A beam monitor using silicon pixel sensors for hadron therapy
A beam monitor using silicon pixel sensors for hadron therapy
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DOI：
10.1016/j.nima.2016.12.050
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发表时间：
2016-11
影响因子：
1.4
通讯作者：
Zhen Wang;S. Zou;Yan Fan;Jun Liu;Xiangming Sun;Dong Wang;Hui-Li Kang;Daming Sun;P. Yang;H. Pei;Guangming Huang;N. Xu;C. Gao;L. Xiao
中科院分区：
文献类型：
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作者：
Zhen Wang;S. Zou;Yan Fan;Jun Liu;Xiangming Sun;Dong Wang;Hui-Li Kang;Daming Sun;P. Yang;H. Pei;Guangming Huang;N. Xu;C. Gao;L. Xiao
我们报道了一个用于强子治疗在线监测的束流监测器的设计和测试结果。电子束监控器使用8个硅像素传感器Topmetal-II-作为阳极阵列。Topmetal-II-是一种采用CMOS 0.35 µm技术设计的电荷传感器。每个Topmetal-II传感器都有72×72像素，像素大小为83×83 µm2。在我们的设计中，束流穿过束流监测器而不撞击电极，使得束流监测器特别适合于监测重离子束。这种设计还减少了对射束监视器本身的辐射损伤。在兰州重离子加速器（HIRFL）上用碳离子束对束流监测器进行了测试。结果表明，该束流监测器可以测量束流的位置、入射角和强度，位置分辨率优于20 μm，角分辨率约为0.5°，强度统计精度优于2%。
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,Topmetal-II-, as the anode array.Topmetal-II-is a charge sensor designed in a CMOS 0.35 µm technology. EachTopmetal-II-sensor has 72×72 pixels and the pixel size is 83×83 µm2. 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 µm, angular resolution about 0.5° and intensity statistical accuracy better than 2%.