Advantage UV-Radiation!
UV-radiation is an high-energy radiation, the shorter the wave length (UV-C), the more energy per photon.
So some applications can be accelerated significantly, much improved quality-wise or even only made possible in the first place.
Certain cleaning processes do have - due to their execution with chemicals - toxic waste products, which are simply not there when implementing the process with UV radiation.
The Discharge![Funktion Xeradex]()
"DBD" or how to generate 172 nm - Radiation?
For the so-called Dielectric Barrier Discharge a gas-tight discharge vessel - a quartz bulb in the case of 
the Xeradex® lamps - is used to insert an inner electrode and to apply outer electrodes as strips, filled with gas (xenon) and sealed in a gas-tight manner.
The gas filling is excited by supplying pulsating electric current, so that high-energy photons are emitted in the discharge process.
This radiation then has got the exact wavelength of 172 nm and can be used for the required application (e.g. ozone generation).
The generation of radiation of shorter wavelengths is technically hardly possible (only with open plasma).
The Excimer-Process![Excimer-Prozess]()
In the xenon gas filling in the lamp bulb, the electric excitaiton generates unstable xenon molecules Xe2*, so-called excimers. These disintegrate relatively quickly again and emit just those high-energy photons with 7.2 eV energy as radiation of 172 nm wavelength.
The line width FWHM (Full Width at Half Maximum) is very low at 14 nm. So the radiation can be used very selectively for processes.
The penetration depth of the radiation depends on the substrate properties in particular.
Extra Efficiency by Patented Pulse Mode
The standard excimer process is excited by supplying alternating current (AC) in a kV range.
If the control gear supplies this high voltage on an impulse basis, however, the efficiency increases up to about 40%. Some electronic ballasts are even fully computer controllable.
Operation and Surroundings
Employment of Mirrors: Increase of Radiation Density
Mirrors for reflection of VUV radiation need a special coating. They are shaped optimally by using a special computer simulation method, so that the radiation is distributed most efficiently and homogeneously. Thus, the radiation intensity onto the substrate increases by about 60%!
So there is such a special mirror for every Xeradex® lamp fitting its size.
Please, observe our cleaning instructions.
Surface Treatment in Vacuum or Low Pressure
Should the surface to be treated not come into contact with air or other gases, a UV radiation treatment in vacuum will be the only technically feasible method. This might be the case, for example, for coating processes like CVD (chemical vapour deposition) or PECVD (Plasma enhanced CVD).
There are special Xeradex® models with vacuum flange, where the electrical connection is outside the vacuum chamber.