Quantar Technology

Charged-particle/soft x-ray detectors

Photo of imaging detector

These UHV-compatible, in-vacuum detectors are used for a wide range of 1-D parallel multichannel spectroscopy (XPS/ESCA, EELS, etc) and full 2-D imaging applications (beam analysis, LEED, etc). The detectors are sensitive to and count and image single electrons, ions and other charged particles as well as EUV and soft-X-ray radiation. These detectors are available with active areas of 18 mm, 25 mm, 40mm, 75 mm diameter and 80 x 100 mm as well as custom sizes. Spatial resolution is as high as 1:400 of the detector diameter. Systems are available with maximum count rate capabilities of up to 1,000,000 events/sec.

This pulse-counting approach, combined with full position-sensitive capabilities in a single detector, offers considerable advantages to the user in low-count rate applications. These include high single-event S/N ratio, low detector background, and the ability to digitally integrate in external memories for long periods without pixel-to-pixel crosstalk. The detectors use multiple microchannelplate (MCP) electron multipliers with charge-division position encoders.

In addition, single-event time-resolution is available with these systems, combined with the imaging capability.

Optical photon detectors

Photo of single photon imaging detection system

These vacuum-sealed units are position-sensitive, single-photon-counting PMT's that are similar in operation to the charged-particle systems discussed above. The active area is 25 mm diameter. They incorporate an integral photocathode for use from below 180 nm to beyond 900 nm. They are widely used in low-light optical spectroscopy, fluorescence and luminescence imaging and in particular, in time-resolved work where single-event time resolution (as good as sub-100 picosecond), combined with imaging, is of interest.

PC-based data acquisition and display systems are also available.

Full technical information on Quantar products is available on their web site.

European customers requiring price information on any of Quantar's products: please email sales@kore.co.uk or use our web form.

Top

Last updated: Tuesday, August 16, 2005, 18:16