final Flashcards
Electrons are accelerated from cathode to anode
by kiliovoltage
The force that holds electrons in orbit around the nucleus of an atom is
binding energy
The K-shell binding energy of Tungsten is approximately
69.5 KeV
Tungsten is the anode target material of choice due to
its ability to conduct heat, high melting point, and high atomic number.
A high speed incident electron (projectile electron) possesses
kinetic energy.
The L-shell binding energy of tungsten is approximately
12.1 KeV.
The number of electrons thermionically emitted from the filament per second is measured as
milliamperes (MA)
The number of electrons actually propelled from cathode to anode is measured as
milliampere-seconds (MAS).
The percentage of electron kinetic energy that is actually converted to x-ray is approximately
1%.
The N-shell binding energy of Tungsten is approximately
0.6 KeV.
The electrical component with the function of emitting electrons is known as the .
cathode
Oil is found in the tube housing to do all of the following
electrically insulate, absorb unusable x-ray, and conduct heat away from the tube.
The focusing cup of the cathode functions through the process of
mutual repulsion.
The area of the anode struck by electrons is known as the
target/focal spot.
The factor that has primary control of beam quality is
KVP
The atomic number of Tungsten is
74
The filament of the cathode is composed primarily of
Tungsten
The process of hardening the x-ray beam is due to
increasing filtration
The force causing the anode to rotate is
magnetic induction
The electrons liberated by thermionic emission and “hovering” within the vacuum tube possess
potential energy
The electrical component with the function of receiving high speed electrons is known as the
anode
The cloud of electrons that have been thermionically emitted is known as
space charge
The amount of total beam filtration must be equivalent to at least
2.5 mm of aluminum
As the atomic number of an element increases its electron binding energy values
Increase