# Physics Photon Production quiz I

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1. What are the necessary items for the production of X-rays in the tube?
Source, Force (accelerator), Decelerator
2. What is the source for the production of X-rays in the tube?
Electrons from filament or cathode (negative) (mA or mAs)
3. What is the force (accelerator) for the production of X-rays in the tube?
kVp, energy behind the mA or mAs
4. What is the decelerator for the production of X-rays in the tube?
Anode (positive); something to smash into to create the X-rays
5. Electrons have _______ energy. (Energy in motion)
kinetic
6. So what is the process of using the machine and turning it on?
The technologist sets up the amperage (mA), time (ms) and voltage (kVp), then hits the rotor, then depress the exposure switch, and then the x-ray production occurs from two interactions in the anode.
7. What happens when you hit the rotor?
Electricity flows through the circuit, Electrons flow to the filament (waiting for exposure), and the anode spins.

Electrons boil off the filament which causes thermionic emission and the electron cloud is space charge
8. What happens when you depress the exposure switch?
• More electricity flows through the circuit, This electricity pushes the electrons at the filament across to the anode, and then the X-rays are created through this interaction.
• Electrons move from the filament to the target which is the anode focal spot. When the x-rays are created the electron kinetic energy is 100% and the conversation for xray production is 99% (99.8) heat and 1% (0.2) x-rays.
9. What percentage is electron kinetic energy?
100%
10. What is the percentage for the conversation for x-ray production?
99% (99.8) of the electrons kinetic energy is changed to heat and 1% (0.2) of the electrons kinetic energy is changed to x-rays
11. The boiled electrons travel at ____ the speed of light in the tube from the filament (cathode) to the target (anode).
Half (1/2)
12. Electricity moves from _____ to _____.
left; right
13. What happens in the target?
The projectile electrons coming from the filament are interacting with the atoms in the target.
14. What is the anode or target made out of?
Tungsten
15. What is the symbol for Tungsten?
W
16. What is the atomic number of Tungsten?
74