Vortex®-ME7 Silicon Drift Detector
General Description
General Description—ME7 Silicon Drift Detector (SDD)
Vortex-ME7 is a seven-element silicon drift detector (SDD) X-ray detection system with a total active area of 210 mm2 - 350 mm2 design with a probe diameter of only 1.5" (38.1 mm).
The Vortex-ME7 offers superior energy resolution and high-throughput performance to enhance the total analytical performance of the X-ray spectrometry system.
Typical Applications
- X-ray fluorescence (XRF) spectroscopy, both bulk- and micro-fluorescence
- Synchrotron radiation applications
- Process control
- Fast X-ray mapping
The Vortex-ME7 SDD is operated at near room temperature and cooled by a thermoelectric cooler (TEC), and can be cycled as frequently as needed without any degradation in detector performance. Cool-down times are typically less than 3 minutes.
The Vortex-ME7 X-ray spectroscopy systems include a detector unit and control box which includes power supplies for the detector, TEC, and an optional digital pulse processor.
The complete detector also contains charge-sensitive preamplifiers and temperature-stabilization system, which eliminates concerns of varying ambient temperature.
Features
- Extended probe (300 mm - 600 mm)
- Large-area, seven-element silicon drift detector (210 mm2 - 350 mm2)
- Superb energy resolution
- Detector temperature stabilization
- Additional sizes available under special contracts
- Small and compact package for minimum vibration
- XMap, Mercury 4, or advanced DXP such as Xspress3 or Falcon X multi element processor
- Equipped with an ion pump
- RoHS
- Probe diameter: 1.5" (38.1 mm)
- Excellent resolution (Mn Kα) at ultra-high count rates
- Exceptional throughput
- Quantum Efficiency of Vortex® SDD sensors and X-ray transmission of Be Windows
X-ray transmission for Be x-ray windows
Specifications
| Name | Silicon Drift X-Ray Detector |
|---|---|
| Type | Vortex-ME7 |
| Overview |
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| Component Specifications |
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| Spectrometer Performance (each channel) using the Xmap | Energy resolution using 55Fe isotope: FWHM(eV) at 5.9 keV Peaking Time 1 µs, Typical <145 eV Maximum 155 eV Peaking Time 0.5 µs, Typical < 150 eV Maximum 170 eV Peaking Time 0.25 µs Typical < 165 eV Maximum 185 eV Peaking Time 0.1 µs Typical < 220 eV Maximum 260 eV Output count rate (OCR) of each channel at 50% dead time, with optimum pileup rejection performance, measured with X-ray tube excitation of a Mn sample Peaking Time: 1 µs 0.5 µs 0.25 µs 0.1 µs OCR(kcps) per Channel: >130 >250 >400 >700 Peak-to-background ratio (peak count at 5.9 keV divided by average counts between 1.6 keV and 3.2 keV background using 55Fe): >1000:1 at 1 µs peaking time Counting efficiency stability for 8 hours using 55Fe isotope: < +/-0.5% rms Counting efficiency stability with temperature (+5 to +30 °C) using 55Fe: < 200 ppm/°C Peak position stability with temperature (+5 to +30 °C) using 55Fe: < 20 eVat 200 kcps ICR |
Operating Environment
| Ambient Temperature | +5 to +30 °C |
|---|---|
| Humidity | 20 to 80% RH (no condensation) |
| Operating Position | Horizontal, or tilted from 0 – 90° with the detector end pointing down |
| Physical Specifications | Weight: 4.3kg Length × Height × Width: 425 mm × 165 mm 82 mm Standard cable length: 3 m |
| 4-channel digital pulse processor (Xmap from XIA) | Digitization: 14 bit, 50 MHz Gain: 16 bit, Gain DAC control Peaking Time: 0.1 – 100 µs Pileup rejection: Pulse pair resolution (PPR) better than 100ns ROIs: Up to 32 ROIs can be defined Timing: Multiple spectra, or ROIs can be stored with continuous operation using dual memory bank configuration. Integral non- linearity: <= 0.1% over the full scale output range |
| Data output | Spectrum size: 1024, 2048, 4096, 8192 Channel size: 10 eV |
| Software | xManager (from XIA) |
| Power Requirement and Consumption | Inlet line voltage (Inlet key selectable): 100 V+15%, 115 V+15%, 230 V+20% single phase Detector power consumption: < 40 W Xmap unit power consumption: < 20 W |
| Ion Pump | Requires power, when the system is OFF or in storage, to maintain vacuum. |
