As a representative material among ultra-wide bandgap (UWBG) semiconductor materials, β-Ga2O3 is a natural intrinsic absorption material for preparing solar-blind detectors due to its availability of large-area single wafers, high transparency to visible light, and excellent stability. However, the molecular beam epitaxial growth mechanism of β-Ga2O3 is still unclear, especially the effect of oxygen precursors on the growth mechanism of β-Ga2O3 has not been disclosed, which is important for the

Femian Instruments' Active Gas Purifiers (AGP) air purification technology uses nanotechnology to achieve stable and silent ionization below the corona discharge threshold, forming a plasma active inactivation zone, perfectly reproducing nature's air ionization purification process.

Fermion Instruments has developed a new generation of remote plasma cleaning source, which eliminates the internal electrode design of the cavity, making it safer and more convenient. The system is suitable for ultra-high vacuum working environment, and other vacuum components do not need to be removed during the working process, and subsequent baking can be performed without removing the cleaning source, so that the vacuum system can maintain a good vacuum degree for a longer period of time.

29. Why do we conduct ARPES experiments in low temperature environments? 30. Why does the ARPES cavity need magnetic shielding? 31. Why can't the ARPES sample holder head parts (such as the sample stage) be completely insulated?

26. What are the differences between the various heating methods for the sample stage (infrared, resistance heating wire)? 27. What is the working principle of the laser heater? And how to calculate the output power of the laser heater commonly used by the company? 28. How does the He mass spectrometer in the leak detector work? What is the difference with the commonly used SRS mass spectrometer?

23. Is there any connection between the thermal conductivity and specific heat capacity of a material? For example, a material with good thermal conductivity generally has a smaller specific heat capacity? 24. What is the working principle of a PBN heater? What material is the insulating layer made of? 25. What are the performance differences and selection criteria between PBN and alumina?

20. Classification and usage environment of copper washers? 21. What is the difference between bevel seal copper washers and ordinary knife-edge copper washers? 22. If new bevel seals are used in the future, will the old knife-edge seals be completely eliminated?

19. How does an infrared thermometer work? What does the object distance ratio mean? Will the temperature measured by infrared thermometer be different for different materials at the same temperature?

16. How to choose vacuum screws? 17. Why do screws used in blind holes need to have vent holes? 18. Can pure aluminum be used for metal sealing gaskets?

13. What are the differences and selections of UHV-24, FRG, and WRG gauges? 14. When the temperature is determined and the environment inside the vacuum chamber is the same, can the magnetic field strength inside the chamber affect the vacuum index inside the chamber? What about noise (ultrasound and infrasound)? 15. What is the purpose and function of the system Vent?

10. Why can't the ion pump be turned on under rough vacuum? 11. Can the vacuum degree be improved by coating a layer of adsorbent material on the inner surface of the vacuum chamber? 12. What is the purpose of NEG pump activation?

7. What is the ultimate vacuum that various materials can achieve? 8. What are the commonly used vacuum metal and non-metal materials, and how to choose them? 9. Why is molybdenum disulfide applied to the meshing parts of the sample rack gears? Does it have any effect on the vacuum?