A beam monitor using silicon pixel sensors for hadron therapy
| Autor: | Nu Xu, Hui-Li Kang, Jun Liu, Guangming Huang, Shuguang Zou, Ping Yang, Zhen Wang, Chaosong Gao, Dong Wang, H. Pei, Daming Sun, Le Xiao, Yan Fan, Xiangming Sun |
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| Rok vydání: | 2017 |
| Předmět: |
Nuclear and High Energy Physics
medicine.medical_specialty Physics - Instrumentation and Detectors Silicon FOS: Physical sciences chemistry.chemical_element 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Optics 0103 physical sciences medicine Radiation damage Medical physics Angular resolution Instrumentation Physics Pixel 010308 nuclear & particles physics business.industry Instrumentation and Detectors (physics.ins-det) Physics - Medical Physics Anode CMOS chemistry Physics::Accelerator Physics Medical Physics (physics.med-ph) business Intensity (heat transfer) Beam (structure) |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 849:20-24 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2016.12.050 |
| Popis: | We report the design and test results of a beam monitor developed for online monitoring in hadron therapy. The beam monitor uses eight silicon pixel sensors, \textit{Topmetal-${II}^-$}, as the anode array. \textit{Topmetal-${II}^-$} is a charge sensor designed in a CMOS 0.35 $\mu$m technology. Each \textit{Topmetal-${II}^-$} sensor has $72\times72$ pixels and the pixel size is $83\times83$ $\mu$m$^2$. In our design, the beam passes through the beam monitor without hitting the electrodes, making the beam monitor especially suitable for monitoring heavy ion beams. This design also reduces radiation damage to the beam monitor itself. The beam monitor is tested with a carbon ion beam at the Heavy Ion Research Facility in Lanzhou (HIRFL). Results indicate that the beam monitor can measure position, incidence angle and intensity of the beam with a position resolution better than 20 $\mu$m, angular resolution about 0.5$^\circ$ and intensity statistical accuracy better than 2$\%$. |
| Databáze: | OpenAIRE |
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