Exam 1 - 2. Radiation Physics Flashcards
(48 cards)
4
What are the 5 components of the operator control panel?
5-6
What are the 8 components of the tube head?
7
Is the cathode negative or positive?
7
The cathode end of the X-ray tube has a ____ filament.
7
The cathode end of the X-ray tube is a source of _____.
7
The cathode end of the X-ray tube is heated with a _______ and emits electrons at a rate ________. The term for this is _____.
7
The focusing cup is made of ____.
7
The focusing cup is ____ charged.
7
The focusing cup focuses ____ into a narrow beam directed to the _____, which is ____ charged.
8
Is the anode positive or negative?
8
The tungsten target transforms the _____ into _____.
8
The tungsten target is highly _____. It produces ____% heat and ____% X-rays.
8
The copper stem of the anode end of the x-ray tube works as a ______ to ________ to avoid ____.
9
What are four reasons why tungsten is selected as the target?
9
What effect does high atomic number have on x-ray production?
9
What effect does high melting point have as a target?
9
Tungsten has a high thermal conductivity to ______.
9
Tungsten has a low vapor pressure, which helps to ______l
10
What are the four conditions necessary for X-ray production?
11
Thermionic emission: production of an electron cloud:
Low voltage filament current heats the tungsten filament to ______ with resultant _________ from the tungsten atom. This is called ____.
12
Acceleration of electrons to a high speed:
High potential difference is produced between the _____ and the ____ by applying a _____ between them. A ______ is used. Electrons are accelerated to a _____.
13
Concentration/Focusing of electrons:
Electron beam is focued by the _____ and directed toward the _____.
14
Sudden stoppage of electron stream to produce x-rays:
Upon striking the focal spot in the anode, the electron stream is ____, and _____ of the electron stream undergoes conversion to ______ and ______. The copper stem removes the ____ from the tungsten.
16
The focal spot is the area on the target to which the ______ directs the _____ and from which the ______.
