In the development of the Shenguang II device, the development of the laser light path automatic collimation system has been highly valued. After learning and absorbing the mature experience at home and abroad, Chen Qinghao is responsible for the collimation subject, and in accordance with the requirements of the Shenguang II device, innovated “dynamic correction in the optical path automatic collimation system, black and white alignment correction, small step iteration adjustment technology” . Therefore, the automatic collimation time of the eight beam laser pointer system only takes 15 minutes, and the accuracy of automatic positioning by the computer is also much better than that of human positioning. It has made important contributions to the efficient and stable operation of the Shenguang II device for 15 years.
The design goal of the Shenguang II integrated device centralized control system is to achieve a high degree of automation and electronic management of device operation, to improve the efficiency and level of device operation in all directions, and to better serve customers’ needs for physical experiments. The centralized control system needs to integrate the sub-systems of the Shenguang II integrated device to complete the data collection, analysis, management, control and monitoring functions required for device operation and maintenance, so as to realize the mixed operation of new and old devices under the same network system.
The main research and development contents of the centralized control system are: the development of energy terminal control system, the addition of green laser pointer parameter collection and storage, the remote control management of the synchronization unit, the realization of remote modification of synchronization parameters and the synchronization parameter storage and management of each experiment The expansion and design of the information system, the expansion design of the database system, on the basis of perfecting the terminal control software of each sub-system, the development of the central control software system is carried out to develop the general control room of the Shenguang comprehensive device.
With the continuous development of automation control technology and the rapid progress of computer technology, the new fully integrated automation will use one system to complete all the functions that can only be completed by a combination of multiple systems. Application of this solution can greatly simplify the structure of the system, reduce a large number of interface components, and overcome the boundaries between the host computer and the industrial controller, between continuous control and logical control, and between centralized and decentralized. At the same time, the fully integrated automation solution can also provide a unified technical environment for all automation applications, mainly including: unified data processing, unified communication methods, unified configuration and programming software and software quality control. In the end, several operators will command and control the system in the general control room to realize the normal operation of the entire device.
In the Φ300mm large-caliber energy meter developed for the Shenguang II device, neutral ion stained glass with sufficient absorption depth is used as the absorber, which improves the energy and power load density of the receiver; a new type of semiconductor thermoelectric conversion element is used to improve The responsivity of the energy meter is improved; at the same time, the paired design of the thermopile differential structure and the double-layer thermal shielding isolation measures are adopted to solve the two major contradictions between the sensitivity and uniformity of the large-caliber energy meter and the sensitivity and stability. The large-diameter red laser pointer energy meter has excellent performance, and its sensitivity is two orders of magnitude higher than the sensitivity of the same type of laser energy meter developed by Livermore National Laboratory in the United States.