【摘要】 本文报道的超高速摄影机可在１．２ｎｓ内连续拍摄１２幅图象，每幅图象的曝光时间为１００ｐｓ，空间分辨率２０１ｐ／ｍｍ，它具有几何畸变小、动态范围大等特点。对ＭＣＰ皮秒选通的数值模拟考虑了电子渡越时间及弥散影响。变象管研制着重解决了微通道板上微带线的欧姆损耗问题。更多还原

【Abstract】 The technology of gating MCP in image intensifier with picosecond high voltage pulse forultrahigh speed photography has been developed in our group since 1 9 8 7.The voltage pulse wasgenerated by using GaAs photoswitch at that time. Great progress has been made since last year,which is reported in this paper,Our new camera consists of a special proximity focused MCP imagerand a high voltage pulse generator. The picosecond high voltage pulse is generated by a sharpeningdiode circuit that is driven by a high voltage step pulse,A meander shape infinity-ground microstripline was formed by speccial method on the input surface of the MCP and the rear face of the MCP that is coated with conducting metal layer,such configuration was used to reduce the ohmic loss ofmicrostrip line on the MCP.The MCP is 2 6 mm in diameter and 0 5 mm in thickness,The channeldiameter is 1 2.5μm. The fiber-optic face plate is coated with P 2 0 phosphor screen.The imageis recorded in a film contacting the face plate. The gain characteristics of the MCP gated bypicosecond pulse were simulated taking into account the effect of the electron transit timedispersion,The static spatial resolution of the camera is 2 0 1 p mm when the phosphor screenis applied with 3 kV voltage and the measured temporal resolution is～10 0 ps,By using themeander microstrip line configuration,up to 1 2 frame images were gated by a single voltagepulse.The camera has been used for diagnosis of plasma produced by 1 kJ laser beams andworked well.;Microchannel plcqte(MCP)Prof.更多还原