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1. The principle of two-stage light gas gun, its driver gas and test facilities are expounded.

2. Two stage light gas gun is one of the important devices to simulate hypervelocity impact of space debris.

3. Gas gun adopts stainless steel full closed structure, fit for long-term application under worse weather conditions, and convenient for installation and maintenance.

4. Using a gas gun, a set of plate impact experiments were performed for 20 steel by measuring the rear free-surface velocity profiles with a velocity interferometer system for any reflector (VISAR).

5. In order to simulate and study the high-velocity impact of space debris on Aluminum dual-wall structure of spacecrafts, a non-powder two-stage light gas gun was used to launch Al-sphere projectiles.

6. The dynamic mechanical behaviors of cement mortar under quasi one and one dimensional strain states are studied by using an improved passive confining SHPB method and one stage gas gun respectively.

7. Experiments were carried out with a 101 mm bore single - stage light gas gun.

8. Based on the principle and the characteristics of the gas-gun, the mathematical model of the interior ballistic is constructed and the practical interior ballistic equations of gas gun are derived.

9. Shock initiation behavior of explosive JB9014 was experimentally studied by means of one stage gas gun.

10. Studies on the spallation behaviour for 93 tungsten alloy have been performed witha compressed gas gun and a manganin piezoresistance gauge technique.

11. Shock behavior of silicon nitride ceramic was investigated by using a one - stage light gas gun facility.

12. To solve the problem of sabot separation in experiments using light gas gun with short target chamber(sentence dictionary), a new type of sabot and its separation device were designed.

13. A kind of model based on neural networks is adopted to obtain test sample data with the help of BP algorithm and the maximum bore pressure of the gas gun can be predicted.

14. The behaviour of shock compression of the mixture of carbon and water is studied by means of loading technique of two stage light gas gun.

15. This paper describes in detail the technology used in the separation of projectile from its seat in the hypervelocity impact study on the two-stage light gas gun.

16. A numerical method for simulating launch process of two - stage light - gas gun is established.

17. It is possible to launch each set or assembly of gas gun immediately or delayed time through remote control device and program control device.

18. The launching technique to enhance the projectile velocities of a two-stage light gas gun was studied in this paper.

19. A laser system for measuring the projectile velocity in gas gun is developed.