flood gun การใช้

• Flood guns cover the entire screen, ideally uniformly.
• One way of allowing the image to be retained for longer is temporarily to turn off the flood gun.
• The other gun was a " flood gun " that sprayed the entire screen with low-energy electrons.
• This flood gun is not deflected like the main gun but constantly'illuminates'the whole of the storage mesh.
• If the sample is non-conductive, a low energy electron flood gun can be used to provide charge neutralization.
• This causes some of the electrons from the flood gun to be strongly attracted to that spot, which keeps it lit up.
• This mesh is constantly exposed to a low velocity electron beam from a'flood gun'which operates independently of the main gun.
• Turning off the flood gun and the voltage supply to the storage mesh allows such a tube to operate as a conventional oscilloscope tube.
• The initial charge on the storage mesh is such as to repel the electrons from the flood gun which are prevented from striking the phosphor screen.
• The areas where this relief is created no longer repel the electrons from the flood gun which now pass through the mesh and illuminate the phosphor screen.
• The time for which the image can be displayed was limited because, in practice, the flood gun slowly neutralises the charge on the storage mesh.
• One, the " flood gun ", provides a constant flow of low-energy electrons across the entire screen, causing it to glow slightly.
• Storage oscilloscopes then provide one or more secondary electron guns ( called the " flood guns " ) that provide a steady flood of low-energy electrons traveling towards the phosphor screen.
• If the energy of a flood gun's electrons is properly balanced, each impinging flood gun electron knocks out one secondary electron from the target, thus preserving the net charge in the target area.
• If the energy of a flood gun's electrons is properly balanced, each impinging flood gun electron knocks out one secondary electron from the target, thus preserving the net charge in the target area.
• If the energy of the flood gun electrons is properly balanced, each impinging flood gun electron knocks out one secondary electron from the phosphor screen, thus preserving the net positive charge in the illuminated areas of the phosphor screen.
• If the energy of the flood gun electrons is properly balanced, each impinging flood gun electron knocks out one secondary electron from the phosphor screen, thus preserving the net positive charge in the illuminated areas of the phosphor screen.
• When using a monochromatic XPS system together with a low voltage electron flood gun for charge compensation the experimental BEs of the C ( 1s ) hydrocarbon peak is often 4-5 eV smaller than the reference BE value ( 284.8 eV ).
• Storage means that the display, once written, will persist for several minutes . ( The CRT has at least one flood gun, and a special type of display screen, more complicated in principle than a simple phosphor . ) But that permanent image cannot be easily changed.
• The electrons from the flood guns are more strongly drawn to the areas of the phosphor screen where the writing gun has left a net positive charge; in this way, the electrons from the flood guns re-illuminate the phosphor in these positively charged areas of the phosphor screen.