Temporal-spatial resolution radiant flux diagnosis system

Abstract

The invention provides a temporal-spatial resolution radiant flux diagnosis system, which is used for conducting precise diagnosis on the temporal and spatial evolution process of an X-ray radiant flux in a hohlraum. The hohlraum emits X-rays which undergo imaging by means of a pinhole in a pinhole plate, a portion of the X-rays is imaged onto an imaging plate; the other portion of the X-ray passes through a slit I in the imaging plate and then passes through a slit II in a time resolution plate to irradiate on an X-ray photocathode, further passes through a streak camera focusing deflection system and is recorded in a streak camera. According to the recorded signal, the temporal and spatial evolution process of the X-ray radiant flux emitted at a specified position of the hohlraum can be obtained. The temporal-spatial resolution radiant flux diagnosis system has time resolution with picosecond magnitude and temporal resolution with dozens of micrometer magnitude, and has wide application prospect.

Description

technical field [0001] The invention belongs to the field of laser fusion research and the field of X-ray detection, in particular to a time-space resolution radiation flow diagnosis system. Background technique [0002] In laser fusion research, the detection of black cavity radiation flow is very important research content. Through the diagnosis of the radiation flow, important information such as the coupling efficiency between the laser cavity target, the plasma density, and the temperature can be obtained. However, with the development of laser fusion research, further high-precision diagnosis of the spatiotemporal evolution of the radiation flow in the spot area, non-spot area, and target capsule in the black cavity is required. This is very important for the further understanding of the interaction between the laser cavity target, the verification of theoretical models and programs, and the final realization of fusion ignition. [0003] Typically, the detection of r...

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Problems solved by technology

[0003] Typically, the detection of radiation streams is performed using a soft X-ray multi-channel energy spectrometer (Dante) [E. L. Dewald, K. M. Campbell, R. E. Turner, et al. Rev. Sci. Instrum. 75, 3759 (2004).] Peace Response X-ray detector (F-XRD) [Zhichao Li, Xiaohua Jiang, Shenye Liu, et al.Rev.Sci.Instrum. 81, 073504 (2010).], but these systems have no spatial resolution and can only detect the radiation inside the black cavity The total amount of the flow, the radiation flow at different positions in the black cavity cannot be detected separately, and the time resolution can only reach 100 picoseconds at the highest

Later, the limited pore type F-XRD [Kuan Ren, Shenye Liu, Huabing Du, et al. Rev. Sci. Instrum. 86, 103112 (2015).] was developed. This diagnostic system uses the method of adding limited pores to observe a certain Radiation flow in a fixed area, there is still no way to diagnose the spatial variation process of radiation flow

In addition, because it still uses F-XRD as the signal recording device, the time resolution is still only up to hundreds of picoseconds

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