基于波移光纤及硅光电倍增管的钚气溶胶测量系统北大核心CSCD

钚气溶胶测量是进行钚材料相关实验研究的基础。为了确保辐射安全,常需将钚材料密封于密闭容器内以实现对钚气溶胶的包容,商用钚气溶胶监测设备由于难以放入含钚密闭容器而不适用于该应用场景下钚气溶胶浓度的监测。使用ZnS(Ag)闪烁体作为辐射灵敏材料放置于含钚密闭容器内,通过波移光纤将闪烁体信号引出密闭容器,并通过硅光电倍增管实现对闪烁体信号的采集,使用该技术路线建立的钚气溶胶测量系统能够用于密闭容器内钚气溶胶的测量。该测量系统可根据具体需求实现对探测器尺寸、形状的定制,具有功耗低,结构相对简单等优点,实现了密闭容器内钚气溶胶的远程就地测量,具备n/γ混合辐射场下α粒子甄别测量能力。

Plutonium aerosol measurement system based on wavelength shift fiber and silicon photomultiplier

It is necessary to monitor plutonium aerosol when doing experimental research with plutonium material. Plutonium material experiments are usually carried out in sealed containers, which guarantees that the plutonium aerosol will not leak out to the environment. The widely-used monitoring equipment are not suitable for plutonium aerosol monitoring in sealed containers because of its large volume. A new plutonium aerosol measurement system based on wavelength shift fiber and silicon photomultiplier (SiPM) is developed. In the new plutonium aerosol measurement system, ZnS(Ag) scintillator is used as detection material and wavelength shift fiber is used as photon transmission media . The new plutonium aerosol measurement system has the advantages of customizable detector size and shape, low power consumption, and relatively simple structure, which realizes remote measurement of plutonium aerosol in sealed containers. The measurement system can also discriminate α particles in n/γ-mixed radiation field.