电子束时间展宽技术及其应用OA

[Background]Inertial confinement fusion(ICF)diagnostics demand ultra-high temporal resolution to accurately capture critical physical processes.However,the performance of conventional diagnostic devices is often limited by their inherent time-resolution capabilities.[Purpose]This study aims to improve the temporal resolution of ICF diagnostic systems by investigating electron pulse time-dilation technology and its practical applications in X-ray detection.[Methods]We developed a time-dilation X-ray framing camera and a time-dilation X-ray diode system.The technology manipulates the velocity dispersion of photoelectrons to stretch(or magnify)the time width of input optical signals,allowing conventional devices to sample ultra-fast events with enhanced precision.Both short and long magnetic lens imaging techniques were employed to optimize spatial resolution.[Results]The time-dilation technology significantly improves system performance.For the framing camera,temporal resolution was improved from 80 ps to 5 ps.Using short magnetic lenses,the camera achieved a spatial resolution better than 10 lp/mm over a 53 mm diameter;this was further enhanced to 20 lp/mm using long magnetic lenses.For the X-ray diode system,temporal resolution was improved from 261 ps to 19 ps.[Conclusions]Electron pulse time-dilation technology is a highly effective method for enhancing the temporal resolution of ICF diagnostic instruments,providing robust support for the accurate diagnosis of rapid physical phenomena in fusion experiments.