X-ray Tube
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| List advantages of a rotating type anode | increased rte of heat dissipation from the surface of the anode, increase in allowable exposures, reduction in amount of roughening on the focal tract
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| temp of the filament is most closely related to the | current impressed on the filament (amperage)
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| speed and energy of the electron stream is primarily controlled by | the applied kilovoltage
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| the positively charged electrode that serves as the target for the electron stream is the | anode disk
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| mA ^, heat of filament ^, space charge ^, effective focal spot ^ | (blank)
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| if the angle on an x-ray is decreased from 12 degrees to 7 degrees it will result in a decrease in | size of the focal spot, loading capacity of the tube, and field coverage
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| a dual focus x-ray tube contains | 2 filaments and 1 anode
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| tungsten melting point | 3400 degrees celcius
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| the motion of the rotating disk is accomplished by the use of | an induction motor
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| charges of the anode and cathode | positive and negative
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| what happens in the first stage of exposure? | the filament is heated, the bucky begins to move and the anode rotation commences
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| what happens in the second stage of exposure? | high potential difference moves the electron cloud toward the anode
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| what is the purpose of the focusing cup? | to compress and focus the electron cloud created around the filament
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| what happens to beam quality and what kinds of wavelength results from a decrease in kVp? | decrease in quality of the beam and shorter wavelengths
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| common indiction of a gassy x-ray tube | fluctuations in mA readings
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