lexsyg smart – research capable TL OSL reader

lexsyg smart is a low cost luminescence reader for standard routine measurements of luminescence using TL and OSL (thermal and optical stimulation). Based on the success and experience of our fully automated lexsyg research TL OSL reader system, the lexsyg smart offers all routine functions necessary for fast and standard measurements.

This system can be used for standard TL and OSL measurements in Geo-/Archaeochronometry, mineralogical research, solid state and retrospective dosimetry, radiation control and material sciences.

Facts

• TL/OSL Luminescence reader specifications

• for samples carriers of 10 mm diameter
• negligible radiation exposure of stored samples (radiation cross talk)
• easy to handle and safe service
• inert gas purging of smalll measurement chamber volume ∼10 ml
• dimensions 30 x 42 x 35 cm

• Thermoluminescence upto 500 degree Celsius

• linear heating and isothermal measurements
• ramping rates between 0.1 K/s and 10 K/s
• heating up to 710° C (available on request)

	TL OSL Dating System	TL OSL reader (dosimetry)
Sample wheel (40 positions)	yes	Optional
Measurement Chamber	yes	yes
Beta irradiation module	yes	Optional
Blue/IR excitation (OSL, IRSL)	yes	yes
UV-VIS PMT	yes	yes
Detection filter changer	Optional	Optional

lexsyg research – the most advanced TL/OSL reader

Measurement Chamber

The lexsyg research system has a capacity for up to 80 cups/discs (10 mm) and is designed for vacuum/inert gas use. Samples are stored independently from the measurement section and hence changing of sample is possible at any time, while radiation cross-talk (ionizing radiation, stimulation light) is minimized. The measurement chamber has 1-2 positions for irradiation sources (Alpha, Beta, X-ray) and 2-4 for luminescence measurements. Two positions are also available for an automatic change of up to 4 luminescence light detection units (PMTs; CCDs, …).

Irradiation Unit

The Beta (Sr-90) irradiation unit was special designed to provide a homogeneous irradiation field and to allow RL (in particular radiofluorescence RF) measurements during Beta irradiation (dose rate about 0.1 Gy s-1). A deviation in radiation across the sample area (10 mm diameter) of < ±3 (about ±2% at 8mm) can be guaranteed. An Alpha-irradiator is also available (Am-241). X-ray units can be fitted on request.

OSL Stimulation Unit

There are possibilities of OSL excitation by up to 3 light-fiber coupled lasers. IRSL (850 nm), Blue (458 nm), Violet (405 nm) stimulations based on laser diodes, while Green (525 nm) stimulation is obtained by LEDs. Other wavelengths are available upon request. Stimulation can be obtained independently/simultaneously in CW or modulated mode (pulsed, linear/non-linear modulated), with the possibility of one port modified for external light source coupling (e.g. a tunable for luminescence excitation spectrometry).

Luminescence Detection Unit

The instrument can be equipped with up to 4 luminescence detection units at fixed measurement positions and/or hold an automatically detector changer which can switch up to 4 detection units between two general measurement positions (i.e. TL/OSL and RF). The detection units have optical shutters and can be extended by automatic filter-wheels to set appropriate luminescence detection windows. Filters as well as detectors can be changed within a measurement sequence.

Recommended Add ons or upgrades:

• Measurement chamber with automatic detector changer
  software controlled change of up to 4 detection units between TL/OSL and RF  also within a measurement sequence, for the most effective use of all luminescence detection options
• Beta irradiation unit
  highly uniform irradiation < ±3% @ ⌀10mm
• Extended blue/green/IR excitation (OSL, IRSL) unit
  laser light stimulation/⌀10mm, highly uniform, independent/simultaneous laser use
• UV-VIS PMT Module
  280 – 630 nm, opt. shutter
• EMCCD unit
  spatially resolved/single-grain measurements
• Imaging unit @ TL/OSL measurement position
  automatic imaging optics adaption, 2 automatically changing filter wheels… switch up to 36 detection windows, includes 6 optical filter packages
• LED-based monochrom (UVA) solar simulation unit
  365 – 375 nm, > 200 mW @ sample, necessary for IR-RF dose determination

• imaging unit @ RF measurement position
  spatially resolved/ single grain investigation + dating, e.g mineral identification, single-grain IR-RF dose determination, automat. setting of imaging optics & change of 6 detection windows (incl.)
• LED-based solar simulation unit
  use monochromatic LED light or mix UVA, blue, green, yellow, red & IR individually
• Extensions of chamber control & data evaluation software
  ext. temperature sequences programming, non-linear heating/ cooling and OSL functions, fast (ns) pulsed time-resolved OSL