Develop a high energy proton beam position monitor using linear contact image sensor

Tung-Yuan Hsiao,Huan Niu,Tzung-Yuang Chen,Chien-Hsu Chen

doi:10.1016/j.mex.2019.100773

Abstract

A compact beam-position monitor was constructed using a linear contact image sensor attached to a plastic scintillator and tested using a 230 MeV proton beam. The results indicate that the beam position can be obtained in real-time, and the beam position with a precision of up to 0.03 mm. The compactness and high precision of the device hold considerable potential for it to be used as a beam-position monitor and offline, daily quality assurance monitor in hadron therapy.•The method can provide a high precision and high resolution beam position for flash irradiation in particle therapy in real-time.•The method using contact image sensor with scintillator does not require a long focal length for camera and it is free of image distortion.•The method can be integrated into medical particle accelerator for feedback control and daily quality assurance.

Highlights

IntroductionHigh-energy ion beams (proton and carbon) hold great potential in the field of radiation oncology due to their special Bragg peak characteristics, permitting the deposition of most of the beam’s energy within a narrow depth range.[1] In radiation therapy, accurate and precise delivery of a specific radiation dose to the tumor site is crucial, and different beam monitors have been developed
High-energy ion beams hold great potential in the field of radiation oncology due to their special Bragg peak characteristics, permitting the deposition of most of the beam’s energy within a narrow depth range.[1]
We present the first-time use of a plastic scintillator attached to a slim Contact Image Sensor (CIS) (PS+CIS) to monitor the position and profile of a high-energy proton beam

Summary

Introduction

High-energy ion beams (proton and carbon) hold great potential in the field of radiation oncology due to their special Bragg peak characteristics, permitting the deposition of most of the beam’s energy within a narrow depth range.[1] In radiation therapy, accurate and precise delivery of a specific radiation dose to the tumor site is crucial, and different beam monitors have been developed . These devices have been equipped with on beam-line for beam adjustment and for day-to-day beam quality assurance. The use of scintillator fibers can obviate the installation-space challenge, but it unavoidably presents a complex and expensive frontend readout system problem.[6]

Methods

Results

Conclusion