石英光纤抗辐照加固的研究

Research on Anti Radiation of Silica Fiber

研究了石英光纤辐照后的损耗，讨论了石英光纤抗辐射加固的方法，得出了石英光纤中有色离子（如Ｆｅ、Ｃｒ、Ｍｎ、Ｃｕ、Ｃｏ、Ｎｉ等）不利于抗辐照的结果．由于光纤辐照后的恢复特性，辐射引起的损耗与辐照剂量速率有关，辐照剂量速率越大，它承受的总剂量越小；且实验研究发现，预辐照对提高光纤的抗辐照性能有好处．

The radiation induced loss in silica fiber was studied and the way on anti radiation of silica fiber was discussed. It shows that the colourated positive ions (for example Fe, Cr, Mn, Cu, Co, Ni) in the silica fiber is harmful to the anti radiation of silica fiber. Because the recovery begins as soon as the radiation induced loss begins, the faster the dose rate is, the smaller the total dose is when the fiber is of failure. The experiment indicates that the pre irradiation of fiber is of advantage for the anti radiation of fiber. The results are helpful for the use of silica fiber in radioactive environments.