The worker is cleaning the storage area of finished green laser pointer

The worker is cleaning the storage area of finished green laser pointer
As we all know, any movement of objects in the gas excitation waves in gases, if the object's movement faster than sound waves, sound waves then the distance between the front and will continue to shrink, during which the gas is constantly being compressed and therefore lead to temperature, density, pressure is increasing. After full compression distance, between the object and the sound of the gas front has been compressed to the greatest extent can no longer be compressed, then the movement of objects depends on the speed and sound speed ratio and the Mach number and the nature of the gas (adiabatic index ), the temperature of the gas is compressed up to thousands of degrees, the density of compressed gas increased several times than not, a corresponding surge in pressure. Safety of green laser pointer workshop is in the first place.
In the acoustic front at the gas temperature, density, then suddenly dropped to the level of uncompressed gas to form a cross-section between the gas state. This discontinuity is called the shock wave (shock wave). This will form in the PLD process. Whenever the laser pulse ends, the speed up to 105-106cm / s and density up to 1018-1021cm-3 ablation material is starting to grow rapidly compressed gas atmosphere, the result is the preparation of oxides in typical conditions, away from the target 1 - 2cm position to form a strong shock wave. Once the shock wave formation in the gas atmosphere of independent transmission. Figure 5-3 shows the shock structure. The shock front between the ablation material density, temperature and pressure increase in the mutation region, and its thickness is about a growing atmosphere of the gas molecule mean free path (micron order of magnitude). Shock wave formation in the temperature region up to 2 ? 104K, close to the ablated material is thin. The delivery period of green laser pointer is stipulated in the agreement.
Thin layer of shock wave transmission up to thousands of degrees of heat. O2, for example the most commonly used, which means that one of the O2 molecules will be excited, as well as ionization and dissociation to atomic oxygen, oxygen ions and other chemical lively state of existence. Ablation from the target material next to the region in which the metal element can be easily and the chemical activity of chemical reaction with oxygen. With the spread continues, the shock will be less and less, until finally decay into sound waves, gas-phase chemical reaction will not happen again. Usually a significant gas-phase chemical reactions take place after the formation of the shock wave within the range of about 5mm. Into the sound stage, ablative material is basically the rate of loss of directional movement under gravity and into the thermal diffusion stage. The company emphasizes the advantage of green laser pointer price.