The main function of the electron gun is to emit the electrons to form them into a ray. Thus, it can amplify the signal to a level that will be provided the deflection of the electron beam. The signals are passed from the vertical deflection plate through the vertical amplifier. Just before detecting the electron beam on the screen in the horizontal direction which is in X-axis a constant time-dependent rate, a time base generator is given by the oscillator. The horizontal and vertical plates are placed between the electron gun and the screen, thus it can detect the beam according to the input signal. The normal voltage supply is necessary for other control units of the oscilloscope. A high voltage is required for the cathode ray tube to speed up the beam. The low voltage is used for the heater of the electron gun to generate the electron beam. Here we will use high voltage and low voltage. This provides the power supply circuit of the oscilloscope. To complete this task we need various electrical signals and voltages. By detecting the beam above the screen in reply to the electrical signal, the electrons can act as an electrical pencil of light which produces a light where it strikes. The Health Physics Society 1313 Dolley Madison Blvd.Thus, the screen produces a visible spot where the electron beam strikes with it. Thanks to the following group for allowing us to reprint this information: In 1975, with 83 patents to his credit, William David Coolidge was elected to the National Inventor's Hall of Fame, the only person to receive this honor in his lifetime. This committee's report led to the establishment of the Manhattan District for nuclear weapons development. At the beginning of WW II, he was appointed to a small committee established to evaluate the military importance of research on uranium. Coolidge later became Director of the laboratory and eventually Vice-President and Director of Research for General Electric. In addition, the intensity of the X rays didn't show the tremendous fluctuations characteristic of earlier tubes and the operator had much greater control over the quality (i.e., energy) of the X rays. These higher voltages produced higher energy X rays which were more effective in the treatment of deep-seated tumors. Since residual gas molecules in the tube were no longer necessary as the electron source, the Coolidge (or hot cathode) tube could be completely evacuated which permitted higher operating voltages. Coolidge's improved X-ray tube employed a heated tungsten filament as its source of electrons (i.e., the cathode). General Electric also manufactured X-ray tubes and Coolidge recognized that his tungsten filament together with additional modifications could significantly improve the performance of the tube. The available tungsten was difficult to work metallurgically, but Coolidge succeeded and his improved light bulb was brought to market in 1911. The story of its development began in 1905 when Coolidge joined the General Electric Research Laboratory and was given the task of replacing the fragile carbon filaments in electric light bulbs with tungsten filaments. Nevertheless, this new product became a watershed in the field of medicine. No new scientific principles or discoveries were involved, and to Coolidge's employer, the General Electric Company, the invention simply represented a new product. In 1913, William David Coolidge revolutionized the field of radiology by inventing what is now referred to as the Coolidge X-ray tube.
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