MI: xray circuit and xray tube parts (final)

on/off switch for unit

main power switch

protects against short circuit and electric shock

circuit breaker

autotransformer

-one core and one coil--self induction
- increases voltage/ decreases amperage

adjusts the power that is supplied to xray machine to 220 volts

line compensator

determine quantity of electrons boiled off of filament

exposure timer

exposure timer

A device that regulates the length of time the electrons are allowed to cross the tube and, therefore, the time x-rays are produced to create a radiographic image.

-primary and secondary coils= _______
-low volt to high energy kilovoltage
-more turns on right

step-up transformer
-mutual induction

-in filament circuit
-increase current by reducing voltage applied to filament/ increases amperag

step-down transformer

convert AC to DC; allows only electron movement in one direction--safe for machine

rectifiers

mA selector/ variable resistor

rheostat

rheostat

Indicates and regulates amount of current flowing through equipment

positive end of xray tube
negative end of xray tube

anode
cathode

target for electron interaction to produce xrays

tungsten anode

_______ uses line-focus principle (angling) and anode heel effect

(tungsten) anode

actual area where electrons strike

focal spot

iron core; repulsion of magnetic energy causes rotation

rotor

converts electrical energy into mechanical energy; electromagnets aligned

stator

electrons from cathode and flow to anode

tube current

provides source of electrons

cathode filament

where do electrons boil during thermonic emission

filament in focusing cup (cathode)

focusing cup forms boiled electrons into ______

space cloud
note: anode is attracted to cloud---tube current flows to anode