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Exposure Exam
Rad 103
20
Other
Undergraduate 1
10/02/2011

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Cards

Term
2 main parts of an x-ray tube
Definition
cathode,anode
Term
Purpose of a cathode?
Definition
produce electrons
Term
2 main parts of a cathode
Definition
filament,focusing cup
Term
what is the filament made of?
Definition
Tungsten
Term
Purpose of a focusing cup?
Definition
focuses the electrons onto the anode
Term
Anode's charge
Definition
positive +
Term
What is an anode made of?
Definition
Mo coated with W & rhenium
Term
What is the area called where electrons strike the anode?
Definition
focal track
Term
3 things needed to make an x-ray
Definition
electrons,push them over, stop them
Term
Thermionic emission
Definition
electrons boiled off from filament
Term
Cloud around the filament
Definition
space charge
Term
2 forces that get electrons from cathode to anode
Definition
opposite charges & KVP (power)
Term
Which part of the tube rotates?
Definition
anode
Term
Size of area where electrons hit the anode
Definition
focal spot
Term
What is the reason for the glass envelope to contain lead?
Definition
to absorb leakage radiation
Term
If you use a large mA setting, which filament will you be using?
Definition
large
Term
Isotropic (sparkler)
Definition
goes out in all directions equally
Term
Which of the 4 qualities does the focal spot affect?
Definition
Recorded Detail
Term
What type of energy is the kinetic energy of electrons turned into?
Definition
electromagnetic energy
Term
First step in x-ray production?
Definition
heat filament
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