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Digital Multi Channel Analyzer DigiSpectrum

APPLICATION

The Digital Spectrometric Device DigiSpectrum is a high - precision, ultra-fast all - digital spectrometer, comprising a single processing channel, a preamplifier power supply and a detector bias supply in a compact package. The Digital Spectrometric Device can accept signals from practically any radiation detector. The Digital Spectrometric Device has built-in support for HPGe detectors with a Compton shield.

FEATURES

Pulse heights measured with up to 16 bits accuracy (i.e. 32K spectrum length).
Programmable gain, input offset, and peaking times between 0.25 and 40 microseconds.
Programmable pileup inspection criteria include trigger filter parameters, threshold, and rejection criteria.
Peak stability with rate: 0.05% up to highest ICR.
Integral Nonlinearity of Energy: = 0.1% of full scale.

TECHNICAL CHARACTERISTICS

Signal Input (Analog) - Works with common reset or resistor feedback preamps of either polarity.

Impedance: 50 Ohms, 90 Ohms, 250 Ohms, and 1k Ohms - jumper selectable.
Attenuation: 1:21, 1:12, 1:5 and 1:1- jumper selectable.
Voltage Range: +10.0 V to -10.0 V standard.

Inputs (Digital)

Gate Input: Analog input for Compton suppression. Can alternatively be configured as digital I/O.
HV Inhibit: TTL logic input. BNC connector, jumper set active HI or LO.

Interface:

USB: Universal Serial Bus.

Digital Controls:

Gain: 50X coarse gain (2% accuracy), fine gain controlled by 16 bit DAC.
Shaping: Triangular/Trapezoidal. Peaking time and dwell set independently : 50ns - 45 microseconds in small steps. Adjustable dwell time may be used to eliminate ballistic deficit effects.
Pileup: Set fast channel filter time, pulse detection threshold, and fast channel pileup inspection test limits to achieve best results in each situation.
Spectrum: 1K-32K bins, 32 bits deep (4.3 billion counts per bin)

Collection:

Livetime; Realtime; input/output count rates; Compton coincidence rate.

Power Outputs:

Detector Supply: High Voltage +/- 5kV, SHV connector, push-button on/off, front panel adjust, 60 sec. on/off ramp standard.
Preamp Supply: standard preamp power voltages +/- 24V and +/- 12V, each to 100 mA.
Power Requirements: 110 V at 0.2 A 50/60 Hz or 220 V at 0.1 A 50/60 Hz, specify at time of order.

Software package

SpectraLineGP spectra processing includes calibration, peaks parameters determination, nuclides identification, activities calculation and using the true-coincident factors for the gamma-emission intensity correction. Non-parametric model for pattern of the full energy peak provides a correct model for a line in any energy range.

Functionalities

automatic peaks search with the required sensitivity level;
the energy, FWHM and peak pattern calibrations;
peaks parameters determination - position, FWHM, area; calculation results can be saved to a text file;
efficiency “curves” can be obtain with the efficiency calibration;
activity calculation by various methods;
use the true-coincident factors to correct the gamma-emission intensity;
the measured spectra and processing results saving to database for the analysis of the specified criterions convergence of the repeated measurements;
simultaneous processing of any spectra number;
the peak pattern calibration with several spectrum peaks in different energy ranges;
numeric and visual control of the calibrations results;
any measurement tracts number;
independent control of all channels - start, stop, etc.

For additional information, please contact us: sales@bsi.lv.

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