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. 2021 Mar 25;11:6881. doi: 10.1038/s41598-021-86234-x

Figure 4.

Figure 4

(a) Sketch of the point like pinhole magnification system. (b) Typical proton signal on MCP obtained with configuration of 20 μm slit and 20 μm pinhole that corresponds to 44 keV energy bandwidth (FWHM) and proton trace width of 0.98 mm. (c) Proton signal on MCP obtained with FLUKA simulation reproducing an experimental result of energy bandwidth of 44 keV (FWHM) and width of 1 mm using initial source size of 150 μm.