Development of an all-optical framing camera and its application on the Z-pinch

Abstract

An all-optical framing camera has been developed which measures the spatial profile of photons flux by utilizing a laser beam to probe the refractive index change in an indium phosphide semiconductor. This framing camera acquires two frames with the time resolution of about 1.5 ns and the inter frame separation time of about 13 ns by angularly multiplexing the probe beam on to the semiconductor. The spatial resolution of this camera has been estimated to be about 140 μm and the spectral response of this camera has also been theoretically investigated in 5 eV-100 KeV range. This camera has been applied in investigating the imploding dynamics of the molybdenum planar wire array Z-pinch on the 1-MA "QiangGuang-1" facility. This framing camera can provide an alternative scheme for high energy density physics experiments.

Diagnosing X-pinch and cylindrical wire array Z-pinch with an all-optical framing camera on the “QiangGuang-I” facility

“…Though this technique has extraordinary imaging characteristics, applications of this approach have rarely been reported. In our previous work, an all-optical framing camera based on Indium Phosphide (InP) semiconductor was developed, tested and preliminarily applied in investigating the imploding dynamics of the molybdenum planar wire array Z-pinch [6]. In this article, applications for investigating the X-pinch and cylindrical wire array Z-pinch on the 1-MA "QiangGuang-I" facility with this imaging technique has been carried out.…”

“…The optical wedge was used to spatially shift one frame image on the CCD film. The spatial resolution of this imaging system is mainly determined by the InP imaging sensor, which was experimentally evaluated to be about 140 μm in our previous work [6].…”