Device and method for generating femtosecond time-resolved X-ray source

Abstract

The invention provides a device for generating a femtosecond time-resolved X-ray source, comprising a femtosecond laser, a reflector, a focusing optical element as well as a target material and an ultrasound gas nozzle in a vacuum target chamber, wherein the femtosecond laser is used for outputting laser pulses with the pulse widths at the order of femtosecond and the contrast ratio of lasers is between 10-9 and 10-8; the focusing optical element is used for receiving the laser pulses and navigating the laser pulses to the focusing area of the focusing optical element, and the average strength of lasers in the focusing area is at least 5*10<16>W / cm<2>; and the target material is changed to a cluster through the ultrasound gas nozzle, and interacts with the laser pulses in the focusing area to generate femtosecond X-rays, and a gas is an inert gas. The device is simple in operation, and the formed ultrafast single-color hard X-ray source can help the application of X-rays driven by a single laser in the femtosecond time resolution become possible.

Description

technical field [0001] The invention relates to the field of X-ray sources, in particular to a device and method for generating femtosecond-level time-resolved X-ray sources. Background technique [0002] With the continuous progress and development of science and technology, X-ray technology has been widely used in many fields. In the past, X-ray sources can be generated by equipment such as synchrotron radiation sources and X-ray tubes. For example, synchrotron radiation sources have been proved to be applicable to various scientific researches. However, due to their huge equipment, relatively long pulse time characteristics and polychromaticity , has great limitations in practical applications, and the X-ray tube is a continuous X-ray source, which cannot be used for time-resolved applications and measurements. In recent years, the hard X-rays radiated from the plasma generated by femtosecond lasers have been extensively studied. This ultra-intense and ultra-short hard X...

AI Technical Summary

Problems solved by technology

However, at present, the disadvantage of this laser-driven hard X-ray source is that the time resolution of the femtosecond level cannot be achieved, so it is impossible to achieve ultra-fast time detection at the atomic and molecular level, which greatly limits its application in the imaging field.

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