强激光与粒子束2026，Vol.38Issue(6)：63-67,5.DOI:10.11884/HPLPB202638.250392
氟化铅超快响应光电倍增管研制及性能研究
Development and performance study of lead fluoride ultrafast response photomultiplier tube
金真 1赵敏 1侯巍 1李安然 1孙建宁 1王宁 1李婧雯 1王兴超 1司曙光 1吴凯 1吴超 1黄国瑞1
作者信息
- 1. 北方夜视科技(南京)研究院有限公司,江苏 南京 211106
- 折叠
摘要
Abstract
[Background]Typically,radiation detectors require an additional coupled scintillator layer to convert incident radiation rays into optical signals,which are then received by the detector.Compared to other types of glass,lead fluoride(PbF2)glass has a high refractive index,and when electrons pass through a lead fluoride crystal,they generate Cherenkov light.As a result,lead fluoride itself can function as a scintillator.[Purpose]Using a lead fluoride crystal as the optical window of a detector enables it to both generate and detect light.This optimizes the optical transmission and detection performance,shortens the conversion time from the reaction medium to photons,improves the detector's efficiency,and provides an experimental foundation for future applications in ultrafast detection.[Methods]After cleaning components such as the cathode input window,ceramic parts,and anode of the photomultiplier tube,a transition indium sealing film layer is deposited on the cathode input window.The ceramic and metal components are then sealed and assembled into a tube shell using a hydrogen furnace.Indium sealing solder is melted into the tube shell's indium sealing groove,and the tube shell is laser-welded to the anode.The processed tube shell,microchannel plate(MCP),and anode are assembled according to the designed structure.After assembly,the tube shell components and cathode window are mounted on a transfer-type cathode activation and exhaust station.Cathode activation and MCP electron scrubbing processes are then performed.Upon completion of these steps,the tube shell and cathode window are sealed together using indium sealing,resulting in the fabrication of a bare MCP-PMT.[Results]Two PbF2-window MCP-PMTs were successfully prepared,and their electrical performance,including quantum efficiency and operating voltage,was measured.[Conclusions]By integrating lead fluoride crystals,fast-time-response microchannel plates,and a fast-time coaxial conical anode,this study has successfully addressed key technical challenges in the preparation of lead fluoride crystals as the optical window for photomultiplier tubes.Post-fabrication performance tests indicate that core parameters such as quantum efficiency,gain,and rise time are generally comparable to those of conventional fast-time-response MCP-PMTs.关键词
超快响应/氟化铅/微通道板型/增益/上升时间Key words
ultrafast response/lead fluoride/microchannel plate type/gain/rise time分类
信息技术与安全科学引用本文复制引用
金真,赵敏,侯巍,李安然,孙建宁,王宁,李婧雯,王兴超,司曙光,吴凯,吴超,黄国瑞..氟化铅超快响应光电倍增管研制及性能研究[J].强激光与粒子束,2026,38(6):63-67,5.
