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在电线电缆辐射加工中,测量绝缘介质层中的电子吸收剂量及其分布,从而为实现产品质量控制提供了技术保证。根据电子束辐照电线电缆的工艺特点,利用经硫酸铈化学剂量计校准的带状兰色赛璐芬或三醋酸纤维素薄膜剂量计缠绕在电线电缆的芯线上,模拟电缆的介质层。在自行改装的扫描分光光度计上连续读测薄膜的光密度变化,曲线的每一个波峰代表了每一层剂量分布的极大值,其包络线代表了在射束方向上的介质层中的深度剂量分布。利用碰撞阻止本领比,可以得到绝缘介质中吸收剂量及其分布。实验表明,介质层中的剂量分布是以下三个过程的累积效应:电子能量随深度的变化;从芯线表面的电子反散射贡献;来自邻近线缆和辅助设备的散射线的贡献。
In the radiation processing of wire and cable, measuring the amount of electron absorbed in the insulating medium layer and its distribution, so as to achieve product quality control provides technical assurance. According to the process characteristics of the electron beam irradiated wire and cable, the tape is coated on the core of the wire and cable by using a tape-like Cycloporphyrin or triacetyl cellulose film dosimeter calibrated with a cerium sulfate chemical dosimeter to simulate the dielectric layer of the cable. The optical densities of the films were read continuously on a self-scanning scanning spectrophotometer. Each peak of the curve represented the maximum of the dose distribution for each layer. The envelope represents the medium in the beam direction Depth dose distribution. The use of collision-to-stop ratio, you can get the insulation medium absorbed dose and its distribution. Experiments have shown that the dose distribution in a dielectric layer is the cumulative effect of three processes: the variation of electron energy with depth; the electron backscatter contribution from the surface of the core; the contribution of scattered radiation from adjacent cables and auxiliaries.