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Photoionization Lamps

Photoionization Lamps

PHOTOIONIZATION LAMPS

Photoionization lamps are used as ionization sources in gas analyzers, gas chromatography detectors, mass-spectrometry and other devices.

The radiation spectrum of  photoionization  lamps in VUV-range consists of two resonance lines 116,5 and 123,5 nm for krypton lamps and  129,6 and 147,0 nm for xenon lamps. To extract the radiation MgF2 window is used.

 

 

Several models of both DC and RF photoionization lamps are manufactured. The advantages of DC lamps are high stability and long life time. The RF lamps are less stable and the life time is shorter, their advantages are small size and low power consumption.

The lamps with glass and ceramic discharge channel are available. During lamp operation  plasma interacts with discharge channel. For glass this results in emission of O2, CO, CO2, H2O etc molecules, that changes the gas filling of lamp and leads to lamp failure. There is no such change when ceramic channel is used, that has been confirmed by lamp spectra, where the lines of radiating gas  present only. 

 

 Radiation spectrum of Kr photoionization

lamp CDL-1050

 

 Radiation spectrum of Kr photoionization

lamp CDL-1050

Using of ceramic discharge channel increases the lamp life-time up to 10000 h, that allows to use such lamps in fixed point photionization detectors. 

Technical Specifications

Glow discharge DC Photoionization Lamps

Model

CDL-1050

CDL-1050

mod.К

CDL 1021-03

mod. BDC

CDL-1070

mod. GC

Maximum photon energy, eV

10,6 (Kr)

9,5 (Xe)

10,6 (Kr)

9,5 (Xe)

10,6 (Kr)

9,5 (Xe)

10,6 (Kr)

9,5 (Xe)

Ignition voltage, V

450

450

450

450

Operation voltage, V

230

230

230

230

Operation current, mA

0,1 – 4,0

0,1 – 4,0

0,1 – 4,0

0,1-4,0

Max. length ´ diam., mm

53 ´ 22

55 ´ 21,5

45 ´ 23,3

50 ´ 18,7

Discharge channel

Ceramic

Ceramic

Ceramic

Ceramic

Operating temperature, °С

Minus 20 - 350

Minus 20 - 45

Minus 20 - 45

Minus 20 - 350

Life time, hour

Ambient temperature

300 °C

 

5000

500

 

5000

 

5000

 

5000

500

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