7.1
1. x-ray tube
2. control console
3. high voltage generator.
In most x-ray tubes, there are two filaments to?
provide two focal spots.
Most x-ray tube used for radiography are_____?
Are dual focus tubes.
If saturation is achieved and the filament current is fixed, the tube current_______?
Remains fixed.
The primary purpose of the glass envelope of an x-ray tube is to?
provide a vacuum.
The focusing cup is_______?
is usually made of thoriated tungsten.
The cathode is______?
One of the two parts of a diode.
X-ray tube current is zero when _________?
Is zero when a filament current is below thermionic emission.
The protective housing of an x-ray tube is designed to?
reduce the hazard of leakage radiation.
Once filament temperatures become adequate, a further small rise in filament temperature will cause tube current to?
Increase very much.
When a filament burns out, the_______?
The filament current goes to zero.
A diagnostic x-ray tube is an example of which of the following?
Diode
The cathode beam of an x-ray tube is the?
focused electron beam within the tube.
The space charge effect occurs______?
Occurs in the vicinity of the cathode.
The larger filament is used during radiography when the heat load is?
High, and visibility of detail is less important.
The x-ray tube current is______?
Controlled by the filament current.
The x-ray tube filament conducts_____?
conducts approximately 5 A