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基于中国原子能科学研究院核物理所串列加速器R20支线管道改造的辐射生物终端适用于进行DNA、细胞、细菌和种子等方面的辐射生物研究。改造完成后,为后续的辐射生物实验的顺利开展,对质子束流的各种品质进行测量,包括束斑大小,束斑均匀性,注量率测量和探测器测定等。首先,利用束线管道上的散焦磁铁可将圆点形状的束斑散开形成直径超过80 mm的圆斑,经过50 mm×50 mm的限束光阑后得到了一个方形束斑,经探测器测量确定束斑大小至少为50 mm×50 mm。随后对塑料闪烁体探测器的坪曲线进行测定,在其稳定工作电压下利用金硅面垒半导体探
The Radiation Biology Terminal based on the R20 Branch Pipeline of the Tandem Accelerator of Nuclear Physics Institute of China Institute of Atomic Energy is suitable for studying radiation biology in DNA, cells, bacteria and seeds. After the completion of the transformation, follow-up of radiation biological experiments carried out smoothly, the quality of the proton beam were measured, including beam spot size, beam uniformity, flu rate measurement and detector measurements. First of all, by using the defocusing magnet on the beamline pipe, the dots of dot shape can be scattered to form the circular spot with a diameter of more than 80 mm. After passing through the confining stop of 50 mm × 50 mm, a square beam spot is obtained. The detector measures the beam spot size of at least 50 mm × 50 mm. Subsequently, the plastic scintillator detector flat curve was measured at its stable operating voltage of the use of gold silicon surface barrier semiconductor probe