The concept of an active dosimetry system for pulsed radiation dose rate measurements is presented. Real-time distinction of pulsed and non-pulsed radiation contributions is based on the time structure of a single interaction. A fast tissue equivalent plastic scintillator is exploited to minimize the pile-up effect influence on absorbed energy measurements. Being connected to a fully digital signal processing board, the detector creates an active dosimetry system with adjustable parameters. With this system, absorbed dose rate measurements were carried out in a photon field with a time structure mimicking a radiotherapeutic beam, but also in the presence of a constant radiation field. Measurements show a linear dependence of a pulsed radiation contribution on the accelerator current in the investigated range of the total dose rate up to 8 μGy h⁻¹. While increasing the accelerator current by 1 μA, the pulsed radiation dose rate grows by (26.2 ± 0.9) nGy h⁻¹ when considering pile-up events.

中文翻译：

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可以区分脉冲和非脉冲剂量贡献的文档。

提出了用于脉冲辐射剂量率测量的有源剂量测定系统的概念。脉冲和非脉冲辐射贡献的实时区分基于单个交互作用的时间结构。快速组织等效塑料闪烁体被利用来最小化堆积效应对吸收能量测量的影响。该检测器与全数字信号处理板相连，可创建一个参数可调的有源剂量测定系统。利用该系统，在具有模仿放射治疗束的时间结构的光子场中，以及在恒定辐射场的情况下，进行了吸收剂量率测量。测量结果表明，在高达8μGyh的总剂量率研究范围内，脉冲辐射对加速器电流的线性关系^-1。当考虑加速器电流增加1μA时，考虑到堆积事件，脉冲辐射剂量率将增长（26.2±0.9）nGy h ^-1。