X-ray tubes

Metal-ceramic X-ray tube IRTP-240 is to be used in X-ray equipment Arina-7 and Arina-9. It has higher power and longer operation time.

General information about X-ray Tubes
X-ray tubes are electric-vacuum devices used as a source of x-ray emission. Such emission appears at the electron stagnation, emitted by the cathode, and their hitting against the anode (anticathode); at that the energy of the electrons, accelerated by the strong electric field in the space between the anode and the cathode, partially transforms into the energy of x-ray emission. The emission of x-ray tubes is the imposition of the stagnating x-ray emission to the characteristic emission of the anode substance.
Types of X-ray Tubes

X-ray tubes differ by:
The way electrons are received – with thermal-emission (heating) cathode, autoemission cathode, cathode heated by the bombarding by positive ions and with radioactive (b) electron source;
The way of vacuuming: sealed, demountable
The time of emission: continuous, pulsed
The type of anode cooling: water, oil, air, radiational
The size of focus (the space of emission on the anode): macrofocused, microfocused and sharpfocused
Its form: ring-shaped, round, linear
The way of focusing of electrons onto the anode: with electrostatic, magnetic or electromagnetic focusing

Application of X-ray tubes
X-ray tubes are used in x-ray structure analysis, x-ray spectral analysis, defectoscopy, x-ray diagnostics, x-ray therapy, x-ray microscopy, and x-ray micrography. Sealed x-ray tubes with thermal-emission cathode, water-cooled anode and electrostatic system of electron focusing are most widely applied in all spheres.

Characteristics of X-Ray Tubes
Thermal-emission cathode of an x-ray tube is usually a spiral or a straight thread made of wolfram wire, heated by electric current. The working area of the anode is a metal mirror surface; it is placed perpendicularly or at an angle to the electron flow. To achieve the continuous spectrum of x-ray emission of high energies and intensity, anodes made from Au, W are used. In structural analysis x-ray tubes with anodes made from Ti, Cr, Fe, Co, Ni, Cu, Mo, Ag are used. Main characteristics of x-ray tubes are:
Max allowable accelerating voltage (1-500 kV)
Electron current (0.01 mA – 1 A)
Anode dissipation power per unit (10-104 W/mm2)
Total consumed power (0.002 W – 60 kW)
Focus size (1 m – 10 mm)
Coefficient of efficiency of x-ray tubes is 0.1 – 3 % 
 

Characteristic, unit measure	IRTP-240				IRTP2-240
	rate			test data	rate			test data
	min	nominal	max		min	nominal	maximum
Pulse voltage amplitude, kv	180	210	240		180	210	240
Focus spot diameter, mm	-	3 ± 0.5	-	3 ± 0.5	-	3 ± 0.5	-	3 ± 0.5
X-ray radiation exposure doze behind the steel barrier of 40 mm	30 x 10-3	-	-	(50-60) x 10-3	30 x 10-3	-	-	(40-50) x 10-3
Warranty operation time, pulses		106		106		106		106
Size, d x l, mm		62 x 100				62 x 136
Mass, kg, max		0.3				0.35
Characteristic of measurement mode
Capacity discharge on the tube, pf	-	50	-		-	50	-
X-ray flares' repetition rate, Hz	-	10	-		-	10	-
Exposure time, sec	-	60 ± 1			-	60 ± 1

IRTP-240        

IRTP2-240