An ultrafast framing camera with a pulse-dilation device,a microchannel plate(MCP)imager,and an electronic imaging system were reported.The camera achieved a temporal resolution of 10 ps by using a pulse-dilation devi...An ultrafast framing camera with a pulse-dilation device,a microchannel plate(MCP)imager,and an electronic imaging system were reported.The camera achieved a temporal resolution of 10 ps by using a pulse-dilation device and gated MCP imager,and a spatial resolution of 100μm by using an electronic imaging system comprising combined magnetic lenses.The spatial resolution characteristics of the camera were studied both theoretically and experimentally.The results showed that the camera with combined magnetic lenses reduced the field curvature and acquired a larger working area.A working area with a diameter of 53 mm was created by applying four magnetic lenses to the camera.Furthermore,the camera was used to detect the X-rays produced by the laser-targeting device.The diagnostic results indicated that the width of the X-ray pulse was approximately 18 ps.展开更多
A dilation X-ray detector(DIXD)based on time dilation and microchannel plate(MCP)gated technology has been reported.The DIXD passes a driving pulse along the transmission photocathode(PC)to obtain a dilated electron s...A dilation X-ray detector(DIXD)based on time dilation and microchannel plate(MCP)gated technology has been reported.The DIXD passes a driving pulse along the transmission photocathode(PC)to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps.Furthermore,the waveform of the PC driving pulse can be obtained using the DIXD,and a DIXD oscillographic function can be obtained.An experiment is presented to demonstrate the DIXD oscilloscope.The waveform of the PC driving pulse from points t_(1) to t_(12) is achieved by the DIXD.The waveform agrees well with that measured by a high-speed oscilloscope with a difference of less than 6%.The maximum theoretical bandwidth of the DIXD oscilloscope is theoretically studied.The bandwidth is limited by the potential difference between the PC and mesh.When the potential difference is 3.4 kV,the theoretical limiting bandwidth is 1000 GHz.The bandwidth increases with an increase in the potential difference.展开更多
基金National Natural Science Foundation of China(NSFC)(No.11775147)Guangdong Basic and Applied Basic Research Foundation(Nos.2019A1515110130 and 2024A1515011832)+1 种基金Shenzhen Key Laboratory of Photonics and Biophotonics(ZDSYS20210623092006020)Shenzhen Science and Technology Program(Nos.JCYJ20210324095007020,JCYJ20200109105201936 and JCYJ20230808105019039).
文摘An ultrafast framing camera with a pulse-dilation device,a microchannel plate(MCP)imager,and an electronic imaging system were reported.The camera achieved a temporal resolution of 10 ps by using a pulse-dilation device and gated MCP imager,and a spatial resolution of 100μm by using an electronic imaging system comprising combined magnetic lenses.The spatial resolution characteristics of the camera were studied both theoretically and experimentally.The results showed that the camera with combined magnetic lenses reduced the field curvature and acquired a larger working area.A working area with a diameter of 53 mm was created by applying four magnetic lenses to the camera.Furthermore,the camera was used to detect the X-rays produced by the laser-targeting device.The diagnostic results indicated that the width of the X-ray pulse was approximately 18 ps.
基金supported by the Program for National Natural Science Foundation of China(NSFC)(11775147)Guangdong Basic and Applied Basic Research Foundation(Nos.2019A1515011474 and2019A1515110130)Shenzhen Science and Technology Program(Nos.JCYJ20210324095007020,JCYJ20200109105201936,and JCYJ20190808115605501)。
文摘A dilation X-ray detector(DIXD)based on time dilation and microchannel plate(MCP)gated technology has been reported.The DIXD passes a driving pulse along the transmission photocathode(PC)to obtain a dilated electron signal and finally achieves a high time resolution of 12 ps.Furthermore,the waveform of the PC driving pulse can be obtained using the DIXD,and a DIXD oscillographic function can be obtained.An experiment is presented to demonstrate the DIXD oscilloscope.The waveform of the PC driving pulse from points t_(1) to t_(12) is achieved by the DIXD.The waveform agrees well with that measured by a high-speed oscilloscope with a difference of less than 6%.The maximum theoretical bandwidth of the DIXD oscilloscope is theoretically studied.The bandwidth is limited by the potential difference between the PC and mesh.When the potential difference is 3.4 kV,the theoretical limiting bandwidth is 1000 GHz.The bandwidth increases with an increase in the potential difference.
