the xray beam

deceleration

there is a rapidly moving stream of electrons that has a sudden ….

protective housing

a lead-lined metal structure with two large electrical cables that securely attach to the x-ray tube through special high-voltage receptacles

xray tube

the housing provides a solid stable support for the

insulator

the housing serves as an electrical

cushion

the housing provides a thermal ….. for the tube

leakage radiation

the protective housing absorbs most of the …. and reduces it to less than 100 mR/hr

heat

X-ray production is a rather inefficient process and much of the electrical energy that goes into it is converted to ….

get heat away

The housing is designed to help …. from the tube, protecting it from thermal damage

oil bath

inside the housing the tube is immersed in an

insulator

the housing of the tube has an … against electric shock

cooling fans

the housing also has …. …. that circulate air around to get rid of heat

continuous

the hosing can become rather hot with …. use

not be used

the high voltage cables should… as handles to maneuver the tube head assembly

oil will … when heated

microswitch

if oil expands too much a …. is activated and the tube cannot be used until it cools down

protective housing and xray tube

tube head assembly includes

induction motor

the general-purpose x-ray tube is an electronic vacuum tube that consists of an anode, a cathode, and an …… all encased in a glass or metal enclosure (envelope)

target and inductor motor

anode consists of

focusing cup and filaments

cathode consists of

pyrex

glass envelope made of

constant electric potential

The metal envelope variety provides a …. between the cathode electron stream and the enclosure, avoiding the arcing problem and extending tube life

target window

Both enclosure types have a specially designed …… for the desired exit point of the x-rays produced.

filament cup

filaments are connected to the

secondary circuit

the focusing cup is connected to the

dual focused

the filament is

7-15mm

each filament wire is around … long and 1-2mm wide

thorium

the coil wires are made of tungsten with a dash of

3410 C

tungsten’s melting point

thermionic emission

thorium increases increases ….. and extend filament life

parallel

filaments are situated … to eachother in the focusing cup

nickel

the focusing cup is made of

negative charge

The focusing cup receives a strong ….. from the secondary circuit that

cloud, repulsion

The focusing cup receives a strong negative charge from the secondary circuit that forces the electrons together into a ….. as they are boiled off of the filament through electrostatic …..

anode

provides the target for electron interaction to produce x-rays

anode

electrical and thermal conductor

moving

some electrons interact with the target and some just keep…. with the current

stationary anode

stationary anode

tungsten button embedded in a copper rod

rotating anode

spread the heat

The purpose of rotating the anode is to …. ….. ….. produced
during x-ray production over a larger surface area

molybdenum, tungsten, copper, molybdenum

the anode has a rotating dish made of… coated with …. on a… shaft with a …. core

atomic number and melting point

tungsten has a high ….

thermal conductivity

molybdenum has low

melting point and atomic number

tungsten has a very high ….

rhenium

…. is added totungsten

thermal, electrical

copper is used as part of the shaft because it has good …. and …. conductive properties

3400rpm

most rotating anodes revolve at

10000rpm

anodes at high capacity revolve at

stem of the anode

shaft between the anode and the rotor

lower

molybdenum and graphite have a …. mass density then tungsten, making the anode lighter and rotate quicker

cracks

when the rotating anode will sometimes fail and it overheats and ….

induction motor

anode is rotated using an

stator and rotor

2 major parts or the anode motor are the…

stator

part of the motor made of electromagnets

rotor

part of the motor made of an iron core surrounded by coils

rotor

during mutual induction stators are energized in opposing pairs and induces a current in the …..