XR-100CR is a gamma detector with a cooling system based on the Peltier effect. This detector is usually used in laboratory conditions that require medium energy resolution and low count rates. The detector is well suited for X-ray fluorescence analysis, identification of metal alloy markings, detection of lead in paint.
The maximum cooling temperature is -55 ºС and is controlled by a built-in temperature sensor.

Composition and properties
- 2-stage thermoelectric cooler
- Temperature sensor
- Beryllium window
- Multi-channel collimator
- Sealed housing

Application
- XRF analysis
- Detection of hazardous substances/waste disposal
- Portable gas analyzers
- As a component in the production of electronic systems
- Nuclear medicine
- Education and Research
- Art and Archaeology
- Control of technological processes
- Mossbauer spectroscopy
- Space exploration
- Environmental monitoring
- Monitoring the state of nuclear power plants
- Control of harmful emissions

Fig. 1. Spectrum of 55 Fe obtained on a 6 mm2 / 500 mm detector.
The resolution for the 5.9 keV 55Fe peak is 145 eV (FWHM) and 230 eV (FWHM) depending on the detector type and choice of time constants.
Options
- Variable thickness of beryllium window (0.3mm - 7.5 µm).
- A set of collimators for large flows.
- Vacuum execution
XR-100CR Specifications
General:
|
Detector type
|
Si-PIN
|
|
Detector size (sensitive area of the detector)
|
6 mm2 ( collimated to 4.4 mm2 ) 13 mm2 ( collimated to 11.1 mm2 ) 25 mm2 ( collimated to 21.5 mm2 )
|
|
Silicon thickness
|
500 µm (see efficiency curves)
|
|
Collimator
|
Multilayered
|
|
Energy resolution @ 5.9 keV ( 55 Fe)
|
145 eV (FWHM) and 230 eV (FWHM) depending on the detector type and choice of time constants.
|
|
Background
|
<5 x 10 -3 /s, 2 keV to 150 keV for 6 mm 2 /500 µm detector
|
|
Beryllium Window Thickness
|
1 mil (25 µm), or 0.5 mil (12.5 µm), see transmission curves
|
|
Charge sensitive preamplifier
|
Original Amptek production with high voltage reset
|
|
Gain stability
|
<20 ppm/°C (typical)
|
|
Dimensions
|
7.6 x 4.4 x 2.9 cm (see overall dimensions)
|
|
Weight
|
139 g
|
|
Total consumption
|
<1 W
|
|
Warranty period
|
1 year
|
|
Service life
|
5-10 years, depends on the intensity of use
|
|
Working conditions
|
0°C - +40°C
|
|
Storage and transportation
|
Long term storage: 10+ years in dry place
Standard conditions: -20°C to +50°C, 10 - 90% humidity
|
|
TUV Certification Certificate #: CU 72072412 01 Tested: UL 61010-1: 2004 R7 .05 CAN/CSA-C22.2 61010-1: 2004
|
|
Input parameters
|
|
Nutrition
|
|
Power supply for the XR-100CR detector
|
9 B
|
|
Preamplifier power supply
|
±8 to 9 V @ 15 mA with no more than 50 mV peak-to-peak noise
|
|
Power supply for the XR-100CR detector crystal
|
+180 V (power supply should be able to produce between +100 to 200 V @ 1 µA) very stable <0.1% variation
|
|
Cooler power supply
|
Current 350mA max, voltage 4V max with <100mV peak-to-peak noise *XR-100CR includes its own temperature sensor
|
|
Output parameters
|
|
Output signal
|
The XR100CR output swings from +5 V to -5 V. The reset period will vary depending on the detector type and count rate.
|
|
Preamplifier sensitivity
|
1 mV/keV (may vary for different detectors)
|
|
Preamplifier polarity
|
Negative signal output (1kOhm maximum load)
|
|
Preamplifier response
|
Reset by detector capacity
|
|
Temperature sensor sensitivity (diode)
|
770 mV = -50 °C
|
  |
  |
| Fig. 2a. Configuration of the X-123, which includes a detector, preamplifier, processor and power supply in a single housing. |
Fig. 2b. The assembled detector and preamplifier are available as components for electronic systems. |

Fig. 3. Modifications of the XR100CR detector
Digital Pulse Processor and Power Supply for XR-100CR
The XR-100CR/PX5 system guarantees stable operation in less than one minute after power is applied.

Fig. 4. Block diagram

Fig. 5. Resolution versus peak formation time for Si-PIN and SDD detectors

Fig. 6. Resolution as a function of count rate for different peak formation times
Efficiency curves

Fig. 7. Particle detection efficiency for the XR-100CR detector.
Due to its unique design and reliability, this detector was chosen for the search mission to analyze Martian rocks.
The first spectrum of a stone from Mars!

Fig. 8. The first spectrum from Mars
XRF system based on XR-100CR and Mini-X X-ray tube

Rice. 9. XRF system

Fig. 10. XR100CR and Mini-X on MP1 XRF circuit board