UV Source UVS 40A2

UV Source UVS 40A2

Technical data

Mounting flange DN 40 CF (non-rotatable)
Gases He, Ar (option: Kr, Xe, Ne)
Photocurrent 1 - 80 nA
Photon flux >1016 photons / s*sr
He I / He II ratio better than 3:1
Water cooling required, pressure 2 - 3 bar (max. 6 bar), flow > 1.5 l/min, Tmax= 30 °C
Port aligner integral , +/- 4°
Discharge current 40 - 300 mA
Beam divergence small beam divergence: <1°
Capillary I.D. 1.5 mm (others on request)
Insertion length 220 mm (standard), other on request, OD: 9.5 mm
FWHM dependent on working distance (e.g. 1.2 mm for distance 10 mm)
Typical working distance 5 - 100 mm (optimum 5 - 50 mm)
Bakeout temperature up to 200 °C
Working pressure < 1 mbar

The UV Source (UVS) is a high intensity photon source that can be operated with a variety of discharge gases.

The UVS 40A2 is used in UPS (ultraviolet photoelectron spectroscopy) research. The UVS is water cooled for maximum stability and features fully interlocked safety circuitry. The discharge has a maximum photon intensity at a pressure of several mbar so dual differential pumping stages are employed in order to maintain the host chamber pressure. The UVS 40A2 is designed so that a continuous gas flow is maintained through the discharge region. This is a great advantage in maintaining the cleanliness of the discharge capillary and results in very long service intervals.


  • Can be operated with various discharge gases
  • Manual or auto ignition
  • Control of the He I / He II ratio via precise adjustment of helium pressure and discharge current
  • Easy operation
  • Stable output
  • Special designed discharge chamber
  • Electronically stabilised discharge current
  • Windowless, direct sight connection


  • Gas dosing system
  • Customised insertion length
  • Linear shift (50 - 100 mm)
  • Differential pumping (required)
  • Chiller



Download brochure

Related products

» Electronics

UV Source Power Supply UV40A-PS

» UV Source Power Supply UV40A-PS

For controlling the UV source UV40A1 in ultraviolet photoelectron spectroscopy (UPS) applications.

read more
See more  ›


this site uses cookie files.

We use information saved in cookie files, among others, in statistical purposes and in order to fit the service to individual needs of the user. In your browser you can change your cookie files settings.

Using the site without changing cookie files settings means they will be saved in device memory. More information with tips how to change settings can be found in Privacy policy.


Query list