2 part 1

part of the cathode that emits electrons, resulting in a tube current

this is a coil of wire, approximately 2 mm in diameter and 1-2 cm long

emits electron when heated

two types of cathode

it is called _ cathode because they do not have heated filament

its action depends on the presence of small residual amount of gas present in it and the radiographer kept a selection of tubes of various mAs values on a rack

when the change in mAs was recquired, the radiographer disconnected the tube and replaced it with different one

determines the rate at which xrays are produced in the xray tube

it is the device meant for xray production; vacuum tube; contains a pair of electrode

cold cathode tube is also called

xray tube is a device based on the _

in cold cathode tube, the cathode is on the _, and the anode is in the _ with attach heat sink at left

in cold cathode tube, the device at the top is a softener used to regulate the _

the coolidge tube was improved by _ in

in the coolidge tube, electrons are produced by

two types of anode

small focal spot area
low heat loading
mostly used in dental unit and portable machine

is the device that supplies electric power to the xray tube

the tube requires electrical energy for two purposes:

hot cathode tube is also called

rotate at very high speed
large focal spot area
high heat loading capacity
mostly used in diagnostic machine

the mechanism of an xray generator is usually continued in two separate compartments;