It is about the use and maintenance safety and security

It is about the use and maintenance safety and security of green laser pointer . 
When the electrons in the magnetic field within the arc movement due to the centripetal acceleration will be along the tangential direction of the orbital radiation electromagnetic waves. This chapter describes the basic principles of the free-electron laser. The electromagnetic waves emitted by point to the Z direction under certain conditions can have the same phase (ie coherent light) and from the electron beam energy to electromagnetic energy to run around to increase (stimulated to enlarge). By the total reflection mirror and semi-reflective semi-lens form a resonant cavity, so that part of the electromagnetic radiation from the movement by repeated amplification, and from the semi-reflective lens output. Here we analyze the principles and conditions of a free-electron laser. Figure (3) planar undulator swing magnetic field diagram. Set the periodic changes in magnetic field along the z-axis direction, the magnetic field along the y axis direction. The manufacturer should provide the specific suggestion of green laser pointer .However, in the wiggler, due to its magnetic field strength than the bending magnet of the magnetic field, so the track is also a great degree of bending, electronics each time emits radiation in all directions after the first bend the same orbit as, after N bend turn, the radiation intensity in all directions will be equal to N times the superposition of the wiggler light intensity is increased by N times. Undulator and the wiggler in the structure is similar, but the main difference with the wiggler is: its magnetic field is relatively weak (lower than the magnetic field of the bending magnet), a very short cycle length (ie, the magnet is very small), and the periodic array (N value of about tens to hundreds). Electrons in the fluctuations in the trajectory can be approximated as a sine curve, but the amplitude is small, like tiny waves. Actually, the appropriate use and maintenance of green laser pointer can enlarge the life time.
Any procedure, operation and process of green laser pointer should be described
In addition, the magnetic field of the undulator wiggler much weaker. Therefore, the orbit bending, and the corresponding changes in the track direction is also very small. Thus, the charged particles in the undulator orbit issued radiation is largely concentrated in a small solid angle. So that the light in the same direction, but under certain conditions, these lights can be a coherent superposition, and thus the brightness of the light will be greatly improved, thousands of times as shown in Figure (2) than the improvement in the wiggler.