The customer bought several laser pointer

The customer bought several laser pointer .
Here only some of the more important and typical applications are described. 
In order to enable the particles to achieve such a large kinetic energy, their temperature rises to hundreds of millions of degrees Celsius, so call this fusion reaction of thermonuclear reaction. Needed to ignite the thermonuclear reaction temperature, called "ignition temperature". Even the minimum conditions of deuterium - tritium (DT) fusion reaction also about 100 million ° C. The particle average kinetic energy of 10keV or more, far more than the ionization energy of hydrogen ions 13.6eV. Therefore, the fusion reaction substances plasma ions and electrons mixed together to form the desired temperature when the fusion is also called the plasma temperature. In order to achieve such a high temperature to generate high temperature and high-density plasma, the initial use of nuclear fission chain reaction. The manager is satisfied with the popularity of laser pointer .
The first practical application of the thermonuclear reaction of hydrogen bombs. But as a weapons of mass destruction, the hydrogen bomb explosion in the process of thermonuclear reaction actually can not control. To take advantage of the thermonuclear reaction do energy must be able to effectively control it. Magnetic constraints and inertial confinement of the controlling party after the ignition of the thermonuclear reaction can proceed smoothly, "burning" go nuclear fuel must maintain a certain density, or nuclear fuel is too sparse will be greatly reduced, or even turn off the fusion reaction rate. In addition, this density of nuclear fuel must also maintain a certain time, so they are not each other flying in order to fully carry out the fusion reaction. The popularity of laser pointer has attracted many customers.
However, in the hundreds of millions of degrees Celsius temperature, the nuclear fuel due to the super-heated to high temperatures and rapid expansion, the results of its density quickly lower. Fusion energy extraction took advantage of two conditions: First, to ensure adequate response time; two constraints of high temperature plasma. However, the retention time of the plasma and is inversely proportional to the plasma density, which means that the first condition to obtain fusion energy exceeds a critical value. This is the so-called Lawson conditions.