Standard VUV5k-package

The VUV5k-package standard is the combination of the VUV5000 UV-source and the VUV5040 UV-monochromator. These components form a unique light source. The VUV5000 is the most intense He-light source on the market. It also has the narrowest line width. The unique feature of the VUV5040 UV monochromator is that it can utilize the full output of the VUV5000 giving extremely high intensity at the sample even after monochromatization.

The VG Scienta Standard VUV5k-package includes the following components:

VG SCIENTA VUV5000 UV Source

This is a very high intensity, narrow bandwidth He radiation source with a total VUV flux of more than 2 x 1016 photons/sr s. It includes the VUV5050 source head and the VUV5011 microwave generator. The microwave guide components are also included. The VUV5000 UV-source is optimized for use with the VUV5040 monochromator described below, but it may also be used stand alone with a capillary VUV light guide to the sample.

Emitted radiation using Helium gas with >99.999% purity:

• 304 Å (41.8135 eV), FWHM < 2 meV (> 10 %)
• 537 Å (23.08 eV), FWHM < 1.2 meV (~ 8 %)
• 584 Å (21.2182 eV), FWHM < 1.2 meV (~ 82 %)

Guarantee:

The VUV5000 UV-source produces 2.0 microA using a 2.8 mm I.D. capillary, -15 V bias and Al photocathode.

VG SCIENTA VUV5051 Differential pumping addition

VUV5050 UV-source head differential pumping addition. The VUV5051 includes both and entrance and an exit capillary in order to maximize the differential pumping efficiency.

VG SCIENTA VUV5040 UV-monochromator

The Scienta VUV5040 is a compact monochromator optimized for high efficiency at both HeI and HeII. Complete separation of HeIa and HeIß is achieved while maintaining a 1 meV bandwidth. The VUV5040 is delivered with a VUV5046 exit stage described below. The VUV5040 also includes a port aligner.

Specifications:

Exit port incl. port aligner: CF35
Pumping port: CF100
Baking temperature: 150 degrees C
Grating adjustable: ± 5 mm perpendicular to the VUV beam
0:th order to 122 nm. Adjustable by two linear motion
feedthroughs, backlash-free.
Groove profile: Laminar, ion-etched.
Typical Grating properties: Geometry:  Toroidal.
Number of grooves: 1200 gr/mm.
304 Å Efficiency: 40 % at 1:st order.
304 Å Efficiency:  < 0.5 % at 2:nd order

VG SCIENTA VUV5045 Monochromator Entrance Valve

The VUV5045 is a manual shut-off valve (a pneumatic model is available as an option) to be placed between the UV-source lamp head and the UV-monochromator to enable easy servicing of the UV-source without venting the experimental set-up. The component includes a monochromator entrance aperture.

VG SCIENTA VUV5046 Monochromator Exit Stage

Exit stage with interchangeable output capillaries of different diameters. The capillary will then guide the photons to the sample. Three capillaries are included and delivered with the set-up. The standard working distance is 15 mm, but this can be customized. If a tapered capillary is used we recommend a working distance of not more than 10 mm.