Multi-dimensional fiber-optic radiation sensor for ocular proton therapy dosimetry

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2012-12, Vol.695, p.322-325
• Main Authors: Jang, K.W., Yoo, W.J., Moon, J., Han, K.T., Park, B.G., Shin, D., Park, S-Y., Lee, B.
• Format: Article
• Language: English
• Subjects: Fiber-optic radiation sensor; Organic scintillator; Proton; Radiation dosimeter
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2011.09.063

In this study, we fabricated a multi-dimensional fiber-optic radiation sensor, which consists of organic scintillators, plastic optical fibers and a water phantom with a polymethyl methacrylate structure for the ocular proton therapy dosimetry. For the purpose of sensor characterization, we measured the spread out Bragg-peak of 120MeV proton beam using a one-dimensional sensor array, which has 30 fiber-optic radiation sensors with a 1.5mm interval. A uniform region of spread out Bragg-peak using the one-dimensional fiber-optic radiation sensor was obtained from 20 to 25mm depth of a phantom. In addition, the Bragg-peak of 109MeV proton beam was measured at the depth of 11.5mm of a phantom using a two-dimensional sensor array, which has 10×3 sensor array with a 0.5mm interval.