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PURPOSE
Measurement of gamma radiation energy and accumulation of registered information as statistical distribution of energy (spectra) and its transfer through standard data transmission lines to a computer for further processing.
APPLICATION
Building of spectrometric systems for laboratory and industrial application for qualitative and quantitative analysis of gamma emitting radionuclides.
COMPONENTS
- Detector: NaI(Tl) or LaBr3(Ce) crystal *;
- Photo-multiplier tube (PMT);
- Spectrometric path with signal digital processing;
- LED lamp for path stabilization;
- Voltage converters for power supply of electronics and PMT;
- Processor and spectrum memory;
- RS-485 interface or USB for connection with a computer.
FEATURES
- Digital processing of analog signal ensures increase of intensity and stability of the device parameters;
- Application of LaBr3(Ce) crystals allows manufacturing of scintillation spectrometers with high energy resolution;
- Detecting devices with crystals of various types and sizes in combination with several types of communication interfaces allows development of customized spectrometric systems;
DETECTOR TYPE AND SIZE
Standard UDS-GC models use Ø40х40 and Ø63х63 mm3 NaI(Tl) scintillation crystals and Ø38х38 mm3 LaBr3(Ce) crystals*.
BASIC SPECIFICATIONS
| Parameter |
NaI(Tl) |
LaBr3(Ce) |
| Range of detected energies, MeV |
( 0,05 – 3) |
| Relative energy resolution for the 662-keV line (137Cs), %, not exceeding |
8 |
3.5 |
| Integral non-linearity, %, not exceeding |
1 |
| Parameters of digital filter kernel, μsec |
Front |
0.8 |
| Flat top |
0.2 |
| Number of accumulated spectrum channels |
1024 |
| Accumulated spectrum channel capacity |
232 - 1 |
| LLD adjustment range, spectrum channels |
1-1000 |
| LLD adjustment step, spectrum channels |
1 |
| Maximum input statistical intensity, cps, not less than |
1,5*105 |
2,5*105 |
| Relative change of the resolution for the 662-keV (137Cs) line at the maximum intensity, %, not exceeding |
15 |
| Relative displacement of the 662-keV (137Cs) peak at the maximum intensity, %, not exceeding |
1 |
| Time instability over 24 hours of continuous operation, % |
1 |
| Additional conversion characteristic instability due to temperature variation, %/ /0С, no more than |
0.1 |
| Ingress protection |
IP54 |
| Range of operating temperatures, 0С ** |
от +5 до + 40 |
PARAMETERS OF THE UDS-GC INTERFACES FOR CONNECTION TO A COMPUTER
| Interface RS-485 |
| Protocol for serial data transmission |
ModBus |
| RS-485 serial transmission rate, bit/s |
9600-115200 |
| Number of devices connected to one RS-485 bus, not more |
31 |
| Type of connector for connection to a computer |
2РМ |
| Type of connection |
Cable input, 1.3 m |
| External power supply, V |
9-18 |
| Consumed power, W, no more |
1.3 |
| Galvanic isolation |
Power supply and RS-485 |
| USB Interface |
| USB specification version |
2.0 |
| Type of connector for connection to a computer |
USB type А |
| Type of connection |
Cable input 4.5 m |
| Power supply from bus, V |
5 ± 10% |
| Max consumed power, W |
0.7 |
DESIGN MODIFICATIONS, DESIGNATIONS AND TYPICAL OVERALL DIMENSIONS
| Name |
Crystal |
Interface |
Length |
Diameter |
Weight |
| UDS-GC–40x40–485 |
NaI(Tl) Ø40х40 |
RS-485 |
300 mm |
66 mm |
1.2 kg |
| UDS-GC–40x40–USB |
NaI(Tl) Ø40х40 |
USB |
300 mm |
66 mm |
1.2 kg |
| UDS-GC–63x63–485 |
NaI(Tl) Ø63х63 |
RS-485 |
350 mm |
88 mm |
2.1 kg |
| UDS-GC–63x63–USB |
NaI(Tl) Ø63х63 |
USB |
350 mm |
88 mm |
2.1 kg |
| UDS-GC–V380–38x38–485 |
LaBr3(Ce) Ø38х38 |
RS-485 |
300 mm |
66 mm |
1.2 kg |
| UDS-GC–V380–38x38–USB |
LaBr3(Ce) Ø38х38 |
USB |
300 mm |
66 mm |
1.2 kg |
NOTES
*Upon request, other detecting devices with scintillation crystals of other types and sizes can be manufactured.
**Upon request, detecting units with a wider temperature range can be manufactured.
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