X-Ray Tube Functionality and Concepts

X-ray tubes are used in medical and testing applications, producing x-rays through a basic mechanism involving a cathode emitter and an anode target. Electrons are accelerated between these components, focusing on a target to produce x-rays. Two main interactions occur: bremmstrahlung radiation, which has a continuous spectrum, and characteristic x-ray emission, which results from electron transitions in target atoms. The x-ray spectrum can be analyzed by plotting photon energy, showing a continuum and characteristic spikes. Increasing the potential difference enhances x-ray energy and intensity.

What are the two essential components inside an x-ray tube?

• Cathode emitter and anode target

• Cathode emitter and filament

• Anode target and filament

• Glass envelope and filament

How is the cathode emitter heated in an x-ray tube?

• By a high voltage supply

• By a low voltage supply

• By a magnetic field

• By a chemical reaction

What is the purpose of shaping the cathode in an x-ray tube?

• To cool down the target

• To decrease the intensity of x-rays

• To focus electrons onto a small portion of the target

• To increase the speed of electrons

Which materials are typically used for the target in an x-ray tube?

• Iron or steel

• Copper or aluminum

• Tungsten or molybdenum

• Gold or silver

What is Bremsstrahlung radiation?

• Radiation from the nucleus of the target atoms

• Radiation from the cooling system

• Radiation from electrons scattered by the target nuclei

• Radiation from the outer shell electrons

What determines the minimum wavelength in the x-ray spectrum?

• The temperature of the cathode

• The speed of the rotating disc

• The size of the target

• The highest energy x-rays produced

What happens when an incident electron ejects an inner shell electron from the target atom?

• The atom emits x-rays with characteristic wavelengths

• The atom becomes unstable

• The atom absorbs more electrons

• The atom emits visible light

How does increasing the potential difference between the anode and cathode affect x-ray production?

• It decreases the number of x-rays produced

• It decreases the energy of x-rays

• It increases the energy of x-rays

• It has no effect on x-ray energy

What is the purpose of angling the target anode in an x-ray tube?

• To direct x-rays through a window

• To cool down the target

• To increase the speed of electrons

• To decrease the intensity of x-rays

What is the effect of characteristic spikes in the x-ray spectrum?

• They decrease the overall energy of the spectrum

• They increase the wavelength of x-rays

• They are superimposed on the continuous spectrum

• They eliminate the continuous spectrum