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为了在中能X射线范围进行照射量测量标准化,研制了自由空气电离室。电离室的设计突出了按定义精确测量照射量的要求和机械结构的稳定性。对影响照射量测量的主要因素进行了实验测定。测量照射量的总不确定度为±0.48％。测量的长期变化(三年)为±0.24％。
In order to standardize the exposure measurement in the medium energy X-ray range, a free air ionization chamber was developed. The design of the ionization chamber highlights the need to precisely measure the amount of exposure as defined by the definition and the stability of the mechanical structure. The main factors affecting the measurement of exposure were experimentally determined. The total uncertainty in measuring the exposure is ± 0.48%. Long-term changes in measurement (three years) were ± 0.24%.