radiation physics

what is magnetism?

any charged particle in motion creates a magnetic field

what is electron spin?

it causes angular momentum

what is magnetic domain?

An accumulation of many atomic magnets
with their dipoles aligned

what is diamagnetic?

Weakly repelled by either magnetic pole and can’t be artifically magnetized 

what is diamagnetic example?

water

what is Paramagnetic?

Feebly attracted by a magnet

what is Paramagnetic example ?

MRI contrast agents

what is Ferromagnetic?

strongly attracted by a magnet

what is Ferromagnetic example?

Iron, cobalt, and nickel

what are the 3 magnetic laws?

closed loops, north and South Pole, any charge in motion creates an electrical field

what is a solenoid?

Stacking more loops on top of each other
increases the intensity of the magnetic field
running through the center or axis of the
loops

what is a electromagnet?

The magnetic field can be intensified further by wrapping the coil of wire around
ferromagnetic material
(such as iron)

what is faraday’s laws?

Strength of magnetic field
• Velocity of the field as it cuts through the conductor
• Angle of the conductor to the magnetic field
• Number of turns of the conductor

how is electromagnetic induction applied in the x-ray tube?

Apply to turn the motor

What is on the outside of the x-ray tube?

Stator

What is on the inside of the xray tube?

Rotor

why does a transformer use AC?

the angle of the conductor

what is the relationship of current and voltage?

inverse

what are the three parts of xray imaging system?

xray tube, operating console, high voltage generating 

what kind of voltage do you see in the console?

Allows technologist to control the x-ray tube
current and voltage so that the useful x-ray
beam is of proper quantity and quality

what is the function of a line compensator?

Measures the voltage provided to the x-ray
imaging system and adjusts that voltage to
precisely 220 V

what is an autotransformer?

Has a single winding wound around a large
iron core

how does autotransformer work?

Works on principal of
self-induction

what is the highest quantity that it can step up voltage?

the HIGHEST quantity that can be stepped-up is 2x the outputted value

what is the normal range of current and voltage for a filament transformer?

Current: usually 3-6 Amps
Voltage: usually around 12 Volts

what does the current need to be higher for a filament transformer?

higher so thermionic emission will occur.

what are type of exposure timers?

synchronous, electronic, mAs, automated exposure control 

what is rectifiers?

the process of converting AC to
DC

what are the type of single phase power?

unrectified voltage, half-wave rectification, full wave rectification

what are the special types of transformer, wiring, designer scene?

star, delta, three phase six pulse, three phase twelve,

what is capacitor discharge generator?

charging a series of SCRs from the DC voltage of a nickel-cadmium (NiCd) battery

what is a voltage ripple?

voltage waveforms, Less voltage ripple
results in greater
radiation quantity and
quality

What are the percentages for voltage ripple?

1, 4, 14, 100

what is the power rating equation?

mas x kvp / 1000

Why is the high voltage generator submerged in oil?

Conduct heat away, prevent spark over, prevent dirt