A fiber coupled streak camera is developed and applied in Z-pinch experiments to investigate the optical trajectory of wire-array implosions with one-dimensional (1D) spatial resolution of 100μ~400μ. The 1D image of the imploding plasma is formed by a slit and relayed to a linearly arranged fiber array, which is capable of transmitting the 1D image out from within the vacuum chamber. A mylar film is setup before the fiber array to absorb the X-ray light while transmitting visible light into the fibers, which are coupled to a streak camera. And for X-ray diagnosis the mylar film is substituted by an infra scinllator, which converts X-ray into visible light and relays it into the fiber array. The experiments were performed on QiangGuang-1 facility. With the slit parallel to the axis of the wire array, optical measurement of time-resolved radial distribution of the imploding plasma is carried out as well as diagnosis of X-ray implosion dynamics. The 1D optical trajectory (radius versus implosion time) of imploding plasma is obtained. And some discussions of the experiments are also presented in this letter.
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