EN
XR-100T-CdTe
The XR-100T-CdTe is a high performance X-ray and gamma ray detector with both a cooling system and a preamplifier using a cadmium tellurium diode. All internal components are maintained at approximately -30 ºC, which is monitored by an internal temperature sensor. The hermetically sealed TO-8 package has a light- and vacuum-tight 4 mil (100 µm) beryllium window.
Peculiarities
|
Application
|
To ensure fast and convenient operation for the user, all key connections between the detector and preamplifier have been made inside the XR-100T-CdTe. The XR-100T-CdTe detector is also equipped with BNC connectors and a power cable.
XR-100T-CdTe is capable of recording energies from a few keV to several HUNDREDS of keV!
Fig.1 Spectrum of 57 Co.
Operating principle.
X-rays and gamma rays interact with CdTe atoms to create, on average, 1 electron-hole pair for every 4.43 eV of energy absorbed in CdTe.
The temperature sensor is mounted on a cooled substrate, which allows direct measurement of the temperature of the built-in components, which will differ from the room temperature. Once the internal temperature drops below -10 °C, the performance of the XR-100T-CdTe will not change with a temperature change of several degrees. Therefore, precise temperature control is not necessary when using the XR-100T-CdTe inside the laboratory.
Working in a vacuum
The XR-100CR can operate in air or vacuum, down to 10 -8 Torr. There are two options for vacuum operation: 1) The detector and preamplifier can be placed inside the chamber. To avoid overheating and dissipate 1 W of energy, it is necessary to control the XR-100CR, and 4 mounted holes should provide good thermal conductivity of the chamber walls. The optional 9DVF 9-Pin D model with a Conflat vacuum connection allows the XR-100CR to be connected to a PX2CR or PX5 located outside the vacuum chamber. 2) The XR-100CR can be mounted outside the chamber and register gamma rays inside the chamber through a port with a standard Conflat flange with an O-ring. The optional EXV9 model is intended for this purpose.
Characteristics
Model XR-100T-CdTe is an X-ray and gamma radiation detector.
General |
|
| Detector type | Cadmium Tellurium (CdTe) Diode |
| Detector area | 3 x 3 mm (9 mm 2 ) or 5 x 5 mm (25 mm 2 ) |
| Detector thickness | 1 mm |
| Energy resolution at 122 keV, 57 Co | 9 mm2 : <1.2 keV (FWHM)25 mm2 : <1.5 keV (FWHM) |
| Dark counts | <5 x 10 -3 1/sec at 10 keV < E < 1 MeV |
| Detector window | Be, 4 mil (100 µm) |
| Preamplifier | Charge sensitive |
| Overall dimensions | 3.00 x 1.75 x 1.13 in (7.6 x 4.4 x 2.9 cm) |
| Weight | 4.4 ounces (125 g) |
| Total power | < 1 W |
| terms of Use | from 0°C to +40°C |
| Storage and transportation | Long-term storage: 10+ years in dry conditionsStandard conditions: -20°C - +50°C, 10 - 90% humidity without condensation |
 |
TUV CertificationCertificate #: CU 72072412 01Tested: UL 61010-1:2004 R7 .05CAN/CSA-C22.2 61010-1:2004 |
Input parameters |
|
| Preamplifier power supply | ±8 volts at 25 mA |
| Detector power supply | +500 volts at 1 µA |
| Cooling power supply | Current = 350mA max. Voltage = 4V max. |
Output parameters |
|
| Preamplifier:SensitivityPolarity | 0.82 mV/keV output negative signal (1 kOhm max load) |
| Temperature sensor:Sensitivity | PX5: Direct reading in K via software. |
Additionally
- Other detector sizes (5x5x1mm) are available upon special order.
- Other thickness of beryllium (Be) glass (on special order)
- Components for vacuum operation
- Collimators for working with high flows
- Available in X-123CdTe configuration
Fig.3 CdTe detector in X-123CdTe configuration
XR-100T-CdTe Connectors
| Preamplifier output | BNC connector |
| Power and signal | 6-Pin LEMO Connector (Part# ERA.1S.306.CLL) |
| Connecting cable | 6-Pin LEMO (Part# FFA.1S.306.CLAC57) to 6-Pin LEMO (5 ft. length) |
6-Pin Lemo Connector Channels
| Pin 1 | Temperature sensor diode |
| Pin 2 | High Voltage Bias Sensor (+), +500V |
| Pin 3 | Preamplifier power supply, -8 volts |
| Pin 4 | Preamplifier power supply, +8 volts |
| Pin 5 | Cooling Power Return |
| Pin 6 | Cooling power supply (0 to +4 volts at 0.350 A max.) |
| Case | Grounding |
Digital Pulse Processor (Counter) PX5, MCA, and Power Supply for XR-100T-CdTe
The XR-100CR is powered by the PX5. The PX5 is powered by DC via an AC adapter and provides a variety of digital pulse amplifiers (from 0.200 µs to 100 µs peak time), multi-channel analyzer (MCA) functions, and all necessary power supplies for the detector and preamplifier. The PX5 connects to a computer via USB, RS232, or Ethernet.
The XR-100CR/PX5 system guarantees stable operation in less than one minute after power is applied.
Fig. 4 This diagram shows the internal connection arrangement between the AXR hybrid sensor and the enclosure electronics, as well as the external connection to the PX5.
Fig.5 Throughput for different peak times. XR-100T-CdTe shows the best resolution in the range from 1 to 6 µs.
CdTe Registration Efficiency
For 1mm CdTe thickness and various Be window thicknesses.
Fig. 6 Logarithmic graph of the interaction probability in the energy range from 1 keV to 1 MeV
Fig. 7 Linear graph of the interaction probability in the energy range from 10 keV to 250 keV.
