An experimental campaign was carried out at the NASA Space Radiation Laboratory to perform an additional, independent dosimetric characterization of the beams of protons, helium and carbon ions for radiobiological experiments. The campaign was undertaken by the request and with the support from the National Cancer Institute, U.S. In this initial phase, the goals were to obtain a first assessment of the dosimetric reproducibility of the beam control system, including analysis of spatial homogeneity and evaluation of ion beam contamination. They should facilitate the design of further experimental campaigns for beam characterization for radiobiological experiments. Measurements included reference dosimetry with comparison of in-house and external ionization chambers and electrometers, lateral-dose profile measurements in air, depth-dose profile in a water tank, evaluation of water equivalent thickness of a HDPE binary range shifter and estimation of impurities of the investigated h...

中文翻译：

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NSRL在放射生物学实验中的光束表征-第一阶段

在NASA太空辐射实验室进行了一项实验活动，以对放射生物学实验的质子，氦气和碳离子束进行额外的，独立的剂量学表征。该活动是根据要求并在美国国家癌症研究所的支持下进行的。在此初始阶段，目标是对射束控制系统的剂量学可重复性进行首次评估，包括空间均匀性分析和离子评估光束污染。它们应有助于为放射生物学实验的射束表征设计进一步的实验方案。测量包括参考剂量测定法，室内和外部电离室和静电计的比较，空气中的横向剂量分布测量，