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Physics
X-rays: Production and Properties
17
Physics
Undergraduate 4
11/15/2009

Additional Physics Flashcards

 


 

Cards

Term
Three main circuits
Definition

primary low voltage circuit

secondary high voltage circuit

filament circuit

Term
autotransformer
Definition

kV selector

 

Term
Pre-reading kV meter
Definition
displays the kV
Term
Line Voltage Compensator
Definition

permits adjustment of the line voltage to the correct value

 

compensates when a power surge comes or lack of power

Term
exposure switch
Definition

control the current to the primary coil of the transformer

 

low-voltage

Term
Ionization Timer
Definition
AEC (Automatic Exposure Control)
Term
components of ionization chamber
Definition

chamber

gas

capacitor

 

Term
Photomultiplier tube (PMT)
Definition
amplifies/multiplies the number of electrons within the photo chamber
Term

Density selector

 

+1=

+2=

Definition

increases/decreases the amt. of density on image

 

25% increase

50% increase

Term
Minimum response time
Definition

time it takes to terminate the exposure after the proper amt. of radiation has been sensed

 

Term

High voltage circuit

 

composed of??

Definition

(secondary circuit)

 

milliameter (mA)

mAs meter

rectifier

high voltage cables

Term
milliameter
Definition

displays/measures amount of current flowing in the x-ray tube

 

(registers during expsoure of more than 1/10s)

Term
mAs meter
Definition

measures mAs of the exposure

 

(exposures of less than 1/10s)

Term
rectifier
Definition
converts AC to pulsating DC
Term
high voltage cable
Definition

from generator to tube

 

composed of 3 conductors surrounded by insulation, one of which is grounding

Term

Filament circuit

 

composed of???

Definition
  • helps heat the filament to produce the electron cloud
  • increase current=increase heat
  • mA selector (rheostat)
  • step-down transformer
  • filament stabilizer
Term
filament stabilizer
Definition
corrects flux in line voltage
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