On-line Monitoring Method of Intense Laser Focus Spot Uniformity
A uniform and strong laser technology, applied in the field of strong laser, can solve the problems of the on-line monitoring method of the uniformity of the non-focal spot, the research cannot be carried out smoothly, etc., and achieve the effect of accurate and reliable monitoring results.
Active Publication Date: 2020-05-15
CHINA INSTITUTE OF ATOMIC ENERGY
View PDF14 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the problem that the existing large-scale laser system for inertial confinement nuclear fusion "ignition" does not have an online monitoring method for the uniformity of the focal spot, resulting in the problem that the research on key technologies cannot be carried out smoothly, the invention provides a strong laser focal spot uniformity On-line monitoring method
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0025] The method for on-line monitoring of the uniformity of the strong laser focal spot of the present invention is applied to the on-line monitoring of the largest high-power KrF excimer laser system in my country - "Tianguang No. 1". The targeting optical path of "Tianguang-1" consists of six strong laser beams with a wavelength of 248nm. The optical system of the targeting optical path includes six concave mirrors and six focusing lenses. The main steps of its online monitoring are as follows:
[0026] (1) A wedge-shaped beam splitter is arranged in each path of the front end of the target optical path, and each wedge-shaped beam splitter 1 is a fused silica beam splitter coated with an anti-reflection film on both sides, and the optical properties are all the same;
[0027] (2) Installing a monitoring optical system that is exactly the same as the optical system used in the targeting optical path;
[0028] (3) By adjusting the orientation of the monitoring optical syste...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the field of intensive laser. The present invention provides an intensive laser focal spot uniformity online monitoring method in order to solve the problem that the conventional large-scale laser beam system for inertial confinement fusion "ignition" has no focal spot uniformity online monitoring method. The method comprises the following steps of (1) setting the wedge beam splitter; (2) setting the monitoring optical system; (3) separating the monitoring optical path; (4) setting the CCD image sensor and the data processing system; (5) setting the first attenuation slice and roughly adjusting the optical path; (6) accurately adjusting the monitoring optical path; (7) switching to the second attenuation slice; (8) performing online monitoring. The online monitoring method provided by the invention achieves the focal spot uniformity online monitoring of the large-scale laser beam system for inertial confinement fusion "ignition", is accurate and reliable in monitoring result proven by the practical application, and provides reliable guarantee for research on key technologies of the large-scale laser beam system for inertial confinement fusion "ignition".
Description
technical field [0001] The invention belongs to the field of strong lasers, and in particular relates to an online monitoring method for the uniformity of a strong laser focal spot. Background technique [0002] In the 1960s, famous Chinese scientists such as Wang Ganchang proposed the concept of using lasers to drive inertial confinement fusion. In the late 1980s, the United States successfully drove inertial confinement fusion with radiation energy from underground nuclear explosions, proving the feasibility of inertial confinement fusion. Since the 1990s, some countries, including my country, have built megajoule-class large-scale laser systems with "ignition" as the research goal, such as the Shenguang series of lasers built by Shanghai Institute of Optics and Mechanics and China Academy of Engineering Physics system, the China Institute of Atomic Energy built the Tianguang-1 laser system, etc. [0003] A large-scale laser system used for "ignition" of inertial confinem...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 李静高智星胡凤明陆泽
Owner CHINA INSTITUTE OF ATOMIC ENERGY