A New Technology for Fast Two-Dimensional Detection of Proton Therapy Beams

<table>Fourier transform of ionization current collected using the double-scattered proton delivery technique. We measure the wheel rotational frequency to be 10.0046 ± 0.0032 Hz.</table>

Physics Research International

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Figure 14

Figure 14: A New Technology for Fast Two-Dimensional Detection of Proton Therapy Beams 