which obtained under multiple conditions of beam transport, and m is number of voxels of phase space to be reconstructed. We succeeded formulation of D matrix from transportation matrix of the beam transport R, and discovered that D is formulated as piecewise-polynomials of elements of R. By this method, it is enable to reconstruct the particle distribution in arbitrary dimensional phase space. We show details of the formulation of D and results of simulations of reconstruction of particle distribution in phase space by this method.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWI007
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