MULTI-CHANNEL ANALYZER FOR X-RAY INVESTIGATIONS

MULTI-CHANNEL ANALYZERMULTI-CHANNEL ANALYZERFOR X-RAY INVESTIGATIONSFOR X-RAY INVESTIGATIONS

A.I.Klimov

M.D.Karetnikov

V.I.Zaitsev

Micro XRF Spectrometer

Multi-Channel Amplitude Analyzer with Si-pin X-ray detector BDER-11KI

Unit МАA-4К is made as one-module instrument, which is a spectrometric transducer-amplifier provided with the functions of superposition rejection and basic level restoration, featuring peak detector functions, those of a precision ADC complete with buffer memory and availability of transmitting the digital code to a PC, and including X-ray detector high-voltage power supply.

All this resulted in a compact, functionally complete, instrument for X-ray analysis.

МАA-4К

4k data channels; Conversion time < 3 s;Sliding-scale linearization; Differential nonlinearity <+-0.7%;Integral nonlinearity <+-0.5%; Gain stability <+- 50ppm/ C;Zero drift < +-10ppm/ C.

X-RAY DETECTION UNIT BDER-KI-11KX-RAY DETECTION UNIT BDER-KI-11K

Area of Application: nuclear power industry, geology, metallurgy, ecological monitoring system, processing of secondary raw materials, customs control and forensic studies.

Can be used within X-ray fluorescent analyzers for express analysis of the element composition of substances.

MAIN FEATURES

High energy resolution; Brilliant background characteristics; Small dimensions and weight; Free from liquid nitrogen; Random spatial orientation.

BASIC SPECIFICATION

Sensitive surface area of the unit 7 / 12 mm2

Thickness of the detector sensitive area 300 / 500 mkm

Energy resolution for energy 5,9 keV at formation time constant 20 microseconds for detector:

with area 7 mm2 not more than 230 eVwith area12 mm2 not more than 300 eV

Energy resolution for energy 59,6 keV at formation time constant 20 microseconds for detector:

with area 7 mm2 not more than 460 eVwith area 12 mm2 not more than 500 eV

Ratio of the full absorption peak height for energy 5,9 keV to the level of continuous amplitude distribution

for energy 3,5 keV (peak/noise not less than 800

Thickness of the entry Beryllium window 25 mkm ( 8 / 12 mkm – optionally )

Conversion coefficient at load not less than 1 kOm not less than 1 mV/keVOutput resistance 50±1 OmOutput signal polarity - negativeMaximum bias voltage of the detector at current less than 1 mkA 100VPreamplifier supply voltage at maximum current 35 mA ±12VMaximum current of the cooler 0,7 А at voltage 2 VWeight not more than 0,25 kgDimensions 15х61х34 mm

Functional diagram of MAA-4K

Multi-channels amplitude analyzer with high resolution X-ray detector

The test of energy resolution (Fe-55 - radioactive isotope)

FWHM=229eV

The test of the differential linearity (MAA-4K – BGI-A1)

X-RAY spectra, Am-241

Fluorescence Analyze

has a wide range of application, such as:

Ferrous and non-ferrous metallurgy, geology, mining, ecology, jewelry, forensic sciences, customs inspection, chemical industry, pharmacology

and pharmaceutics, human-related investigations, and many more …