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An Seohyeon,Lee Se Byeong,Kim Tae Jeong,Hahn Garam 한국물리학회 2024 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.84 No.1
This study presents a beam profle monitor composed of a vacuum chamber housing, a scintillator screen, a digital camera, and a custom control circuit based on Raspberry Pi for an accurate measurement of beam profles with a high spatial resolution which is crucial for beam quality assessment and control for the therapeutic beamline. A simple position calibration that uses perspective transform was conducted to map from the pixel space to real space. Additionally, we investigated fnding a proper noise fltering methods to mitigate stray and impulsive noises. We found that the non-local de-noising algorithm outperformed than median flter for reducing noise in a high-frequency region. As a demonstration of utilization of the profle monitor, we measured transverse beam emittances along the x and y axes using quadrupole scanning technique, which were resulted in 2.715±0.017 and 4.619±0.018 π mm mrad, respectively.