Rad 102 Chapter 2: The Xray Beam

What is the portion of the x ray tube that contains the filament called?

Cathode

What is the cathode filament made of?

Tungsten

What are the characteristics of the focusing cup?

- Space charge effect

- Has a negative charge

- Made of nickel

In a dual-focus tube, how many filaments are energized at any one time during x ray production?

Only one

What material is the focusing cup made of?

Nickel

What is the phenomenon that occurs around the filament during thermonic emission and prevents further escape of electrons from the filament?

Space Charge Effect

What is the positive side of the x ray tube?

Anode

What is the maximum speed the rotating anode will most likely achieve in RPM?

10,000 RPM

What is the base material of the anode disk?

Molybdenum and graphite

What is the name of the fixed physical area on the anode target that is struck by the electron stream?

Focal spot

What is the name of the device in a rotating anode x-ray tube that turns the rotor?

Stator

Effective compensation for the anode heel effect would involve what type of positioning?

Positioning the thinnest portion of the anatomic part under the anode side of the tube

What is an acceptable level of leakage from the tubing housing?

100 mR per hour at a distance of one meter

Which of the following could be defined as the production of an x-ray photon by the electrostatic attraction between the incident electron and the nucleus of the tungsten atom?

Bremsstrahlung interaction

What could be defined as the production of an x-ray photon by a collision between the incident electron and a K-shell electron of the tungsten atom?

Characteristic interaction