深圳灣邊貿(mào)易公司            

深圳灣邊貿(mào)易進(jìn)口代理Amptek XR-100CR X射線探測器*！Amptek X射探測系統(tǒng)，Amptek X光檢測儀，  Amptek手執(zhí)X射線探測器*！

Features Si-PIN Photodiode 2-Stage Thermoelectric Cooler Temperature Monitor Beryllium Window Multilayer Collimator Hermetic Package （TO-8） Wide Detection Range Easy to Operate Additional Information Selection Guide Additional Performance Spectra and Detector Properties Application Spectra Si-PIN vs. CdTe Mechanical Dimensions Multilayer Collimator OEM & Custom Applications Accessories MP1 XRF Mounting Plate Vacuum Applications Collimator Kit （high flux applications） Experimenter's XRF Kit

Applications X-Ray Fluorescence RoHS/WEEE Portable Instruments OEM Nuclear Medicine Teaching and Research Art and Archaeology Process Control Mössbauer Spectrometers Space and Astronomy Environmental Monitoring Nuclear Plant Monitoring Toxic Dump Site Monitoring PIXE

Figure 1.⁵⁵Fe Spectrum taken with a 6 mm²/500 µm detector.

The resolution for the the 5.9 keV peak of⁵⁵Fe is 145 eV FWHM to 230 eV FWHM depending on detector type and shaping time constant. SeeSelection Guide.

Theory of Operation

X-rays interact with silicon atoms to create an average of one electron/hole pair for every 3.62 eV of energy lost in the silicon. Depending on the energy of the incoming radiation, this loss is dominated by either the Photoelectric Effect or Compton scattering. The probability or efficiency of the detector to "stop" an x-ray and create electron/hole pairs increases with the thickness of the silicon.See efficiency curves.

In order to facilitate the electron/hole collection process, a 100-200 volt bias voltage is applied across the silicon depending on the detector thickness. This voltage is too high for operation at room temperature, as it will cause excessive leakage, and eventually breakdown. Since the detector in the XR-100CR is cooled, the leakage current is reduced considerably, thus permitting the high bias voltage. This higher voltage decreases the capacitance of the detector, which lowers system noise.

The thermoelectric cooler cools both the silicon detector and the input FET transistor to the charge sensitive preamplifier. Cooling the FET reduces its leakage current and increases the transconductance, both of which reduce the electronic noise of the system.

Since optical reset is not practical when the detector is a photodiode, the XR-100CR incorporates a novel feedback method for the reset to the charge sensitive preamplifier. The reset transistor, which is typically used in most other systems has been eliminated. Instead, the reset is done through the high voltage connection to the detector by injecting a precise charge pulse through the detector capacitance to the input FET. This method eliminates the noise contribution of the reset transistor and further improves the energy resolution of the system.

A temperature monitor diode chip is mounted on the cooled substrate to provide a direct reading of the temperature of the internal components, which will vary with room temperature. Below -20 癈, the performance of the XR-100CR will not change with a temperature variation of a few degrees. Hence, closed loop temperature control is not necessary when using the XR-100CR at normal room temperature. For OEM applications or hand held XRF instrumentation a closed loop temperature control is recommended. The Active Temperature Control is standard in Amptek electronics such as the PX5 and DP5/PC5.

XR100-CR Specifications

General
Detector Type	Si-PIN
Detector Sizes	6 mm2（collimated to 4.4 mm2） 13 mm2（collimated to 11.1 mm2） 25 mm2（collimated to 21.5 mm2） See Selection Guide
Silicon Thickness	500 µmSee efficiency curves
Collimator	Multilayer,click here for more information
Energy Resolution @ 5.9 keV （55Fe）	145 eV FWHM to 230 eV FWHM depending on detector type and shaping time constant. See Selection Guide
Background Counts	<5 x 10-3/s, 2 keV to 150 keV for 6 mm2/500 µm detector
Detector Be Window Thickness	1 mil （25 µm）,or 0.5 mil （12.5 µm）,See transmission curves
Charge Sensitive Preamplifier	Amptek custom design with reset through the H.V. connection
Gain Stability	<20 ppm/°C （typical）
Case Size	3.00 x 1.75 x 1.13 in （7.6 x 4.4 x 2.9 cm）,See mechanical dimensions
Weight	4.9 ounces （139 g）
Total Power	<1 Watt
Warranty Period	1 Year
Typical Device Lifetime	5 to 10 years, depending on use
Operation conditions	0°C to +40°C
Storage and Shipping	Long term storage: 10+ years in dry environment Typical Storage and Shipping: -20°C to +50°C, 10 to 90% humidity non condensing
	TUV Certification Certificate #: CU 72072412 01 Tested to: UL 61010-1: 2004 R7 .05 CAN/CSA-C22.2 61010-1: 2004
Inputs
Preamp Power	±8 to 9 V @ 15 mA with no more than 50 mV peak-to-peak noise
Detector Power	+180 V （power supply should be able to produce between +100 to 200 V @ 1 µA） very stable <0.1% variation
Cooler Power	Current = 350 mA maximum, voltage = 4 V maximum with <100 mV peak-to-peak noise Note: the XR-100CR includes its own temperature controller