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Questions and Answers
What is the primary function of the anode in an x-ray tube?
What is the primary function of the anode in an x-ray tube?
- To generate x-rays through electron bombardment
- To provide mechanical support and dissipate heat (correct)
- To filter out unwanted radiation
- To amplify the intensity of x-ray beams
Which material is NOT commonly used for constructing anodes in x-ray tubes?
Which material is NOT commonly used for constructing anodes in x-ray tubes?
- Molybdenum
- Graphite
- Copper
- Aluminum (correct)
What engineering challenge is primarily associated with higher-capacity x-ray tubes?
What engineering challenge is primarily associated with higher-capacity x-ray tubes?
- Achieving effective heat dissipation (correct)
- Increasing the size of the anode
- Maintaining a constant voltage
- Enhancing the speed of rotating anodes
Which type of anode is typically used for general-purpose x-ray tubes?
Which type of anode is typically used for general-purpose x-ray tubes?
Which of the following statements about the interaction of projectile electrons with the anode is correct?
Which of the following statements about the interaction of projectile electrons with the anode is correct?
Flashcards
Anode
Anode
The positive side of the x-ray tube. It's responsible for converting electron kinetic energy into x-rays.
Anode's main function
Anode's main function
The primary function of the anode is to efficiently convert the energy of electrons hitting it into x-rays.
Stationary Anode
Stationary Anode
This type of anode is stationary and doesn't rotate. It's used in lower-power applications like dental x-rays.
Rotating Anode
Rotating Anode
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Heat Dissipation in the Anode
Heat Dissipation in the Anode
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Study Notes
Anode Types in X-Ray Tubes
- Two types of anodes exist: stationary and rotating.
- Stationary anodes are used in dental and some portable imaging systems where high current and power aren't needed.
- Rotating anodes are used in general-purpose x-ray tubes, which require higher-intensity x-ray beams.
Anode Functions
- The anode is an electrical conductor that generates heat.
- It provides mechanical support for the x-ray target.
- The anode needs to readily dissipate heat.
Anode Material and Heat Dissipation
- Anode materials such as copper, molybdenum, and graphite are commonly used.
- More than 99% of the projectile electron's kinetic energy is converted into heat.
- Efficient heat dissipation is crucial for high-capacity x-ray tubes.
Cathode and Filament Configuration (Rotating Anodes)
- Rotating anode x-ray tubes often have two filaments in the cathode, positioned side by side, for adjustable focal spot sizes.
- Bi-angle x-ray tubes arrange the filaments end-to-end, with the small filament above the large one.
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