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Since its establishment in 2010, Dandong Tongda Science & Technology Co., Ltd. has been focusing on the research, development, and production of X-ray analytical instruments and non-destructive testing equipment.The company has accumulated extensive experience in X-ray technology. In 2013, it became the undertaking unit of the "National Major Scientific Instrument and Equipment Development Project" for the X-ray single crystal diffractometer, supported by the Ministry of Science and Technology of China. The Cryostream low-temperature liquid nitrogen cooling system, launched by Dandong Tongda Science & Technology, is a representative product of its Medium-low temperature accessory.This system is specifically designed for scientific experiments requiring precise low-temperature environments and integrates multiple advanced technologies. Precise temperature control is the core advantage of the system. The Medium-low temperature accessory can maintain a temperature stability of up to 0.3 K within the standard temperature range of 100–300 K.Such high temperature stability provides a reliable environment for scientific experiments, ensuring the accuracy and reproducibility of experimental data. Efficient cooling performance is another highlight. The system requires only 35 minutes to cool from room temperature to 100 K.The rapid cooling speed significantly enhances the work efficiency of researchers, making it particularly suitable for experimental scenarios requiring frequent temperature changes. ​ The intelligent control system makes operation more straightforward. Utilizing a fuzzy PID temperature control algorithm, the system achieves accurate and stable real-time control of low-temperature nitrogen gas temperature.This intelligent control approach greatly reduces the operational complexity, allowing researchers to focus more on the experiments themselves rather than equipment adjustments.

Mating sterile male mosquitoes with wild female mosquitoes can prevent mosquito eggs from hatching or larvae from developing, which can control mosquito populations. The technique of insect sterility was developed by two entomologists in the 1950s. Firstly, pest larvae were treated with radioactive radiation to select sterile male insects. Then, a large number of treated male insects were released and mated with wild female insects, preventing them from producing offspring normally and achieving the goal of controlling pest populations. Researchers successfully eliminated the green headed flies on the island by releasing male flies that were sterilized by irradiation. Another field release experiment was conducted on a 460 square kilometer island, achieving fly purification in just 7 weeks. Afterwards, this technology was widely adopted in many countries and regions around the world, successfully eliminating green headed flies.

The Cryostream Low Temperature Liquid Nitrogen Cooling System (TD-100) used in single crystal X-ray diffractometers offers a range of features, from highly stable and precise temperature control to fast cooling times and integrated automatic filling capabilities. Each iteration of Cryostream expands the list of available functions. It combines elegant design, emphasizing reliability, simplicity, and ease of use. The latest version of the open flow low-temperature gas cooler integrates the controller, pump, and dry air unit into one gas supply module. This minimizes the overall system footprint, simplifies wiring and installation, and improves user experience.

X-ray diffractometer is mainly used for phase qualitative and quantitative analysis, crystal structure analysis, material structure analysis, crystal orientation analysis, macroscopic or microscopic stress determination, grain size determination, crystallinity determination, etc. of powder, block or film samples.

The three-dimensional space of atoms is arranged in a long-range order, and the smallest unit of repeated arrangement is called the cell, which can be divided into 7 kinds of crystal systems, 14 kinds of lattice, and 230 kinds of space groups according to the arrangement law.

X-ray diffraction (XRD) is a means of research to obtain information such as the composition of a material, the structure or form of an internal atom or molecule by analyzing its diffraction pattern through X-ray diffraction.