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34 Cards in this Set
- Front
- Back
- 3rd side (hint)
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AC Source
Incoming line Current Generator |
Purpose- to supply x-ray circuit with electricity
Function- Convert mechanical energy to electric energy. Principle- Electromagnet Induction |
Location- Outside of Low Voltage
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Main Breaker
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Purpose- Supply Power
Principle- Electrification by contact |
Location- Primary side of Low Voltage circuit. Enclosed in a electric power box
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Control Buttons
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Purpose- To select Voltage
Principle- Electrification by contact |
Location- Primary side of Low Voltage Circuit
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Line Voltage Compensator
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Purpose- To increase/decrease the line voltage
Principle- Electromagnetic Induction (makes the sine wave uniform |
Location- Primary side of Low Voltage
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Autotransformer
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Purpose- Select a pre-determined amount of kilovoltage.
Principle- Electromagnetic Self Induction |
Location- Primary side of low Voltage Circuit
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Pre-reading Voltmeter
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Purpose- Measure Voltage
Principle- Motor |
Location- Low Voltage Circuit
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Timers
1. Electronic TImers 2. mAs Timers 3. AEC Timers |
Purpose- To regulate the length of time the x-rays are released.
Principle- mAs and Electronic TImers Controls amont of time. AEC Timers are ionization chamber (ends exposure |
Location- Control Panel on Primary low Voltage Circuit
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Circuit Breaker
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Purpose- To protect electrical circuit from damage caused by overload.
Principle= To stop flow of electric current in an stressed electric circuit |
Location- Primary Low Voltage Circuit
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Primary Coil of Step-Up Transformer
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Purpose- Supply AC that is needed
Principle- Electromagnetic Mutual Induction |
Location- Low Voltage Circuit
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Secondary Coil of Step-Up Transformer
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Purpose- Increase voltage, decrease amps needed to produce x-rays.
Principle- Electromagnetic Induction |
Location- Secondary side of High Voltage circuit
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Ground
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Purpose- Neutralize the charge, so the circuit is neutral.
Principle- Neutralization |
Location- Secondary side of High Voltage Circuit
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Milliameter
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Purpose- Measure the flow of milliampers flowing thru the secondary coil of step-up transformers
Principle- Motor |
Location- Secondary High Voltage Circuit
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Filament Circuit
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Purpose- Create the appropriate thermionic cloud at the filament
Principle- To supply the filament with modified power. Modifies incoming line power. Electricfication by contact |
Location- Filament Circuit
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Voltage Controlling Devices
1. Rheostat 2. Choke 3. Saturable Reactor |
Purpose- Decrease Volt/Increase Amps
Principle- Rheostat (varies the resistance) Choke coil (back emf produced thru electromagnetic self induction) Saturable Reactor (Same as choke coil) |
Location- Filament Circuit
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Filament Ammeter
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Purpose- Measure Amps on the filament.
Principle- Electromagnetic Self Induction |
Location- Filament Circuit
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Primary Coil of Step-Down Transformer
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Purpose- Supplu AC for induction
Principle- Electromagnetic Self Induction |
Location- Filament Circuit and Low Voltage Circuit
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Secondary Coil of Step-down Transformer
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Purpose- Increase Amps
Principle- Electromagentic Self Induction |
Location- Filament and Low Voltage Circuit
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X-Ray Tube
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Purpose- Produces the x-ray thru thermionic emission and x-ray bombardment.
Principle- Electromagnetic Self Induction |
Location- Filament and High Voltage Cirucuit
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Miliameter
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Purpose- Measure tube current milliamps
Principle- Motor |
Location- High Voltage Circuit
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4 Diode Rectifiers
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Purpose- To change AC to pulsating DC
Principle- Semi- Conduction |
Location- Secondary High Voltage Circuit
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What prevents electrons moving from cathode to anode
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Vaccum
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What is the purpose of the filament circuit
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Provide amps
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What are the 2 filaments
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Small and large focal spots
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What does the smaller focal spot provide
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More detail on image
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What is the purpose of the larger focal spot
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Allows more mA
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What is the type of filament material used and why
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Tungsten is used b/c of its high melting point and difficult to vaporize
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What is the purpose of the focusing cup. What type of charge does it carry
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It focus and the narrow the beam. It carries a negative charge
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What is biase
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Biase means it is on an angle and allows it to be focused in a narrow beam. Needs to have the same negative potential that is on the filament
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What is space charge effect
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Limits x-ray tubes to maximum mA ranges
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What is Saturation Current
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When there is no further thermionic electrons to drive to the anode. An increase in kV will not increase the tube current
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How is filament current measured
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Amps
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How is tube current measured
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Miliamps
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What is the purpose of the bearings
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To allow the rotors to turn
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What is responsible for rotating the anode
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Induction motor
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