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UVS 40A2 UV SOURCE

DESCRIPTION

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.

FEATURES

  • 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

OPTIONS

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

TECHNICAL DATA

Mounting flange     DN 40 CF (non-rotatable)

Gases          He, Ar, H2  (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. 6bar), 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

Beam diameter       dependent on working distance

(FWHM)            (e.g. 1.2 mm for distance 10 mm)

Typical working        5 – 100 mm (optimum 5 – 50 mm)

Distance

Bakeout temperature     up to 200 °C

Working pressure       < 1 mbar

 

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