Schematic of the inner side of the ITER vacuum vessel. Alpha particles lost from the plasma bombard mostly the BM Nos. 16, 17, and 18.
Poloidal projections of the alpha particles bombarding at the center of the blanket [(a) and (b)] module No. 16 and [(c) and (d)] No. 17 [(a) and (c)] under scenario 2 and [(b) and (d)] the scenario 4. The pitch angles at the striking points are .
A schematic of scintillation probe design with an aperture 1 cm inside the BM.
(a) A schematic of one BM modification with tilted FW panel. (b) Orbit length of alpha particles striking the aperture position with the depth of 2, 3, and 4 cm with the modification of (a) one BM.
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