Application of a fast electrical pulse in gated multichannel plate camera.
An eight-frame gated microchannel plate (MCP) camera and a gating electrical pulse are described in this article. The gating electrical pulse is obtained by first generating a high voltage fast step pulse using avalanche transistors in Marx bank configuration, and then shaping it using avalanche diodes. The high voltage fast step pulse is about 200 ps in fall time and 4 kV in amplitude. The gating pulse wave form with width of 160 ps and amplitude of 2.5 kV is achieved. Each frame photocathode coated with gold on the MCP is part of a 12 Omega transmission line with open circuit end driven by the gating electrical pulse. The camera is tested by illuminating its photocathode with ultraviolet laser pulses, 266 nm in wavelength, which shows exposure time as short as 120 ps.
Liu
Jinyuan
J
Institute of Optoelectronics, Shenzhen University, Guangdong 518060, China. ljy@szu.edu.cn
Niu
Lihong
L
Peng
Wenda
W
Zhang
Fengxia
F
Li
Li
L
Ou
Junfu
J
Yuan
Huatao
H
Yang
Qinlao
Q
Niu
Hanben
H
Long
Jinghua
J
D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D011856:Radiographic Image Enhancement / Q000295:instrumentation* / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*